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Rozprawy doktorskie na temat „Photocatalysts”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

He, Jijiang. "Preparation and photocatalysis of graphite carbon nitride based photocatalysts." Thesis, Curtin University, 2015. http://hdl.handle.net/20.500.11937/521.

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The connection between ritual and the interior is interrogated through a theoretical framework integrating Van Gennep’s Rites of Passage Theory and Turner’s Theory of Liminality. A multi-faceted methodological framework is developed from the interrogation of the disciplinary edges of multiple methodologies, addressing the experiential, cultural and subjective dimensions of ritual. This new way of exploring the interior demonstrates how knowledge can be acquired from the body’s immersion in unfolding ritual situations, revealing elements of ritual and interior in relation to one another and the

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2

Lee, Soo-Keun. "Laser photocatalysts." Thesis, Robert Gordon University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.344019.

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Svoboda, Jiří. "Flavin-based photocatalysts." kostenfrei, 2007. http://www.opus-bayern.de/uni-regensburg/volltexte/2008/859/.

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Vaisman, Elena. "Characterization of composite photocatalysts." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0015/MQ49661.pdf.

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Kent, Laura. "Photocatalysts for water purification." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/850035/.

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Advanced water purification methods are required to answer the growing demand for clean water throughout the world. Current methods of removing the pollutants rely on moving the pollutants from one place to another rather than breaking them down. The use of advanced oxidative processes (AOPs) presents a highly effective opportunity to achieve the full mineralisation of pollutants without the added cost of regeneration methods. Photocatalysts, such as titanium dioxide and zinc oxide, can be used as AOPs when activated by electromagnetic radiation in the form of ultraviolet and visible light. To

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Trofimovaite, Rima. "Nanostructured promoted titania photocatalysts." Thesis, Aston University, 2018. http://publications.aston.ac.uk/37498/.

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Concern over the economics of accessing fossil fuel and widespread acceptance of the anthropogenic origin of rising CO2 emissions and associated climate change is driving academic and commercial research into new routes to sustainable fuels, to meet the demands of a rapidly rising global population and reduce an impact on the environment. The titania oxide semiconductor has attracted a great interest as a photocatalyst for wide-ranging applications including wastewater depollution, solar fuels via both H2 production and CO2 reduction. Tailoring the physicochemical properties of titania photoca

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Daniel, Lisa Maree. "Laponite-supported titania photocatalysts." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16669/3/Lisa_Daniel_Thesis.pdf.

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This thesis describes the synthesis and characterisation of titania photocatalysts for incorporation into a polyethylene film. Monodisperse, anatase-phase titania nanoparticles are prepared and the synthesis conditions necessary for attraction to a laponite clay support are determined. Methods of preventing agglomeration of the laponite system such as the use of a polyethylene oxide surfactant or chemical modification of the laponite plate edges with a dimethyloctyl methoxysilane are also explored. Finally, photocatalytic studies on the laponite-supported titania nanoparticles are performed,

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Daniel, Lisa Maree. "Laponite-supported titania photocatalysts." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16669/.

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This thesis describes the synthesis and characterisation of titania photocatalysts for incorporation into a polyethylene film. Monodisperse, anatase-phase titania nanoparticles are prepared and the synthesis conditions necessary for attraction to a laponite clay support are determined. Methods of preventing agglomeration of the laponite system such as the use of a polyethylene oxide surfactant or chemical modification of the laponite plate edges with a dimethyloctyl methoxysilane are also explored. Finally, photocatalytic studies on the laponite-supported titania nanoparticles are performed,

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9

Day, Nicholas Upton. "Polymeric Porphyrins as Solar Photocatalysts." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2625.

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Research concentrated on the absorption, transformation, and storage of light energy is useful for the energy challenges faced by humanity. In particular, photocatalysis using solar energy to generate useful fuels has become a primary research goal in the drive to replace fossil fuels for the future. In this dissertation it is shown that poly-tetra(4-aminophenyl)porphyrin (pTAPP) can be oxidatively polymerized using a variety of methods, including electropolymerization, chemical oxidation, and interfacial polymerization and that pTAPP has photocatalytic ability to reduce O2 to H2O2 for a stora

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10

Ran, Rong. "Preparation and Optimization of Novel Visible-Light-Active Photocatalysts for Waste-Water Treatment." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34152.

