Relevant bibliographies by topics / Air Purification Photocatalysis

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Air Purification Photocatalysis'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Air Purification Photocatalysis"

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Hu, Cheng Zhen, Yan Nan Cai, Jiang Wu, Bi Chen Yan, Xue Jun Qiu, Hai Ting He, Liu Liu Zhang, and Yue Yu. "Study on Photocatalytic Technology with Photovoltaic-Thermal Integration and its Applications in Indoor Air Purification." Advanced Materials Research 864-867 (December 2013): 1360–63. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.1360.

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In terms of energy and environmental purification, application of photocatalytic purification in energy and environment is getting increasingly widespread. In the present paper, it focused on the applications of photocatalytic technology in indoor air purification. Photocatalyst and photocatalytic reaction devices are the two issues in photocatalytic air purification. Fe-La co-doped TiO2 was prepared, and integration of photovoltaic-thermal circular photocatalytic air purification reactor was designed, which showed high air purification efficiency. The experimental data and theoretical analysis gave the support to exploit new indoor air purification technologies. Further, technical and economic analysis on photocatalysis technology with photovoltaic-thermal integration applying in indoor air purification was studied and helpful results were attained.
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Alalm, Mohamed Gar, Ridha Djellabi, Daniela Meroni, Carlo Pirola, Claudia Letizia Bianchi, and Daria Camilla Boffito. "Toward Scaling-Up Photocatalytic Process for Multiphase Environmental Applications." Catalysts 11, no. 5 (April 28, 2021): 562. http://dx.doi.org/10.3390/catal11050562.

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Recently, we have witnessed a booming development of composites and multi-dopant metal oxides to be employed as novel photocatalysts. Yet the practical application of photocatalysis for environmental purposes is still elusive. Concerns about the unknown fate and toxicity of nanoparticles, unsatisfactory performance in real conditions, mass transfer limitations and durability issues have so far discouraged investments in full-scale applications of photocatalysis. Herein, we provide a critical overview of the main challenges that are limiting large-scale application of photocatalysis in air and water/wastewater purification. We then discuss the main approaches reported in the literature to tackle these shortcomings, such as the design of photocatalytic reactors that retain the photocatalyst, the study of degradation of micropollutants in different water matrices, and the development of gas-phase reactors with optimized contact time and irradiation. Furthermore, we provide a critical analysis of research–practice gaps such as treatment of real water and air samples, degradation of pollutants with actual environmental concentrations, photocatalyst deactivation, and cost and environmental life-cycle assessment.
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Jiang, Zhuoying, and Xiong (Bill) Yu. "Kinetic studies on using photocatalytic coatings for removal of indoor volatile organic compounds." Indoor and Built Environment 29, no. 5 (July 8, 2019): 689–700. http://dx.doi.org/10.1177/1420326x19861426.

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Titanium dioxide (TiO2) is a known photocatalyst with a capability of decomposing organic substances. However, the photocatalysis of the pure TiO2 is not effective for the indoor environment due to a lack of the ultraviolet irradiation inside a building. Doping TiO2 with substance such as C, N, or metal can extend the threshold of the absorption spectrum to the visible spectrum region. Thus, doped-TiO2 is able to decompose volatile organic compounds (VOCs) under an indoor environment. To date, most experimental works reported on photocatalytic kinetics were conducted inside small-scale devices. The performance of air purification function under the actual indoor application scenery need to be further clarified. For this purpose, it is crucial to predict the performance of autogenous air quality improvements by visible light-driven photocatalyst for the actual applications. This work has developed a model to evaluate the performance of functional coating with photocatalyst in removing VOCs. Factors such as the effects of coating designs and indoor ambient conditions on the air purification efficiency were studied. This work demonstrates that doped-TiO2 photocatalytic coating is effective to improve the indoor air quality.
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Janczarek, Marcin, and Ewa Kowalska. "Computer Simulations of Photocatalytic Reactors." Catalysts 11, no. 2 (February 3, 2021): 198. http://dx.doi.org/10.3390/catal11020198.

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Photocatalysis has been considered future technology for green energy conversion and environmental purification, including carbon dioxide reduction, water splitting, air/water treatment, and antimicrobial purposes. Although various photocatalysts with high activity and stability have already been found, the commercialization of photocatalytic processes seems to be slow; it is thought that the difficulty in scaling up photocatalytic processes might be responsible. Research on the design of photocatalytic reactors using computer simulations has been recently intensive. The computer simulations involve various methods of hydrodynamics, radiation, and mass transport analysis, including the Monte Carlo method, the approximation approach–P1 model, and computational fluid dynamics as a complex simulation tool. This review presents all of these models, which might be efficiently used for the scaling-up of photocatalytic reactors. The challenging aspects and perspectives of computer simulation are also addressed for the future development of applied photocatalysis.
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Salvadores, Federico, Orlando Mario Alfano, and María de los Milagros Ballari. "ASSESSMENT OF THE INDOOR AIR PURIFICATION BY PHOTOCATALYTIC PAINTS." Latin American Applied Research - An international journal 50, no. 2 (February 21, 2020): 71–76. http://dx.doi.org/10.52292/j.laar.2020.352.

