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Journal articles on the topic 'Photodegradation of pollutants'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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1

Li, Xu Chun, Jun Ma, and Si Yang Yue. "Efficient Destruction of Chlorophenols by Ultraviolet Irradiation." Advanced Materials Research 476-478 (February 2012): 1955–59. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.1955.

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Chlorophenols (CPs), a group of recalcitrant and toxic pollutants, are widespread in the environment and threating human health. The environment-friendly technology, UV irradiation, could efficiently destruct CPs. The study investigated the influence of solution pH and positions and number of substituted chlorine atoms on photodegradation process of CPs, and also studied the photodegradation pathway. It found that the photodegradaton process of CPs was highly dependent on solution pH, and higher pH favored the degradation. The photodegradation processes agreed well with the pseudo-first order kinetics, and para- and ortho- positions and lower chlorination degree were more favorable for photodegradation of CPs. Most of the chlorine atoms were released as chloride ions, and suggest that the cleavage of the C-Cl bond occurred during the photodegradation process. It will provide some guidance for efficient treatment of CPs in water.
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De Luca, Pierantonio, Pasquale De Luca, Sebastiano Candamano, Anastasia Macario, Fortunato Crea, and Jànos Nagy. "Preparation and Characterization of Plasters with Photodegradative Action." Buildings 8, no. 9 (September 3, 2018): 122. http://dx.doi.org/10.3390/buildings8090122.

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The aim of this project is to investigate the behaviour of several special types plasters specifically designed to degrade the most common pollutants which are present in the atmosphere. In particular, specific additives have been added to these plasters, in order to obtain a broad spectrum of active and synergic response, each of which have peculiar functions: - microporous materials, such as clinoptilolite, a natural zeolite, that promotes the adsorption of air pollutants thanks to its porous nature; - nano-fillers, such as carbon nanotubes, that behave both as reinforcing agents as well as adsorbent materials; - photochemical agents, such as titanium oxide, that degrade air pollutants, previously adsorbed on carbon nanotubes and zeolites, thanks to the action of light that activates photodegradation reactions. All the samples were also characterized in terms of mechanical properties, adhesion to supports and water absorption. Furthermore, photodegradation tests were carried out by exposing plaster surfaces, wetted with a Rodamine solution, to Ultraviolet rays (UV) for different times. Plasters photodegradative capacity was evaluated and the results highlighted the fact that the designed admixtures showed an important photodegradative action, strictly dependent on the types and specific ratios of the selected additives.
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3

Riaz, Nadia, Mohammad Azmi Bustam, Chong Fai Kait, Zakaria B. Man, Muhammad Saqib Khan, Mohd Shariff Azmi, Biruh Shimekit, Sami Ullah, and Ali E. I. Elkhalifah. "Adsorption of Azo Dye Orange II by Supported TiO2: A Review." Applied Mechanics and Materials 625 (September 2014): 770–74. http://dx.doi.org/10.4028/www.scientific.net/amm.625.770.

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The supported TiO2 photocatalyst has been reported for the photodegradation of different organic pollutants. These supported TiO2 photocatalysts include metal and non metal doped TiO2 photocatalysts. The photodegradation can be explained in terms of adsorption. The adsorption of the dye is an significant and obvious parameter in the photodegradation process. The photodegradation is directly related to the adsorbed quantities of the pollutant onto the surface of adsorbant. Adsorption of Orange II, an azo dye has been reported using different adsorbents like fly ash, activated carbon and porous titanium dioxide. This review presents a comparison of maximum adsorption capacities (Qm; mg.g–1) and Langmuir adsorption constant (Kads; L.mg–1) for the adsorbents reported in previous studies.
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Brodzik, Krzysztof, Jerzy Walendziewski, and Marek Stolarski. "Photodegradation of organic compounds in water." Polish Journal of Chemical Technology 9, no. 3 (January 1, 2007): 130–33. http://dx.doi.org/10.2478/v10026-007-0072-1.