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Photocatalysis is a series of advanced light-induced redox reaction processes resulting in the degradation and mineralization of organic pollutants in the presence of oxygen and water. Due to their capability to destroy contaminants under mild conditions, photocatalytic processes have attracted considerable attention in the field of waste-water treatment. However, photocatalytic reactions using the traditional TiO2 photocatalyst suffer from low energy efficiencies under solar irradiation. This low efficiency in the utilization of solar energy lies in its incapability in absorbing visible light

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11

Szczepankiewicz, Steven Henry Hoffmann Michael R. "Surface chemistry of titanium dioxide photocatalysts /." Diss., Pasadena, Calif. : California Institute of Technology, 2001. http://resolver.caltech.edu/CaltechETD:etd-05232006-094537.

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12

Uddin, Md Tamez. "Metal oxide heterostructures for efficient photocatalysts." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00879226.

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Photocatalytic processes over semiconducting oxide surfaces have attracted worldwide attention aspotentially efficient, environmentally friendly and low cost methods for water/air purification as well as forrenewable hydrogen production. However, some limitations to achieve high photocatalytic efficiencies havebeen found due to the fast recombination of the charge carriers. Development of heterostucture photocatalystsby depositing metals on the surface of semiconductors or by coupling two semiconductors with suitable bandedge position can reduce recombination phenomena by vectorial transfer of

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13

Locke, Ashley. "Morphological investigations of supported titania photocatalysts." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/38904/1/Ashley_Locke_Thesis.pdf.

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Due in no small part to an increasing need to augment existing water purification strategies, the synthesis of titania photocatalysts has been under considerable examination. However, in order to make the use of titania photocatalysts commercially viable there needs to be an increase in the efficiency of the catalysts while decreasing the potential toxicity. Due to its high porosity and novel optical properties, inverse opal titania derived from colloidal crystal templating offers one of the most efficient solutions. While a number of synthesis methods for inverse opal titania have been presen

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14

Hathway, Timothy Lee. "Titanium dioxide photocatalysis studies of the degradation of organic molecules and characterization of photocatalysts using mechanistic organic chemistry /." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3369929.

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15

Yamamoto, Akira. "Studies on Low-temperature De-NoX System over TiO2-based Photocatalysts." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/200501.

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16

Wang, Fan. "Visible light photocatalysis with supported metal nanoparticles for organic synthesis." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/103567/1/Fan_Wang_Thesis.pdf.

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This project was a step forward in developing new effective photocatalysts for fine organic synthesis under visible light irradiation. These kind of new photocatalysts are able to facilitate reaction rates by using visible light under moderate reaction conditions through a green, economical and environmentally friendly pathway. This thesis investigated the catalyst synthesis, characterization and the application in organic reactions with high activity and selectivity. The discovery of these new metal nanoparticle photocatalysts may inspire further studies on other efficient photocatalysts and

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17

Rhydderch, Shona. "Spectroscopic studies of photocatalysts for organic synthesis." Thesis, University of Aberdeen, 2014. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=215112.

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18

Marszewski, Michal. "Development of highly porous crystalline titania photocatalysts." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1476281107453411.

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19

Rico, Santacruz Marisa. "Band gap control in hybrid titania photocatalysts." Doctoral thesis, Universidad de Alicante, 2014. http://hdl.handle.net/10045/42201.

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20

Amorós-Pérez, Ana. "TiO2 based photocatalysts for environmental remediation reactions." Doctoral thesis, Universidad de Alicante, 2019. http://hdl.handle.net/10045/92551.

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Esta tesis doctoral se ha centrado en la preparación de fotocatalizadores nanoestructurados basados en TiO2 modificados con metales de transición o carbón activado para su aplicación en reacciones de interés medioambiental, concretamente, en la eliminación de tres contaminantes: ácido acético y diurón, en fase acuosa, y propeno en fase gas. Se ha estudiado la influencia de las propiedades fisicoquímicas (porosidad, cristalinidad, composición química, propiedades electrónicas) de cada material en su actividad fotocatalítica.

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21

Paul, Blain. "Nanostructured metal oxides as adsorbents and photocatalysts." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/41758/1/Blain_Paul_Thesis.pdf.

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This research underlines the extensive application of nanostructured metal oxides in environmental systems such as hazardous waste remediation and water purification. This study tries to forge a new understanding of the complexity of adsorption and photocatalysis in the process of water treatment. Sodium niobate doped with a different amount of tantalum, was prepared via a hydrothermal reaction and was observed to be able to adsorb highly hazardous bivalent radioactive isotopes such as Sr2+ and Ra2+ions. This study facilitates the preparation of Nb-based adsorbents for efficiently removing tox

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22

Huang, Yiming. "New plasmonic photocatalysts for fine organic synthesis." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/116809/1/Yiming_Huang_Thesis.pdf.