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Photocatalytic building materials containing TiO2 were extensively studied for outdoor applications using solar radiation. Nowadays, the market offers a wide variety of these materials with self-cleaning and air purification functionalities. However, heterogeneous photocatalysis applied in indoor construction materials was less developed. The objective of this work is to investigate the photocatalytic performance of carbon doped TiO2 in replacement of the normal pigments in indoor wall paint formulations. To achieve this goal, the photocatalytic oxidation of acetaldehyde in gas phase was carried out. The air decontamination process was conducted using regular indoor light in a bench scale chamber photoreactor simulating a room. The main environmental conditions that affect the photocatalytic process were varied: air flow rate, irradiance, relative humidity and acetaldehyde concentration. The results were analyzed through the response surface methodology and revealed the air purifying power of photocatalytic paints under indoor conditions.
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Boumahdi, Meryeme, Chaker El Amrani, and Siegfried Denys. "An Innovative Air Purification Method and Neural Network Algorithm Applied to Urban Streets." International Journal of Embedded and Real-Time Communication Systems 10, no. 4 (October 2019): 1–19. http://dx.doi.org/10.4018/ijertcs.2019100101.

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In the present work, multiphysics modeling was used to investigate the feasibility of a photocatalysis-based outdoor air purifying solution that could be used in high polluted streets, especially street canyons. The article focuses on the use of a semi-active photocatalysis in the surfaces of the street as a solution to remove anthropogenic pollutants from the air. The solution is based on lamellae arranged horizontally on the wall of the street, coated with a photocatalyst (TiO2), lightened with UV light, with a dimension of 8 cm × 48 cm × 1 m. Fans were used in the system to create airflow. A high purification percentage was obtained. An artificial neural network (ANN) was used to predict the optimal purification method based on previous simulations, to design purification strategies considering the energy cost. The ANN was used to forecast the amount of purified with a feed-forward neural network and a backpropagation algorithm to train the model.
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Mengjie, Wu, and Liu Kun. "Application of and research on TiO2 photocatalysis technology." E3S Web of Conferences 165 (2020): 05001. http://dx.doi.org/10.1051/e3sconf/202016505001.

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Nano-TiO2 photocatalysis technology is a new environmental pollutant purification technology, but its application is very extensive. This paper introduces the photocatalytic properties of nano-TiO2, and summarizes the research progress of nano-TiO2 in industrial wastewater, marine pollution, solid waste degradation, air purification and sterilization. At the same time, it is pointed out that the nano-TiO2 photocatalytic technology has not fully reached the practical application level, and the development trend of nano-TiO2 photocatalytic materials is prospected. Photocatalytic oxidation (PCO) using nanomaterials is a promising technology for removing pollutants, especially in deodorization, degradation of volatile organic compounds (VOCs) and sterilization. The mechanism of nanometer photocatalysis was reviewed in this paper. The influence factors including initial concentration of pollutants, reaction time, light intensity, humidity, surface area and catalyst activity were discussed. Furthermore, the application in photocatalytic removal of gas phase contaminants was summarized, and the future development of its application was proposed based on the existing problems.
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Ding, Jun. "Preparation of TiO2 Photocatalysis Antibacterial Ceramics." Key Engineering Materials 575-576 (September 2013): 302–5. http://dx.doi.org/10.4028/www.scientific.net/kem.575-576.302.

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Among various inorganic antibacterial materials, TiO2 photocatalysis antibacterial materials possess unique properties including long lifespan, nontoxicity, high temperature resistance as well as high physical and chemical stability. More significantly, they are largely involved in many photocatalytic effects such as degradation of organics, purification of air, sewage disposal and self-cleaning.
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Hay, Stephen, Timothy Obee, Zhu Luo, Ting Jiang, Yongtao Meng, Junkai He, Steven Murphy, and Steven Suib. "The Viability of Photocatalysis for Air Purification." Molecules 20, no. 1 (January 14, 2015): 1319–56. http://dx.doi.org/10.3390/molecules20011319.

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Halak, О., N. Poltorak, О. Kravchuk, V. Synko, and Y. Korol. "APPLICATION OF TITANIUM OXIDE COATINGS FOR NEUTRALIZATION OF HAZARDOUS CHEMICAL SUBSTANCES." Collection of scientific works of Odesa Military Academy 2, no. 12 (December 27, 2019): 131–36. http://dx.doi.org/10.37129/2313-7509.2019.12.2.131-136.

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Contamination of hazardous chemicals is currently considered one of the major environmental problems. The methods of purification of gaseous emissions depending on the physicochemical properties of pollutants, in particular dangerous chemical, their aggregate state, concentration in the gas environment are studied in this article. The effect of aerosol content such as dust and soot is analyzed as well as the efficiency of purification methods at different temperature intervals, methods of purification of multicomponent mixtures. The comparative characteristics of thermochemical, reagent, sorption and catalytic methods are given and the prospects of their application in filtering systems of stationary and mobile objects are evaluated. It has been proved that almost any organic compounds can be oxidized (mineralized) on the TiO2surface. In practice, any photocatalytic air purifier includes a porous TiO2 deposited carrier, which is irradiated with ultraviolet rays and through which air is purged. Photocatalysis is suitable for domestic use as it can occur at room temperature. For example, a thermocatalytic method of destroying harmful substances requires preheating the air to a temperature above 200 ° C. Photocatalysis destroys substances that penetrate even through activated carbon filters. Features of formation of oxide coatings by plasma-electrolytic oxidation of titanium alloys are considered. It is proposed to refine the design of collective defense systems on armored vehicles and stationary facilities with additional installation in the filter-absorber of the grid with the deposited layer of catalytic material, which will neutralize various types of dangerous chemicals due to photocatalytic air purification.
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Dissertations / Theses on the topic "Air Purification Photocatalysis"

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Lam, Chun-wai Ringo, and 林俊偉. "Development of photocatalytic oxidation technology for purification ofair and water." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38572382.