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Photodegradation of organic compounds in water The application of photocatalytic processes for the decontamination treatment of polluted water has inspired very extensive studies. Titanium dioxide with its large band gap energy and appropriate redox potential was found as one of the most promising semiconductors for the photodegradation of pollutants in the water as well as in gas phase. The titania-silica aerogels obtained by a simple co-hydrolysis method was applied in the photodegradation of the model organic compound. Different ageing times and heat treatment temperatures were found to influence both the activity and the textural properties of the photocatalysts. The obtained aerogels are efficient photodegradation catalysts of methylene blue and allow a removal up to 98 and 78% of the model pollutant from 20 and 500 ppm solutions, respectively.
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Mahu, Elvira, Maria Ignat, Corneliu Cojocaru, Petrisor Samoila, Cristina Coromelci, Iuliean Asaftei, and Valeria Harabagiu. "Development of Porous Titania Structure with Improved Photocatalytic Activity: Response Surface Modeling and Multi-Objective Optimization." Nanomaterials 10, no. 5 (May 23, 2020): 998. http://dx.doi.org/10.3390/nano10050998.

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Porous titania was successfully synthesized by an ultrasound-assisted sol-gel route. The synthesis process was empirically modeled and optimized using the response surface methodology (RSM). Input variables adopted for optimization dealt with the weight ratio of precursors (r) and the sonication time (t), representing the used factors in the synthesis procedure. With regard to application, the synthesized TiO2 samples were tested for the photodegradation of two water-soluble organic pollutants under UV–Vis irradiation. Optimal conditions for the efficient pollutants’ photodegradation were found to involve a precursors ratio of 3 and a sonication time of 60 min. Thus, the M5 sample prepared under the founded optimal conditions yielded the maximal removal efficiencies of 98.4% and 46.3% for the photodegradation of CR dye and 2,4-D herbicide, respectively. In addition, the photodegradation kinetics revealed the pseudo first-order rate constants, showing the photodegradation of CR (k1 = 8.86 × 10−2 min−1) by M5 sample is about 1.3-fold faster than the photodegradation of 2,4-D pesticide (k2 = 6.84 × 10−2 min−1).
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6

Vione, Davide. "Insights into the Time Evolution of Slowly Photodegrading Contaminants." Molecules 26, no. 17 (August 28, 2021): 5223. http://dx.doi.org/10.3390/molecules26175223.

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Photochemical degradation plays an important role in the attenuation of many recalcitrant pollutants in surface freshwaters. Photoinduced transformation kinetics are strongly affected by environmental conditions, where sunlight irradiance plays the main role, followed by water depth and dissolved organic carbon (DOC). Apart from poorly predictable weather-related issues, fair-weather irradiance has a seasonal trend that results in the fastest photodegradation in June and the slowest in December (at least in temperate areas of the northern hemisphere). Pollutants that have first-order photochemical lifetimes longer than a week take more than one month to achieve 95% photodegradation. Consequently, they may experience quite different irradiance conditions as their photodegradation goes on. The relevant time trend can be approximated as a series of first-order kinetic tracts, each lasting for one month. The trend considerably departs from an overall exponential decay, if degradation takes long enough to encompass seasonally varying irradiance conditions. For instance, sunlight irradiance is higher in July than in April, but increasing irradiance after April and decreasing irradiance after July ensure that pollutants emitted in either month undergo degradation with very similar time trends in the first 3–4 months after emission. If photodegradation takes longer, pollutants emitted in July experience a considerable slowdown in photoreaction kinetics as winter is approached. Therefore, if pollutants are photostable enough that their photochemical time trend evolves over different seasons, degradation acquires some peculiar features than cannot be easily predicted from a mere analysis of lifetimes in the framework of simple first-order kinetics. Such features are here highlighted with a modelling approach, taking the case of carbamazepine as the main example. This contaminant is almost totally biorecalcitrant, and it is also quite resistant to photodegradation.
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PARVATHI, L. T., and S. KARUTHAPANDIAN. "1D MoO3 Nanorods Decorated by Palladium Nanoparticles: Surface Plasmon Resonance Promoted Photodegradation of Congo Red Dye." Asian Journal of Chemistry 32, no. 9 (2020): 2315–23. http://dx.doi.org/10.14233/ajchem.2020.22791.