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Using visible light to accelerate fine organic synthesis reactions in the presence of photocatalyst is a step forward to the green chemical industry. This thesis developed gold, gold-palladium alloy and copper photocatalysts. Aqueous reactions system is introduced into photocatalysis for an eco-friendly process. The bi-metal nanoparticle is applied to expand the application of metallic photocatalysis in selective synthesis. The theory for copper nanostructure stabilisation on metal nitride is established and successfully applied in organic synthesis. This research is beneficial to the future o

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23

Méndez, Medrano Ana Andrea. "Photocatalysts for Hydrogen Generation and Wastewater Treatment." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASF074.

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Le développement durable est essentiel pour relever les défis énergétiques et environnementaux. La photocatalyse constitue une alternative viable pour convertir et stocker l'énergie solaire sous forme de carburants tels que l'hydrogène (H₂), tout en contribuant à la réduction des émissions de dioxyde de carbone (CO₂) et à la dégradation des polluants dans l'air et l'eau. La conception de photocatalyseurs efficaces, rentables et stables est essentielle pour faire progresser les technologies de conversion de l'énergie solaire. Le dioxyde de titane (TiO₂) est le photocatalyseur le plus couramment

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24

Hanumanth, Rao C. "Semiconductor Photocatalysts For The Detoxification Of Water Pollutants." Thesis, Indian Institute of Science, 2000. http://etd.iisc.ac.in/handle/2005/216.

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Water pollution is a major concern in vast countries such as India and other developing nations. Several methods of water purification have been practiced since many decades, Semiconductor photocatalysis is a promising technique, for photodegradation of various hazardous chemicals that are encountered in waste waters. The great significance of this technique is that, it can degrade (detoxify) various complex organic chemicals, which has not been addressed by several other methods of purification. This unique advantage made this field of research to attract many investigators particularly in la

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Hanumanth, Rao C. "Semiconductor Photocatalysts For The Detoxification Of Water Pollutants." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/216.

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Water pollution is a major concern in vast countries such as India and other developing nations. Several methods of water purification have been practiced since many decades, Semiconductor photocatalysis is a promising technique, for photodegradation of various hazardous chemicals that are encountered in waste waters. The great significance of this technique is that, it can degrade (detoxify) various complex organic chemicals, which has not been addressed by several other methods of purification. This unique advantage made this field of research to attract many investigators particularly in la

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26

Wang, Zheng. "Studies on the Photocatalytic Conversion of CO2 in and by H2O over Heterogeneous Photocatalysts." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199324.

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Xing, Congcong. "TiO2-based heterostructure photocatalysts for enhanced hydrogen production." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/672368.

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The photocatalytic production of hydrogen from water and biomass derivatives such as ethanol, glycerol and sugars is a highly attractive strategy to generate environmentally benign hydrogen. Ethanol is more easily oxidized than water by holes in the valence band (VB) of photoexcited semiconductors, which also helps to suppress the recombination of electron-hole pairs, thus increasing the usage of electrons in the conduction band (CB) of photoexcited semiconductors to yield hydrogen. Titanium dioxide (TiO2) has been widely investigated in the field of photocatalysis due to its photosensitivit

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Wu, Zhiqing. "Nanocarbon-based Photocatalysts: rGO/Metal Oxides Composite Membranes." Thesis, Griffith University, 2017. http://hdl.handle.net/10072/371317.

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It is widely accepted that graphene as well as reduced graphene oxide (rGO) have shown many superior properties such as electron mobility, excellent thermal and electrical conductivity, and large theoretical specific surface area. Previous research has shown significant enhancement of the photocatalytic property of semiconductors by compositing with rGO, which was largely attributed to the function of rGO or graphene as the electron sink. Moreover, the incorporation of graphene in photocatalytic systems also renders new format and new properties to photocatalysts. This MPhil project focuses on

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Morton, Craig D. "Development of novel photocatalysts for solar hydrogen production." Thesis, University of Greenwich, 2012. http://gala.gre.ac.uk/3630/.