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Zhang, Yangyang. "Modeling and Design of Photocatalytic reactors for Air Purification." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4621.

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Photocatalysis is a promising technique for the remediation of indoor air pollution. Photocatalysis utilizes semiconductor photocatalysts (such as TiO2 or ZnO) and appropriate light to produce strong oxidizing agents (OH*) that are able to break down organic compounds and inactivate bacteria and viruses. The overall goal of the research is to develop an efficient photocatalytic reactor based on mass transfer for indoor air purification. This study has focused on the enhancement of the effectiveness of the photocatalytic process by the introduction of artificial roughness on the reactor catalyst surface. The major effect of artificial roughness elements on the catalytic surface is to create local wall turbulence and enhance the convective mass transfer of the contaminants to the catalyst surface and thus lead to an increase in the effectiveness of photocatalysis. Air flow properties in a model photoreactor channel with various roughness patterns on the interior wall surface were theoretically investigated. The optimum shapes, sizes, and arrangements of roughness were determined for the maximum enhancement of turbulence intensity in the channel. The possible order of photocatalytic reactor performance for various roughness patterns was also determined. In order to verify the theoretical analysis results, experimental studies were carried out. A plate type photocatalytic reactor was designed and fabricated on the basis of the theoretical results. It was determined that the photocatalytic reactor performance is greatly improved with various rough catalyst surfaces. The experimental results verified the theoretical results. The relationship between the overall reaction rate constant (k) of the reactor and the magnitude of the turbulence intensity was found out. An empirical correlation expression was also proposed. This is the first study of the effect mass transfer in a rough catalytic surface for photocatalytic reactor. Photocatalyst development has also been studied. Zinc oxide (ZnO) and iron doped zinc oxide (ZnO/Fe) nanowires were synthesized on glass substrates through a conventional hydrothermal method. The photocatalytic activities under ultraviolet (UV) light and white light irradiation were separately investigated. The ZnO/Fe nanowires exhibited an enhanced photocatalytic activity as compared to ZnO nanowires regardless of the type of contaminants and light sources.
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Land, Eva Miriam. "Photocatalytic degradation of NOX, VOCs, and chloramines by TiO2 impregnated surfaces." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34857.

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Experiments were conducted to determine the photocatalytic degradation of three types of gas-phase compounds, NOX, VOCs, and chloramines, by TiO2 impregnated tiles. The oxides of nitrogen NO and NO2 (NOx) have a variety of negative impacts on human and environmental health ranging from serving as key precursors for the respiratory irritant ozone, to forming nitric acid, which is a primary component of acid rain. A flow tube reactor was designed for the experiments that allowed the UV illumination of the tiles under exposure to both NO and NO2 concentrations in simulated ambient air. The reactor was also used to assess NOx degradation for sampled ambient air. The PV values for NO and NO2 were 0.016 cm s-1 and 0.0015 cm s-1, respectively. For ambient experiments a decrease in ambient NOx of ~ 40% was observed over a period of roughly 5 days. The mean PV for NOx for ambient air was 0.016 cm s-1 and the maximum PV was .038 cm s-1. Overall, the results indicate that laboratory conditions generally simulate the efficiency of removing NOx by TiO2 impregnated tiles. Volatile organic compounds (VOC's) are formed in a variety of indoor environments, and can lead to respiratory problems (US EPA, 2010). The experiments determined the photocatalytic degradation of formaldehyde and methanol, two common VOCs, by TiO2 impregnated tiles. The same flow tube reactor used for the previous NOX experiments was used to test a standardized gas-phase concentration of formaldehyde and methanol. The extended UV illumination of the tiles resulted in a 50 % reduction in formaldehyde, and a 68% reduction in methanol. The deposition velocities (or the photocatalytic velocities, PV) were estimated for both VOC's. The PV for formaldehyde was 0.021 cm s-1, and the PV for methanol was 0.026 cm s-1. These PV values are slightly higher than the mean value determined for NO from the previous experiments which was 0.016 cm s-1. The results suggest that the TiO2 tiles could effectively reduce specific VOC levels in indoor environments. Chlorination is a widespread form of water disinfection. However, chlorine can produce unwanted disinfection byproducts when chlorine reacts with nitrogen containing compounds or other organics. The reaction of chlorine with ammonia produces one of three chloramines, (mono-, di-, and tri-chloramine). The production of chloramines compounds in indoor areas increases the likelihood of asthma in pool professionals, competitive swimmers, and children that frequently bath in indoor chlorinated swimming pools (Jacobs, 2007; Nemery, 2002; Zwiener, 2007). A modified flow tube reactor in conjunction with a standardized solution of monochloramine, NH2Cl, determined the photocatalytic reactions over the TiO2 tiles and seven concrete samples. The concrete samples included five different concrete types, and contained either 5 % or 15 % TiO2 by weight. The PV for the tiles was 0.045 cm s-1 for the tiles manufactured by TOTO Inc. The highest PV from the concrete samples was 0.054 cm s-1. Overall the commercial tiles were most efficient at reducing NH2Cl, compared to NOX and VOC compounds. However, the concrete samples had an even higher PV for NH2Cl than the tiles. The reason for this is unknown; however, distinct surface characteristics and a higher concentration of TiO2 in the concrete may have contributed to these findings.
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Lam, Chun-wai Ringo. "Development of photocatalytic oxidation technology for purification of air and water." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38572382.