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In this work, 1D, MoO3 palm leaf shaped nanorods decorated by palladium nanoparticle for the photodegradation of organic pollutant. The Pd loaded MoO3 ratio were optimized and 2% Pd loaded MoO3 shows excellent photodegradation towards the organic pollutants. The synthesized Pd decorated MoO3 nanorods were characterized by various analytical tools such as TEM, SEM, BET, EDX, XRD, UV-DRS etc., The TEM and SEM results revealed that the palm leaf shaped MoO3 nanorods was well decorated by Pd metals. The crystallite size of MoO3 was decreased when increases the palladium loading percentage. The surface area of MoO3 lowered when palladium loaded. The prepared nanocomposites were in high purity confirmed by EDX analysis. The energy gap tailored into visible region by loaded palladium. The catalytic efficiency of the prepared nanocomposites were tested against the photo degradation of organic pollutant within 60 min and rate constant also calculated. The catalyst was not much lower their activity even five reusability. The OH− and h+ (holes) were the active species involved in the photodegradation mechanism.
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8

Muneer, Iqra, Muhammad Akhyar Farrukh, Shaghraf Shaghraf, Muhammad Khaleeq-Ur-Rahman, Akrajas Ali Umar, and Rohana Adnan. "Solvent Controlled Synthesis of Tin Oxide Nanocatalysts and their Applications in Photodegradation of Environmental Hazardous Materials." Materials Science Forum 756 (May 2013): 197–204. http://dx.doi.org/10.4028/www.scientific.net/msf.756.197.

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Solvent controlled synthesis of tin oxide nanocatalysts were prepared via the hydrothermal method. To study the effect of solvent on the particle size of tin oxide and their catalytic efficiency on photodegradation of environmental hazardous materials, the synthesis was carried out at different concentrations of solvent (isoamyl alcohol) keeping all other reaction conditions constant. The nanoparticles were characterized by FourierTransmission Infrared Spectroscopy, Scanning Electron Microscopy, Transmission Electron Microscopy, X-ray Diffraction and Thermogravimetric analysis. Prepared nanoparticles were applied as nanocatalyst under UV-visible light for the photodegradation of methyl green,which is an abundant organic pollutant of industrial waste water. Photodegradation activities of the nanocatalysts were measured in three different ways, i. pseudo first order rate constant, “k”. ii. percentage degradationand iii. degradation rate. Effect of solvent was quantitatively explained in term of double sphere model of ion-ion interaction. Degradation of pollutants was also monitored by High Performance Liquid Chromatography.
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9

Deng, Wei, Fuping Pan, Bill Batchelor, Bahngmi Jung, Peng Zhang, Ahmed Abdel-Wahab, Hongcai Zhou, and Ying Li. "Mesoporous TiO2–BiOBr microspheres with tailorable adsorption capacities for photodegradation of organic water pollutants: probing adsorption–photocatalysis synergy by combining experiments and kinetic modeling." Environmental Science: Water Research & Technology 5, no. 4 (2019): 769–81. http://dx.doi.org/10.1039/c8ew00922h.

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10

Ramay, Shahid M., Asif Mahmood, Shahid Atiq, Saadat Anwar Siddiqi, and Shahzad Naseem. "Photodegradation of Organic Pollutants using Fe-doped ZnO." Materials Today: Proceedings 2, no. 10 (2015): 5485–90. http://dx.doi.org/10.1016/j.matpr.2015.11.074.

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11

Parul, Kamalpreet Kaur, Rahul Badru, Prit Pal Singh, and Sandeep Kaushal. "Photodegradation of organic pollutants using heterojunctions: A review." Journal of Environmental Chemical Engineering 8, no. 2 (April 2020): 103666. http://dx.doi.org/10.1016/j.jece.2020.103666.

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12

Martinez-Haya, R., M. A. Miranda, and M. L. Marin. "Type I vs Type II photodegradation of pollutants." Catalysis Today 313 (September 2018): 161–66. http://dx.doi.org/10.1016/j.cattod.2017.10.034.

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13

Miao, Miao, Gangling Wang, Shaomei Cao, Xin Feng, Jianhui Fang, and Liyi Shi. "TEMPO-mediated oxidized winter melon-based carbonaceous aerogel as an ultralight 3D support for enhanced photodegradation of organic pollutants." Physical Chemistry Chemical Physics 17, no. 38 (2015): 24901–7. http://dx.doi.org/10.1039/c5cp04679c.

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14

Rahman, MM, S. Ahmed, Z. Yeasmin, and SM Masum. "Efficacy of biomaterial based photocatalytic composite in treating dye pollutants." Bangladesh Journal of Scientific and Industrial Research 53, no. 2 (May 27, 2018): 139–44. http://dx.doi.org/10.3329/bjsir.v53i2.36675.