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Photocatalysts, typically nanoparticulate semiconductors, can be used to split water into hydrogen and oxygen. If solar light is used for this, it opens the possibility of a renewable source of hydrogen. However, extension of photocatalytic response into the visible region of the solar spectrum is required. A new visible light activated photocatalyst is reported herein. Iron vanadate, FeVO4, was first synthesised using a low-temperature, aqueous precipitation reaction. The material prepared was found to be predominantly amorphous and required thermal treatment. The resultant material was chara

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Amsaaed, Salem. "Copper Grafted Titanium Dioxide in Hydrogels for Photocatalysts." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2018. http://digitalcommons.auctr.edu/cauetds/155.

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This study are based on the premise that the incorporation of metal ions into nano titania-PHEMA [poly (2-hydroxyethyl methacrylate)] hydrogels would enhance the desirable properties in the photodecomposition of pollutants. The investigation are centered in the use of Cu(II) as metal ion of interest. The development of TiO2-PHEMA-Cu hydrogels was conducted, and the characterization of the materials by FT-IR, XRD and fluorescence was performed. The absorption of copper(II) from the solution was monitored by UV-Vis. The FT-IR are found too, be the most effective tool too, analyze the interaction

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Zhang, Jinqiang. "Development of nanostructured photocatalysts for solar fuels production." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2021. https://ro.ecu.edu.au/theses/2403.

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Hydrogen energy is an ideal energy resource owing to its clean and efficient utilization. As an energy carrier without natural abundance, the limited reserve makes the high consumption a big challenge. In the meantime, fossil fuels, e.g., coal, oil and gas, have been important carbon carriers in the long-term carbon cycle, but their upgrading is restricted to conventional thermocatalysis. Solar energy with the advantages of large abundance, widespread distribution, and high flux appeals extensive attention, but unfortunately is underutilized at the moment. Photocatalysis initiated with semicon

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Ramírez, Nieves P. "Visible light-promoted transformations of carboxylic acids using organic photocatalysts." Doctoral thesis, Universidad de Alicante, 2019. http://hdl.handle.net/10045/110279.

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In this doctoral thesis, we have studied the oxidation of carboxylic acids to obtain the corresponding acyloxy radicals, using visible light and non-toxic and inexpensive organic dyes, as photocatalysts. On the one hand, we study the photooxidation of aromatic carboxylic acids to obtain acyloxy radicals, whose decarboxylation is relatively slow (Chapter I and Chapter II). On the other hand, we describe the photooxidation of aliphatic carboxylic acids, to take advantage of the rapid decarboxylation of the corresponding acyloxy radicals, to generate nucleophilic radicals that were trapped by dif

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Puddu, Valeria. "Highly active TiO2-based photocatalysts for indoor air remediation." Thesis, University of Nottingham, 2008. http://eprints.nottingham.ac.uk/14577/.

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Energy saving policies applied to modem buildings and air recirculation systems promote the build up of high levels of VOCs in indoor air. The growing concern related to the air quality in indoor environments requires the replacement of ineffective traditional purification methods, with an efficient and cost effective technology. Photocatalytic oxidation that utilise TiO2, represents a promising candidate for this purpose. However, the formulation of photocatalysts that can efficiently utilise a sustainable energy source (i.e. solar light), still represents an ambitious target in this field. I

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Wu, Yabi. "Design of water-splitting photocatalysts by first principles computations." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/88377.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, February 2014.<br>Cataloged from PDF version of thesis. "October 2013."<br>Includes bibliographical references (pages 90-109).<br>This thesis focuses on the design of novel inorganic water-splitting photocatalysts for solar applications using first principles computations. Water-splitting photocatalysts are materials that can photo-catalyze the water-splitting reaction under certain conditions. They provide an alternative way to capture and store the energy from the sun. Currently, the energ

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Pesci, Federico M. "Metal oxide semiconductors employed as photocatalysts during water splitting." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24964.

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Photocatalytic water splitting has attracted significant interest in recent decades as it offers a clean and environmentally friendly route for the production of hydrogen. A key challenge remains the development of systems that employ abundant, non-toxic and inexpensive materials to dissociate water efficiently using sunlight. Titanium dioxide (TiO2), tungsten trioxide (WO3) and hematite (α-Fe2O3) are among the most studied photoanodes employed during water splitting because of the position of their valence band which is suitable for oxidising water to oxygen, and their low costs. However repo

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36

Kato, Daichi. "Crystal and band structure control of layered oxyhalide photocatalysts." Kyoto University, 2020. http://hdl.handle.net/2433/259741.