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Zazueta, Ana Luis Loo. "Modeling, design and evaluation of a multi-plate photocatalytic reactor for air purification." Thesis, University of Nottingham, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.605585.

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Indoor air pollution is a persistent problem found not only in buildings but . also in transportation vehicles, aircrafts and many other confined spaces. Photocatalytic air cleaning devices, in combination with source control and ventilation appears to be a promising method to reduce volatile organic compounds (VOCs) levels, which are among the most abundant indoor air pollutants. A major challenge this technology faces, is poor catalyst illumination efficiency. In general, effective photon utilization is a critical factor in determining the economic feasibility of a particular photocatalytic reactor design. A deficient use of light within a photocatalytic reactor will inherently lead to high operational costs, which in turn, will prevent the reactor to be implemented especially in cases in which catalyst activity is low. Consequently, the analysis of the radiation field in photocatalytic reactors is an essential step towards the optimization of photocatalytic air cleaners. This study focuses on the analysis and optimization of the geometry and radiation field in a multi-plate photocatalytic reactor (MPPR) irradiated by cylindrical UV lamps orthogonal to the plates, a reactor virtually not studied before. The MPPR aims to provide not only high light utilization, but also low pressure drop while treating large volumes of air. The MPPR presents a large photocatalyst surface area as well as a modular design, which facilitates scale up. All these characteristics could make the MPPR a costeffective alternative for indoor air remediation. The optimum design was validated by the oxidation of toluene in a humidified air stream. In addition, the performance of the reactor was evaluated with close to real concentrations using mixtures of trichloroethylene, ethanol, acetone, hexane and toluene.
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"Application of zeolite and titanium dioxide in the treatment of environmental contaminants." 1999. http://library.cuhk.edu.hk/record=b5889851.

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by Hei Yuk Kwan.
Thesis (M.Phil.)--Chinese University of Hong Kong, 1999.
Includes bibliographical references (leaves 81-87).
Abstract also in Chinese.
ABSTRACT --- p.i
DECLARATION --- p.ii
ACKNOWLEDGEMENT --- p.iii
TABLE OF CONTENTS --- p.iv
LIST OF TABLES --- p.vi
LIST OF FIGURES --- p.vii
Chapter CHAPTER ONE : --- INTRODUCTION --- p.1
Chapter 1.1 --- Background --- p.1
Chapter 1.1.1. --- Volatile Organic Compounds --- p.1
Chapter 1.1.2. --- Photocatalytic Oxidation --- p.2
Chapter 1.1.3. --- Adsorption --- p.4
Chapter 1.2. --- Scope of Work --- p.8
Chapter CHAPTER TWO : --- PHOTOCATALYSIS --- p.10
Chapter 2.1 --- Fundamental --- p.10
Chapter 2.2. --- Experimental --- p.14
Chapter 2.2.1. --- Materials --- p.14
Chapter 2.2.2. --- Instruments --- p.14
Chapter 2.2.3. --- Experimental Conditions --- p.19
Chapter 2.2.4. --- Procedure --- p.20
Chapter 2.3. --- Results and Discussion --- p.28
Chapter 2.3.1. --- Photocatalytic Degradation of DCE --- p.28
Chapter 2.3.2. --- Photocatalytic Degradation of TCE --- p.31
Chapter 2.3.3. --- Photocatalytic Degradation of DCE and TCE Binary System --- p.34
Chapter 2.3.4. --- Photocatalytic Degradation of Ethyl Acetate --- p.39
Chapter 2.3.5. --- Photocatalytic Degradation of Methyl Isopropyl Ketone --- p.41
Chapter 2.3.6. --- Photocatalytic Degradation of Ethyl Acetate and Methyl Isopropyl Ketone Binary System --- p.43
Chapter CHAPTER THREE : --- ADSORPTION --- p.47
Chapter 3.1. --- Fundamental --- p.47
Chapter 3.1.1. --- Mordenite --- p.51
Chapter 3.1.2. --- Activated Carbon --- p.55
Chapter 3.2. --- Experimental --- p.58
Chapter 3.2.1. --- Materials --- p.58
Chapter 3.2.2. --- Instrument --- p.59
Chapter 3.2.3. --- Procedure --- p.60
Chapter 3.3. --- Results and Discussion --- p.65
Chapter 3.4. --- "Adsorption Isotherm of 1,3,5-trimethylbenzene on Mordenite in Aqueous Phase" --- p.70
Chapter 3.5. --- "Thermal Regeneration of 1,3,5-trimethylbenzene on Mordenite in Aqueous Phase" --- p.72
Chapter CHAPTER FOUR : --- CONCLUSION --- p.79
REFERENCES --- p.81
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"Gaseous phase photocatalytic degradation of volatile organic compounds by titanium dioxide." 1999. http://library.cuhk.edu.hk/record=b5890093.