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A biomaterial based photocatalytic composite, hydroxyapatite–TiO2–ZnO (HAp-TiO2–ZnO) has been developed following a solid-state combustion method while its efficacy was investigated through the photodegradation of (i) aquatic solution of synthetic dye, methylene blue (MB); and (ii) real textile dye effluent. The degradation profile was explored considering several factors, e.g.: (i) initial dye concentration; (ii) illumination span; (iii) dose of photocatalyst; and (iv) pH of targeted dye solution. The photodegradation was performed in both indoor and outdoor environment using halogen lamp (500 W) and sunlight respectively. Observed photodegradation revealed that though the photocatalytic composite effectively decomposed methylene blue at various extents under different experimental conditions but a dose of 0.5g photocatalyst/100 mL substrate solution (10×10-6 M methylene blue solution at pH 4) expedited optimal degradation (~ 97%) at 2 hours’ time interval. On the other hand though it was possible to degrade the textile effluent to some extent by illuminating through halogen lamp and sunlight but the success rate did not exceed 50%.Bangladesh J. Sci. Ind. Res.53(2), 139-144, 2018
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15

Khan, Idrees, Adnan Ali Khan, Ibrahim Khan, Muhammad Usman, Muhammad Sadiq, Faiz Ali, and Khalid Saeed. "Investigation of the photocatalytic potential enhancement of silica monolith decorated tin oxide nanoparticles through experimental and theoretical studies." New Journal of Chemistry 44, no. 31 (2020): 13330–43. http://dx.doi.org/10.1039/d0nj00996b.

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16

Rimoldi, Luca, Daniela Meroni, Ermelinda Falletta, Valentina Pifferi, Luigi Falciola, Giuseppe Cappelletti, and Silvia Ardizzone. "Emerging pollutant mixture mineralization by TiO2 photocatalysts. The role of the water medium." Photochemical & Photobiological Sciences 16, no. 1 (2017): 60–66. http://dx.doi.org/10.1039/c6pp00214e.

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17

Ahmad, Nafees, Saima Sultana, Syed Mohd Faisal, Anees Ahmed, Suhail Sabir, and Mohammad Zain Khan. "Zinc oxide-decorated polypyrrole/chitosan bionanocomposites with enhanced photocatalytic, antibacterial and anticancer performance." RSC Advances 9, no. 70 (2019): 41135–50. http://dx.doi.org/10.1039/c9ra06493a.

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18

Feng, Hui, Siqi Feng, Niu Tang, Songbai Zhang, Xiangyang Zhang, and Bo Liu. "Fabrication of TiO2/Fe2O3/CdS systems: effects of Fe2O3and CdS content on superior photocatalytic activity." RSC Advances 11, no. 17 (2021): 10300–10308. http://dx.doi.org/10.1039/d1ra00195g.

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19

Tsui, S. M., and W. Chu. "Photocatalytic degradation of dye pollutants in the presence of acetone." Water Science and Technology 44, no. 6 (September 1, 2001): 173–80. http://dx.doi.org/10.2166/wst.2001.0368.

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The photodegradation of textile azo dyes in aqueous solution containing acetone (ACE) photosensitizer was investigated at 253.7 nm. In this study, a typical azo reactive dye (C I Reactive Red 2 - RR2) is used as the probe compound. ACE is a powerful photosensitizer that possesses high triplet energy, and the presence of ACE significantly enhances the overall photodegradation reaction through simultaneous sensitization. In the UV/ACE system, at the optimum conditions, over 97% of RR2 can be successfully decomposed and decolored within 300 seconds of retention time. The photodegradation mechanisms of RR2 involve both photodechlorination and photoreduction, which follow pseudo first-order decay kinetics. The quantum yield of the photolysis system has been evaluated as a function of ACE concentration and the initial pH. RR2 contains the chlorotriazinyl group, which undergoes hydrolysis and results in the formation of hydrochloric acid, indicating that the photodechlorination process is the dominant reaction mechanism. The photo-product, H+, is likely to retard the quantum yield of dye decay, suggesting that the initial pH is a critical factor in changing the photodecolorization rates of dye. Generally, this system is more favorable at higher pH levels.
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20

Shi, Mingjin, Wei Wei, Zhifeng Jiang, Hekun Han, Jinrong Gao, and Jimin Xie. "Biomass-derived multifunctional TiO2/carbonaceous aerogel composite as a highly efficient photocatalyst." RSC Advances 6, no. 30 (2016): 25255–66. http://dx.doi.org/10.1039/c5ra28116d.