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Zhang, Huayang. "Synthesis and Evaluation of Novel Photocatalysts for Photocatalytic Reactions." Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/70286.

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This study focuses on the design of low-dimensional (LD) photocatalysts for water oxidation in oxygen evolution reaction (OER). Through skillful approaches, such as morphological control, interface construction, defect or vacancy engineering, we developed a series of LD hybrids and examined their photo- and photoelectrochemical performances in OER. Attribute to the stable LD structure and synergistic effect of the components, the heterojunction or hierarchical materials showed enhanced charge separation, transportation, water oxidation kinetics and quantum efficiency.

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Zhang, Xingguang. "Plasmonic photocatalysts of supported gold nanoparticles for organic conversions." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/67714/4/Xingguang_Zhang_Thesis.pdf.

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This thesis is a comprehensive study of plasmonic gold photocatalysts for organic conversions. It presents the advantages of plasmonic gold photocatalysts in the selective oxidation, reduction, and acetalisation. It is discovered that plasmonic gold photocatalysts exhibit better catalytic performance (higher selectivity or activity) in these organic conversions. The study in this thesis highlights the capacity of plasmonic gold photocatalysts in harvesting solar energy for converting organic raw materials to value-added chemicals, and the great potential of gold photocatalysts in chemical prod

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Han, Pengfei. "New photocatalysts for organic synthesis driven by visible light." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/120830/1/Pengfei_Han_Thesis.pdf.

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Effective visible light photocatalysts for achieving organic reactions under mild conditions are long sought after and a rarely achieved aim in modern catalyst chemistry. Here, metal complexes and plasmonic metal NPs were assembled and used systematically for the first time as a novel photocatalyst to achieve this target. The new photocatalytic system was designed, established, and proved to be efficient in driving C-O bond cleavage of lignin model compounds and sugars dehydration to produce 5-HMF under visible light irradiation.

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BRATOVCIC, Amra. "DESIGN OF HETEROGENEOUS PHOTOCATALYSTS FOR SELECTIVE OXIDATION OF ALCOHOLS." Doctoral thesis, Università degli studi di Ferrara, 2012. http://hdl.handle.net/11392/2388783.

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My doctoral activity deals with oxidative photocatalysis. This is based on the use of photosensitive materials, it employes molecular oxygen as oxidant and it operates under mild temperature and pressure conditions. In particular, I worked on the preparation and characterization of photocatalytic heterogeneous systems containing the decatungstate anion W10O324- or the complex Fe(III) meso-tetrakis (2,6-dichlorophenyl) porphyrin. The photocatalytic properties of these photocatalysts were evaluated in the selective oxidation of aliphatic alcohols. The chosen polyoxoanion and porphyrin have many

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Pang, Rui. "Development of Novel Photocatalysts and Co-catalysts for Photocatalytic Conversion of CO2 by H20." Kyoto University, 2019. http://hdl.handle.net/2433/242527.

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Gamage, McEvoy Joanne. "Carbon-enhanced Photocatalysts for Visible Light Induced Detoxification and Disinfection." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31099.

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Photocatalysis is an advanced oxidation process for the purification and remediation of contaminated waters and wastewaters, and is advantageous over conventional treatment technologies due to its ability to degrade emerging and recalcitrant pollutants. In addition, photocatalytic disinfection is less chemical-intensive than other methods such as chlorination, and can inactivate even highly resistant microorganisms with good efficacy. Process sustainability and cost-effectiveness may be improved by utilizing solar irradiation as the source of necessary photons for photocatalyst excitation. How

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Xiong, Yuli. "Mesoporous metal-oxides for dye sensitized solar cells and photocatalysts." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608338.

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The development of mesoporous titania (meso-TiO2) films is a considerable research goal in the field of mesoporous material development due to their proven applicability in solar cells and phtocatalysts. In this work, the meso-TiO2 films were fabricated through different methods and these home-made titania structures were applied in DSSCs and photocatalysts. Meso-TiO2 powders were first prepared from ethanol/water or ethanol solvent. The meso-TiO2 made from the ethanol/water solvent did not have an ordered mesostructure, but that made from ethanol solvent had 2D-hexagonal mesostructure. Films

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44

Chi-Shin, Wu, and 吳啟炘. "Adsorption and Photocatalysis Characterization of Composite Photocatalysts." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/72303660714657619981.