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by Yuk-Lin Chan.
Thesis (M.Phil.)--Chinese University of Hong Kong, 1999.
Includes bibliographical references (leaves 78-83).
Abstracts in English and Chinese.
Abstract (English version) --- p.i
Abstract (Chinese version) --- p.ii
Acknowledgments --- p.iii
Table of Contents --- p.iv
List of Figures --- p.vi
List of Tables --- p.vii
Chapter 1. --- Introduction
Chapter 1.1 --- Indoor Air Pollution --- p.1
Chapter 1.2 --- Typical Treatment of Air Pollutant --- p.6
Chapter 1.3 --- Photocatalytic Degradation over Titanium Dioxide --- p.7
Chapter 1.4 --- Advantages of Titanium Dioxide as a Photocatalyst --- p.12
Chapter 1.5 --- Applications of Photocatalytic Degradation in Pollution Control --- p.14
Chapter 1.5.1 --- Aqueous Phase Decontamination --- p.15
Chapter 1.5.2 --- Gas Phase Decontamination --- p.15
Chapter 1.6 --- Development of the Photocatalytic Degradation Technique --- p.16
Chapter 1.6.1 --- Pure Ti02 --- p.17
Chapter 1.6.2 --- Design of the Reactors --- p.18
Chapter 1.6.3 --- Metal Ion Dopants --- p.21
Chapter 1.6.4 --- Mixture with Supports --- p.21
Chapter 1.7 --- Adsorbent-Supported Titanium Dioxide --- p.22
Chapter 1.7.1 --- Use of Adsorbents other than Zeolites --- p.22
Chapter 1.7.2 --- Use of Zeolites --- p.25
Chapter 1.8 --- Molecular Sieves --- p.29
Chapter 2. --- Experimental
Chapter 2.1 --- Block diagram of the Reaction Setup --- p.31
Chapter 2.2 --- Fixed Volume Batch Reactor --- p.32
Chapter 2.3 --- Reagents --- p.34
Chapter 2.3.1 --- Degussa P25 Ti02 powder --- p.34
Chapter 2.3.2 --- Aldrich Molecular Sieves (Organophilic) --- p.35
Chapter 2.3.3 --- Other Adsorbents Used for Comparison --- p.35
Chapter 2.4 --- Instrumental Analysis --- p.36
Chapter 2.4.1 --- Photoacoustic Multi-gas Monitor --- p.36
Chapter 2.4.2 --- X-Ray Diffraction Analysis --- p.42
Chapter 2.4.3 --- Scanning Electron Microscopy --- p.42
Chapter 2.4.4 --- UV-vis Diffuse Reflectance Spectroscopy --- p.42
Chapter 2.4.5 --- Iso-electron Point Measurements --- p.43
Chapter 2.5 --- Photocatalytic Degradation of Simple Alkanes by P25 Titanium Dioxide --- p.45
Chapter 2.6 --- Photocatalytic Degradation of Gaseous Acetone over Organophilic Molecular Sieves-Supported Titanium Dioxide --- p.49
Chapter 3. --- Results and Discussion
Chapter 3.1 --- Photocatalytic Degradation of Simple Alkanes by P25 Titanium Dioxide --- p.52
Chapter 3.1.1 --- Rate of Photocatalytic Degradation of Simple Alkanes --- p.52
Chapter 3.1.2 --- Summary of Rate of Photocatalytic Degradation of Simple Alkanes --- p.57
Chapter 3.2 --- Photocatalytic Degradation of Gaseous Acetone over Organophilic Molecular Sieves-Supported Titanium Dioxide --- p.58
Chapter 3.2.1 --- The Adsorption Ability of Various Adsorbents --- p.58
Chapter 3.2.2 --- XRD Pattern Measurement --- p.60
Chapter 3.2.3 --- Scanning Electron Microscopy --- p.64
Chapter 3.2.4 --- UV-vis Diffuse Reflectance Spectroscopy --- p.65
Chapter 3.2.5 --- Iso-electron Point Measurements --- p.67
Chapter 3.2.6 --- Photocatalytic Activity of Various Catalysts --- p.69
Chapter 4. --- Conclusion --- p.76
Bibliography --- p.78
Appendix
"A Demonstration of Photocatalytic Degradation by Gaseous Organic Pollutant, Dichloromethane " --- p.83
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Chen, Chun-Chi, and 陳狀琦. "Application of Nano Photocatalyst on the Air Purification." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/kvxwjh.

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碩士
國立臺灣科技大學
營建工程系
94
Nano Photocatalyst is well known as an air purification material, such as formaldehyde and ammonia. A powerful device composed by nano photocatalyst is designed in the research to purify the air. A series of experimental parameters are set up to investigate the function of the device which included contact surface area of nano photocatalyst, concentration of formaldehyde, power of light source, speed of air and media of nano photocatalyst. The followings are the short description of the result of this research: 1. The higher the contact area of the surface of nano photocatalyst the higher air purification; 2. The higher concentration of formaldehyde the higher air purification; 3. The higher the power of light the higher air purification. A pattern is successfully applied to apply the result of this research on the real commercial product. The pattern is a fan modified by the proposed device to gain a additional function of air purification.
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Lin, Hsiu-Chen, and 林綉禎. "Application of Nano Photocatalyst Porous Concrete on Air Purification." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/up2452.