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21

Riaz, Nadia, Bustam-Khalil Mohamad Azmi, and Azmi Mohd Shariff. "Iron Doped TiO2 Photocatalysts for Environmental Applications: Fundamentals and Progress." Advanced Materials Research 925 (April 2014): 689–93. http://dx.doi.org/10.4028/www.scientific.net/amr.925.689.

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One of the most pervasive problems affecting people throughout the world is inadequate access to clean water and sanitation. Problems with water are expected to grow worse in the coming decades, with water scarcity occurring globally. Many recent studies have been reported on the photodegradation of the organic compounds in industrial wastewater in the presence of TiO2 semiconductor as photocatalyst. Heterogeneous photocatalysts using iron as a dopant metal, so far, have been reported for various environmental applications. This paper highlights the recent advances and applications of Fe-TiO2 photocatalysis for the degradation/photodegradation of various pollutants, alkanolamines and other organic pollutants like phenols and dyes.
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22

Abdollahi, Yadollah, Samad Sabbaghi, Ebrahim Abouzari-lotf, Hossein Jahangirian, and Nor Asrina Sairi. "A new achievement in green degradation of aqueous organic pollutants under visible-light irradiation." Water Science and Technology 77, no. 6 (January 17, 2018): 1493–504. http://dx.doi.org/10.2166/wst.2018.017.

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Abstract The global attention has been focused on degradation of the environmental organic pollutants through green methods such as advanced oxidation processes (AOPs) under sunlight. However, AOPs have not yet been efficient in function of the photocatalyst that has been used. In this work, firstly, CaCu3Ti4O12 nanocomposite was simultaneously synthesized and decorated in different amounts of graphene oxide to enhance photodegradation of the organics. The result of the photocatalyst characterization showed that the sample with 8% graphene presented optimum photo-electrical properties such as low band gap energy and a great surface area. Secondly, the photocatalyst was applied for photodegradation of an organic model in a batch photoreactor. Thirdly, to scale up the process and optimize the efficiency, the photodegradation was modeled by multivariate semi-empirical methods. As the optimized condition showed, 45 mg/L of the methyl-orange has been removed at pH 5.8 by 0.96 g/L of the photocatalyst during 288 min of the light irradiation. Moreover, the photodegradation has been scaled up for industrial applications by determining the importance of the input effective variables according to the following organics order > photocatalyst > pH > irradiation time.
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23

Souza, Diego H. P., Robson R. Guimarães, Thiago C. Correra, and Vitor M. Zamarion. "Investigation of the photocatalytic activity of titanium dioxide films under visible light measured by electrospray mass spectrometry." New Journal of Chemistry 42, no. 22 (2018): 18259–68. http://dx.doi.org/10.1039/c8nj04047h.

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24

Safarzadeh-Amiri, Ali, James R. Bolton, and Stephen R. Cater. "Ferrioxalate-mediated photodegradation of organic pollutants in contaminated water." Water Research 31, no. 4 (April 1997): 787–98. http://dx.doi.org/10.1016/s0043-1354(96)00373-9.

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25

Volkova, Anna V., Silke Nemeth, Ekaterina V. Skorb, and Daria V. Andreeva. "Highly Efficient Photodegradation of Organic Pollutants Assisted by Sonoluminescence." Photochemistry and Photobiology 91, no. 1 (October 20, 2014): 59–67. http://dx.doi.org/10.1111/php.12352.

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26

Shinde, S. S., C. H. Bhosale, and K. Y. Rajpure. "Photodegradation of organic pollutants using N-titanium oxide catalyst." Journal of Photochemistry and Photobiology B: Biology 141 (December 2014): 186–91. http://dx.doi.org/10.1016/j.jphotobiol.2014.09.017.

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27

Chen, Chuncheng, Wanhong Ma, and Jincai Zhao. "Semiconductor-mediated photodegradation of pollutants under visible-light irradiation." Chemical Society Reviews 39, no. 11 (2010): 4206. http://dx.doi.org/10.1039/b921692h.

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28

Márquez Brazón, E., C. Piccirillo, I. S. Moreira, and P. M. L. Castro. "Photodegradation of pharmaceutical persistent pollutants using hydroxyapatite-based materials." Journal of Environmental Management 182 (November 2016): 486–95. http://dx.doi.org/10.1016/j.jenvman.2016.08.005.