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博士<br>中華大學<br>科技管理學系(所)<br>96<br>The objective of this research is to obtain an optimal combination on improving the adsorption/photocatalysis capability of composite photocatalysts by means of design of experiments (DOE) and analysis of variance (ANOVA). Five control factors, including photocatalyst type, catalyst loading, support type, heat-treated temperature, and stirring speed, with four levels were considered to investigate the optimal parameter setting. The present work applied an L16 orthogonal array combined with ANOVA analysis to individually find out their improved parameters: adsor

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SU, SIN-YU, and 蘇芯褕. "Photocatalysis of Sulfadiazine by Graphene/TiO2 Composite Photocatalysts." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/rv5j7p.

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碩士<br>國立高雄第一科技大學<br>環境與安全衛生工程系碩士班<br>105<br>This study investigated liquid-phase photocatalysis of sulfadiazine(SDZ) by both titanium dioxide (TiO2) and graphene doped TiO2 (GR/TiO2) thin-film. The thin-film photocatalysts were prepared with an electrophoretic deposition (EPD) technique by immobilizing P-25 TiO2, with various amount of GR, onto pure titanium (Ti) metal plates. This study explored the effects of preparation recipes on the photocatalytic activities of prepared samples, which were determined by the degradation rate of SDZ assisted by the prepared samples irradiated with a near-UV

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Hsu, Shin-Lin, and 許世霖. "Preparations and Photocatalysis Properties of Na(K)Ta(Nb)O3 Series Photocatalysts." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/05118345134922253396.

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碩士<br>國立東華大學<br>材料科學與工程學系<br>94<br>Abstract Tantalum alkoxides (ex: NaTaO3, KTaO3) were prepared and decomposed of pure water into H2 and O2 without co-catalysts by illuminated UV light . In this study, we reported and prepared the similar niobium alkoxides (NaNbO3, KNbO3) as a new series of active photocatalytic materials. The tantalate and niobate pyrochlores were prepared by a solid state reaction with sodium or potassium hydroxide. The relative high sintering temperature (1100 oC) will caused sodium or potassium volatilization and generated the powder reaction incompletely. It will be st

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Kosco, Jan. "Organic Semiconductor Nanoparticle Photocatalysts for Hydrogen Evolution from Water." Diss., 2019. http://hdl.handle.net/10754/660322.

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Photocatalytic water splitting using solar irradiation has the potential to produce sustainable hydrogen fuel on a large scale. Practical solar energy conversion requires the development of new, stable photocatalysts that operate efficiently under a broad range of visible wavelengths. Organic semiconductors are increasingly being employed as photocatalysts due to their earth abundance, aqueous stability, and optical absorptions that can be tuned to the solar spectrum. However, much remains unknown about the mechanism of organic semiconductor photocatalysis, and significant efficiency improveme

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Chang, Yu-lun, and 張育綸. "Preparation and Characterization of TiO2 Photocatalysts." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/29505148703574583887.

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碩士<br>淡江大學<br>化學工程與材料工程學系<br>92<br>TiO2 photocatalysts were prepared using a sol-gel method. Alcoholic solution of tetraethylorthotitanite was dropped into de-ionized water, followed by refluxing the liquid at 90 oC for 3 hr. The pH of liquid was adjusted using HNO3 and NH4OH. The obtained particles were dried at 90 oC and calcined at different temperatures. The resultant calcined particles were characterized using XRD, DSC, TG, IR, BET, SEM, and TEM. Photoactivity of the obtained particles was investigated by degrading methylene blue under illumination of 365nm UV and fluorescent light. T

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Marques, Rita Ruivo Neves. "Development of hybrid TiO2/SWCNT photocatalysts." Master's thesis, 2009. http://hdl.handle.net/10216/66796.

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Uddin, Md Tamez. "METAL OXIDE HETEROSTRUCTURES FOR EFFICIENT PHOTOCATALYSTS." Phd thesis, 2014. https://tuprints.ulb.tu-darmstadt.de/4199/13/UDDIN-Second%20Revised%20PhD%20Thesis.pdf.

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Photocatalytic processes over semiconducting oxide surfaces have attracted worldwide attention as potentially efficient, environmentally friendly and low cost methods for water/air purification as well as for renewable hydrogen production. However, some limitations to achieve high photocatalytic efficiencies have been found due to the fast recombination of the charge carriers. Development of heterostucture photocatalysts by depositing metals on the surface of semiconductors or by coupling two semiconductors with suitable band edge position can reduce recombination phenomena by vectorial transf

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