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碩士
國立臺灣科技大學
營建工程系
95
The environmental purify has become the most important issue among all the countries. The nano-photocatalyst has the ability to improve the environmental problem such as air pollution. At present, due to no side effect occur the nano-photocatalyst has widely applied to air purification. The study focus on application of Photocatalyst combines with the porous concrete as outdoor air purification material to solve the air pollution problem of Taiwan. To evaluate the photocatalysts reaction under conditions of low humidity and room temperature, the three variables, air voids of porous concrete, intensity of UV light, and factor of SiO2, were considered. Moreover, the reversion efficiency was investigated by perform the water clean method. The test results show that amount of adsorption of NO2 is affected by box wall and porous concrete. Thus, the degradation speed of initial stage is faster then later stage. As expected, the high intensity UV light result in a high photocatalysts reaction. The test result shows that before water clean the porous concrete has faster degradation speed than after water clean one. However, the reversion efficiency for each test groups has upward to 80%. Furthermore, the porous concrete that surface treating by SiO2 and then coating nano-photocatalyst has high degradation performance. Therefore, the middle layer as SiO2 can helps the long term durability. The nano-photocatalyst of situations of film formation and adhesion is affected by the air voids of porous concrete, and result in different photocatalysts reaction. Based on test results indicating the air voids of porous concrete at 15% and 20% have excellent ability of air purification. In according the statistical analysis show that 20% air voids was recommended to be the appropriate air voids contend.
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Lin, Chih-Chung, and 林志忠. "Performance Analysis of Intelligent Heat Recovery and Photocatalyst Integration Air Purification System." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/03494627138501321842.

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碩士
國立勤益科技大學
冷凍空調系
102
This study constructed a heat recovery and photocatalyst integration air purification system in a residence. Releasing some liquid volume of aromqtic or furniture detergent into the house to generate indoor VOC sources .Besides, one or two persons act in the house in order to accumulate the CO2 concentration in the house .While CO2 sensors detect the CO2 concentration in the house exceeding the recommend indoor standard value, the total heat exchanger is activated by a controller to induce outdoor fresh air and remove the indoor pollute air with a suitable flow rate. While TVOC sensors detect the VOC concentration in the house exceed the recommend standardvalue , the TiO2 photocatalyst air purification system is actived in order to degrade the indoor VOC concentration effectively .
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Books on the topic "Air Purification Photocatalysis"

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Photochemical purification of water and air. Weinheim: Wiley-VCH, 2003.

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Fujishima, Akira. Hikari kurīn kakumei: Sanka chitan hikari shokubai ga katsuyakusuru /cFujishima Akira, Hashimoto Kazuhito, Watanabe Toshiya kyōcho. Tōkyō-to Chiyoda-ku: Shīemushī, 1997.

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F, Ollis David, and Al-Ekabi H, eds. Photocatalytic purification and treatment of water and air: Proceedings of the 1st International Conference on TiO₂ Photocatalytic Purification and Treatment of Water and Air, London, Ontario, Canada, 8-13 November, 1992. Amsterdam: Elsevier, 1993.

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International Conference on TiO2 Photocatalytic Purification and Treatment of Water and Air (1st 1992 London, Ont.). Photocatalytic purification and treatment of water and air. Amsterdam: Elsevier, 1993.

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Oppenländer, Thomas. Photochemical Purification of Water and Air: Advanced Oxidation Processes (AOPs): Principles, Reaction Mechanisms, Reactor Concepts. Wiley-VCH, 2003.

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Center for Environmental Research Information (U.S.), ed. Handbook: Advanced photochemical oxidation processes. Cincinnati, Ohio: Center for Environmental Research Information, National Risk Management Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1999.

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Bruce, Raupp Gregory, Turchi Craig, and Superfund Innovative Technology Evaluation Program (U.S.), eds. Integration of photocatalytic oxidation with air stripping of contaminated aquifers. [Washington, D.C.?]: U.S. Environmental Protection Agency, Superfund Innovative Technology Evaluation, 1999.

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United States. National Aeronautics and Space Administration., ed. Fourth semiannual progress report ... for "Heterogeneous photocatalytic oxidation of atmospheric trace contaminants". Raleigh, NC: Chemical Engineering Dept., North Carolina State University, 1993.

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United States. National Aeronautics and Space Administration., ed. Fourth semiannual progress report...for heterogeneous photocatalytic oxidation of atmospheric trace contaminants. [Washington, D.C: National Aeronautics and Space Administration, 1993.

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Jose, Peral, and Ames Research Center, eds. Heterogeneous photocatalytic oxidation of atmospheric trace contaminants: First semiannual progress report. Raleigh, NC: Chemical Engineering Dept., North Carolina State University, 1991.

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Book chapters on the topic "Air Purification Photocatalysis"

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Beeldens, Anne, Luigi Cassar, and Yoshihiko Murata. "Applications of TiO2 Photocatalysis for Air Purification." In Applications of Titanium Dioxide Photocatalysis to Construction Materials, 23–35. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1297-3_5.

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Boumahdi, Meryeme, and Chaker El Amrani. "Outdoor Air Purification Based on Photocatalysis and Artificial Intelligence Techniques." In Innovations in Smart Cities Applications Edition 2, 94–103. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11196-0_10.

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Lekshmi, Mohan V., S. M. Shiva Nagendra, and M. P. Maiya. "Heterogeneous Photocatalysis for Indoor Air Purification: Recent Advances in Technology from Material to Reactor Modeling." In Lecture Notes in Civil Engineering, 147–66. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1334-3_16.

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Wang, Xinchen, and Xianzhi Fu. "Photocatalytic Purification of Benzene in Air." In Nanostructure Science and Technology, 451–78. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-0-387-48444-0_19.

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Martyanov, Igor N., and Kenneth J. Klabunde. "Photocatalytic Purification of Water and Air over Nanoparticulate TiO2." In Nanoscale Materials in Chemistry, 579–603. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470523674.ch17.

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Leung, Michael K. H., and C. W. Yiu. "Design Optimization of Photocatalytic Glass Tubular Honeycomb Reactor for Air Purification." In Proceedings of ISES World Congress 2007 (Vol. I – Vol. V), 441–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75997-3_78.