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29

Wee, L. H., M. Meledina, S. Turner, K. Custers, S. Kerkhofs, S. P. Sree, E. Gobechiya, C. E. A. Kirschhock, G. Van Tendeloo, and J. A. Martens. "Anatase TiO2 nanoparticle coating on porous COK-12 platelets as highly active and reusable photocatalysts." RSC Advances 6, no. 52 (2016): 46678–85. http://dx.doi.org/10.1039/c6ra06141a.

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30

Son, Bui Thanh, Nguyen Viet Long, and Nguyen Thi Nhat Hang. "The development of biomass-derived carbon-based photocatalysts for the visible-light-driven photodegradation of pollutants: a comprehensive review." RSC Advances 11, no. 49 (2021): 30574–96. http://dx.doi.org/10.1039/d1ra05079f.

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31

Bagheri, Samira, and Nurhidayatullaili Muhd Julkapli. "Mixed-phase TiO2 photocatalysis: correlation between phase composition and photodecomposition of water pollutants." Reviews in Inorganic Chemistry 37, no. 1 (March 1, 2017): 11–28. http://dx.doi.org/10.1515/revic-2016-0001.

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AbstractIn most cases, the combination of both anatase (up to 80%) and rutile (up to 20%) structures in a mixed-phase TiO2 semiconductor results in a better photocatalytic performance compared to the pure phase. The improvement from anatase to rutile is brought about by the enhanced transportation of photogenerated electrons. This consequently results in improved efficiency of the photoelectric and photocurrent conversion. This review highlights the effects of the morphology, particle size, and crystal structure of mixed-phase TiO2 toward the photodegradation of water pollutants. It was demonstrated that the synergistic effect between anatase and rutile TiO2 due to the interfacial electron transfer from rutile to anatase improved the photocurrent as well as the overall conversion efficiency of the anatase photoanodes. The morphologies of mixed-phase TiO2 also contributed to the final photodegradation properties. The charge and electron transfer of mixed-phase TiO2 improved the 1D structure. This consequently enables photodegradation at the visible light range.
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Wang, Huanli, Yafei Wang, Ailing Xu, Qipeng Yang, Fujun Tao, Mingliang Ma, Zhiwen Song, and Xiaobo Chen. "Facile synthesis of a novel WO3/Ag2MoO4 particles-on-plate staggered type II heterojunction with improved visible-light photocatalytic activity in removing environmental pollutants." RSC Advances 9, no. 60 (2019): 34804–13. http://dx.doi.org/10.1039/c9ra07175j.

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Chkirida, Soulaima, Nadia Zari, Redouane Achour, Abou el kacem Qaiss, and Rachid Bouhfid. "Effect of iron doped titanium oxide encapsulated in alginate on photocatalytic activity for the removal of dye pollutants." RSC Advances 10, no. 38 (2020): 22311–17. http://dx.doi.org/10.1039/d0ra02898c.

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Iron oxide/titania oxide are encapsulated in alginate biopolymer. These bio-nanocomposites are suitable for the photodegradation of dissimilar organic pollutants under UV irradiation as well as visible light.
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Huang, Wenyu, Ying Huang, Shuangfei Wang, Hongfei Lin, and Gilles Mailhot. "Degradation of 2,4-Dichlorophenol by Ethylenediamine-N,N′-disuccinic Acid-Modified Photo-Fenton System: Effects of Chemical Compounds Present in Natural Waters." Processes 9, no. 1 (December 25, 2020): 29. http://dx.doi.org/10.3390/pr9010029.

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This paper describes a study of the treatment of 2,4-dichlorophenol (2,4-DCP) with an ethylenediamine-N,N′-disuccinic-acid (EDDS)-modified photo-Fenton system in ultrapure water and different natural waters. The results showed that the EDDS-modified photo-Fenton system is adequate for 2,4-DCP degradation. Compared with a medium containing a single organic pollutant, the removal of pollutants in a more complex medium consisting of two organic compounds is slower by around 25 to 50% as a function of the organic pollutant. Moreover, 2,4-DCP can be further effectively degraded in the presence of organic materials and various inorganic ions. However, the photodegradation of 2,4-DCP in different natural waters, including natural lake water, effluent from domestic sewage treatment plants, and secondary effluent from pulp and paper mill wastewaters, is inhibited. Chemical compounds present in natural waters have different influences on the degradation of 2,4-DCP by adopting the EDDS-modified photo-Fenton system. In any case, the results obtained in this work show that the EDDS-modified photo-Fenton system can effectively degrade pollutants in a natural water body, which makes it a promising technology for treating pollutants in natural water bodies.
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35

Mijin, Dusan, Mirko Jugurdzija, and Petar Jovancic. "Photocatalytic degradation of synthetic dye under sunlight." Chemical Industry 61, no. 1 (2007): 7–12. http://dx.doi.org/10.2298/hemind0701007m.