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Kudo, Takeshi, Yuko Kudo, Akira Hasegawa, and Masakazu Anpoanpo. "Development of Highly Active Titanium Oxide Photocatalysts Anchored on Silica Sheets and their Applications for Air Purification Systems." In Nanostructure Science and Technology, 403–13. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-0-387-48444-0_16.

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Fermoso, Jose, Benigno Sánchez, and Silvia Suarez. "Air purification applications using photocatalysis." In Nanostructured Photocatalysts, 99–128. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-817836-2.00005-3.

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Boumahdi, Meryeme, Chaker El Amrani, and Siegfried Denys. "An Innovative Air Purification Method and Neural Network Algorithm Applied to Urban Streets." In Research Anthology on Artificial Neural Network Applications, 1313–33. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-2408-7.ch064.

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In the present work, multiphysics modeling was used to investigate the feasibility of a photocatalysis-based outdoor air purifying solution that could be used in high polluted streets, especially street canyons. The article focuses on the use of a semi-active photocatalysis in the surfaces of the street as a solution to remove anthropogenic pollutants from the air. The solution is based on lamellae arranged horizontally on the wall of the street, coated with a photocatalyst (TiO2), lightened with UV light, with a dimension of 8 cm × 48 cm × 1 m. Fans were used in the system to create airflow. A high purification percentage was obtained. An artificial neural network (ANN) was used to predict the optimal purification method based on previous simulations, to design purification strategies considering the energy cost. The ANN was used to forecast the amount of purified with a feed-forward neural network and a backpropagation algorithm to train the model.
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Rafique, Muhammad Shahid, Muhammad Bilal Tahir, Muhammad Rafique, and M. Shakil. "Photocatalytic nanomaterials for air purification and self-cleaning." In Nanotechnology and Photocatalysis for Environmental Applications, 203–19. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-821192-2.00012-7.

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Conference papers on the topic "Air Purification Photocatalysis"

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Hou, Haiyan, Dongsheng Zhu, and Jun Cheng. "Application of Nanometer TiO2 Photocatalysis Material in Air Purification." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21255.

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The production of oil mist in machinery processing workshop is harmful. To control concentration of oil mist, the TiO2 which can treat with manifold organic pollutants is used to purify oil mist. At first, the nanometer TiO2 is prepared using the sol-gel method on the optimum formulation that showed a higher activity. Then it is treated by dip-coating technique using the non-woven fabric as composite support. The efficiency of suppression of oil mist is compared with ordinary materials. With the increase of time, the purification of the nanometer TiO2 photocatalyst sieve against oil mist of non-woven fabric is investigated in solar radiation at room temperature. It oxidizes pollutants of oil mist to CO2 and H2O. The experiments demonstrat oil mist is oxidized on the TiO2 sol at the 22nd minute with a maximum capacity of 0.3219g. It infers from the experiments the photodegradation effect is high and the reaction is fast. It also concludes that the nanometer TiO2 photocatalysis material is an ideal material for suppressing oil mist in air. At last, a status the application of technology in air purification as well as its problems and trends are presented. The technique has a promising prospect to solve the increasing air problem of the workshop.
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Lu, Yuanwei, Dinghui Wang, and Chongfang Ma. "Study on Effects of Nano-Photocatalysis and Non-Thermal Plasma on the Removal of Indoor HCHO." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18510.

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Photocatalysis is an emerging and promising technology for indoor air purification. This photocatalytic oxidation (PCO) method is effective in the case of a higher pollutant concentration, but its wide application in indoor air purification is limited due to the low level of indoor air contaminants. In order to improve the removal of pollutants in indoor air, we have evaluated the photocatalytic performance over the nanosized TiO2 particles immobilized on the surface of an activated carbon (AC) filter for the removal of formaldehyde (HCHO). However the pollutant removal capacity is low at the low level of indoor HCHO over the TiO2/AC film because the predominant influence of residence time during this reaction. In order to improve the photocatalytic removal amount of formaldehyde (HCHO) in indoor air, we studied the combining effect of photocatalysis technology with a non-thermal plasma (NTP) technology on the removal of in door HCHO. Two different plasma electrode configurations, that is wire-to-plate and needle-to-plate electrode configuration, were built and the removal of HCHO was studied by experiment. The experimental results showed that the wire-to-plate electrode configuration is more effective for the HCHO removal than the needle-to-plate electrode configurations. The experimental results using wire-to-plate electrode configuration showed that the removal of HCHO can be enhanced and the removal amount of indoor HCHO can be improved by the combination of PCO and NTP and the combination of PCO and NTP showed the synergetic effect for the indoor HCHO removal. So the combination of PCO and NTP might be a good route for the practical application of photocatalytic technology in indoor air purification.
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Lu, Yuanwei, Chongfang Ma, Wencai Li, Jianping Sheng, and Wei Wang. "The Study of Photocatalytic Degradation of Formaldehyde Under the Action of Mass Transfer." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21025.

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Photocatalysis is an emerging and promising technology for indoor air purification, which has the higher reaction rate at the higher pollutant concentration and vice versa, and the toxic intermediate products were produced meantime. However, the concentration of indoor pollutant is usually very low. So how to improve the photocatalytic reaction rates in indoor contaminant levels in building and to eliminate the intermediate toxic products are the keys of commercialization of this technology. This paper immobilized the TiO2 on the active carbon and analyzed the effect of mass transfer due to the absorption of AC on the photocatalytic reaction rate. The experimental results shown that the photocatalytic reaction rate was improved for the local concentration of contaminants on the surface photocatalyst TiO2 was enhanced by adsorbent activated carbon. With the increase of air stream velocity, the photocatalytic reaction switched from mass transfer control process to photocatalytic reaction control process. The switch point was advanced for the absorption of AC comparing with TiO2 immobilized on the surface of glass. The indoor formaldehyde with low level concentration can be decomposed to the range of indoor air quality standards by the TiO2/AC filter.
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Wang, Nan, Zhijiang Wu, and Gongsheng Zhu. "Experimental Study of Nanometer TiO2 Photocatalysis Material in Air Purification." In 2009 International Conference on Energy and Environment Technology. IEEE, 2009. http://dx.doi.org/10.1109/iceet.2009.480.

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Ding, Cong, Yufei Zhang, Chen Chuan, and Yanhua Liu. "Preparation and Photocatalysis of a Glass Coated With Nanometer TiO2 Codoped With N, F and Fe Elements." In ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/mnhmt2016-6424.

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Indoor air pollution seriously threats the life and health of human beings. The improvement of indoor air quality has become a focus that people pay more and more attentions to. The photocatalytic of pollutants based on TiO2 is a promising air purification technology. In order to overcome the disadvantages of nanometer powder TiO2 catalyst and to enhance the photocatalytic activity of TiO2, series of glass plates covered with doped-TiO2 were prepared and the photocatalysis them were studied. The glass plates covered with TiO2 which was doped in advance with N, F, or/and Fe were prepared by a sol-gel method. The doping content of N, F, Fe and heat treatment temperature were determined using the orthogonal array of the Taguchi quality design. The prepared gel was coated on the glass by spin-coating method. The effects of doping level of N, F and Fe and heat treatment temperature on the photocatalytic capabilities were investigated. The photocatalytic capabilities of prepared glass plates were investigated by degrading the solution of methylene blue (MB,C16H18ClN3S). The results show that appropriate addition of N, F and Fe and temperaturae are effective for improving the photocatalytic activities of TiO2 under visible light. The optimal TiO2 was prepared under the condition that the doping amount of F element was 9at %, that of N is 7at %, and none of Fe under 400 °C calcination temperature. The degradation rate of the sample for methylene blue solution reaches 23.49% under visible light irradiation for 5 hours. The influence order of the factors was the calcination temperature > F > N > Fe.
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Yang, Ting, Yufei Zhang, Lijuan Ma, and Yanhua Liu. "Ceramic Tile With Air Purification Capability." In ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/mnhmt2016-6431.

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In recent years, with the social progress and the rising of living standard, people have realized the importance of clean air. Microscale or nanometer photocatalyst has a certain application advantages in the purification of pollutants. Nano-TiO2 is one of novel promising environmental-friendly catalytic materials. However, the, only can absorb ultraviolet irradiation which accounts little in sunlight. Co-doping is beneficial in modifying TiO2. The synergistic action of dopants not only increased the activity of photocatalytic degradation, but also expanded the response range of light to the visible light region. Ceramic tile is a kind of common building material, and has broad application to the outside and inside wall of buildings for decoration. If we carry nanometer TiO2on ceramic tiles, they can clear pollutants in indoor and outdoor air. In this study, we prepared a TiO2 photocatalytic gel in advance by doping amount of N, F and/or Fe. Then we coated the gel on a kind of ceramic tile. After calcination we prepared a special ceramic tile with TiO2. The TiO2 was co-doped with N, F and Fe elements. The photo-catalytic activities of the ceramic tile samples under visible light irradiation were evaluated by the degradation of methylene blue solution. The result showed that the photocatalytic activity of the ceramic tile co-doped with TiO2 doped with 4wt % N, 0.06 wt% Fe, 0 wt% F, calcinated at 500°C, was the highest. The influence order of the factors was calcination temperature >Fe >F> N.
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Graf, John C., Prashant S. Chintawar, and J. R. Kittrell. "Photocatalytic Purification of Spacecraft Air: Ethylene Destruction." In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1998. http://dx.doi.org/10.4271/981803.

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Liu, Baojiang, Xubang Cheng, and Jinxin He. "Zn²+-La³+ Co-Doped TiO2 Photocatalyst for the Purification of Air." In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2009). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5163771.

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Lin, Hao. "Research of concentrated photovoltaic photothermal photocatalytic air purification system based on activated carbon thermal regeneration." In XVI INTERNATIONAL CONFERENCE ON LUMINESCENCE AND LASER PHYSICS DEVOTED TO THE 100TH ANNIVERSARY OF IRKUTSK STATE UNIVERSITY. Author(s), 2019. http://dx.doi.org/10.1063/1.5089047.

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Yu, Huili, Kaili Zhang, and Carole Rossi. "Theoretical Investigation on Nano TiO2 Photocatalytic Oxidation of VOCs." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21406.

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Controlling mechanisms for photocatalytic degradation of volatile organic compounds by nano TiO2 catalyst are found to be mass transfer, diffusion, adsorption and photochemistry. A mathematical model for the degradation process is developed by incorporating these mechanisms in a plane plate air purification physical model. Finite difference method is employed to solve the governing equation and boundary conditions. The computation results are validated using the data from experiments. The model is then used to investigate the effects of some key factors on the degradation of formaldehyde including UV light intensity, UV light attenuation coefficient, adsorption, catalyst thickness, and flow rate.
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