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Synthetic dyes are widely used in the textile industry. Dye pollutants from the textile industry are an important source of environmental contamination. The majority of these dyes are toxic, mostly non-biodegradable and also resistant to decomposition by physico-chemical methods. Among new oxidation methods or "advanced oxidation processes", heterogeneous photocatalysis appears as an emerging destructive technology leading to the total mineralization of many organic pollutants. CI Basic Yellow 28 (BY28), commonly used as a textile dye, could be photocatalytically degraded using TiU2 as catalyst under sunlight. The effect of some parameters such as the initial catalyst concentration, initial dye concentration, initial NaCl and Na2CO3 concentrations, pH, H2O2 and type of catalyst on the degradation rate of BY28 was examined in details. The presence of NaCl and Na2CO3 led to inhibition of the photodegradation process. The highest photodegradation rate was observed at high pH, while the rate was the lowest at low pH. Increase of the initial H2O2 concentration increased the initial BY28 photodegradation efficiency. ZnO was a better catalyst than TiO2 at low dye concentrations.
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36

Cravanzola, Sara, Federico Cesano, Giuliana Magnacca, Adriano Zecchina, and Domenica Scarano. "Designing rGO/MoS2 hybrid nanostructures for photocatalytic applications." RSC Advances 6, no. 64 (2016): 59001–8. http://dx.doi.org/10.1039/c6ra08633k.

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Graphene and MoS2, with their structural and morphological compatibility, can be well integrated to make new hybrid materials with enhanced catalytic properties, including the photodegradation of organic pollutants.
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37

Son, Bui Thanh, Nguyen Viet Long, and Nguyen Thi Nhat Hang. "Fly ash-, foundry sand-, clay-, and pumice-based metal oxide nanocomposites as green photocatalysts." RSC Advances 11, no. 49 (2021): 30805–26. http://dx.doi.org/10.1039/d1ra05647f.

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This review highlights recent advances in the utilization of natural materials (clay mineral and pumice)- and waste materials (ash and foundry sand)-based metal oxide nanocomposites for photodegradation of various pollutants.
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38

Guan, Xiao-Hui, Liu Yang, Xin Guan, and Guang-Sheng Wang. "Synthesis of a flower-like CuS/ZnS nanocomposite decorated on reduced graphene oxide and its photocatalytic performance." RSC Advances 5, no. 46 (2015): 36185–91. http://dx.doi.org/10.1039/c5ra04030b.

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CZS/rGO composites with enhanced photocatalytic activity have been synthesized. The results demonstrate that the CZS/rGO composites have enormous potential for photodegradation of organic pollutants. The enhanced mechanism was also explained.
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39

Asih, Aprilia Kurnia, Rina Desni Yetti, and Boy Chandra. "Photodegradation of Antibiotic Using TiO2 as a Catalyst: A Review." International Journal of Pharmaceutical Sciences and Medicine 6, no. 2 (February 25, 2021): 37–43. http://dx.doi.org/10.47760/ijpsm.2021.v06i02.004.

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The use of antibiotics in the community harms the environment. Due to the use of antibiotics is a risk of antibiotic resistance. Photodegradation was a method that could be used to reduce this impact. Photodegradation is a decomposition process using photon energy assistance. The photodegradation process requires a photocatalyst, which is a semiconductor material when subjected to an energy photon. This jump of electrons causes electron holes that can interact with water solvents to form radicals. TiO2 is the most common photocatalyst that is used for the destruction of pollutants in aqueous solutions. Photochemically, TiO2 is a stable, non-toxic, widely available, and low-cost manufacturing process. Increasing the concentration of TiO2 catalyst will also increase the photodegradation activity of antibiotics, and the longer time of the irradiation time will increase the antibiotic degradation.
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40

Yang, Xiaodong, Shupeng Zhang, Lei Zhang, Bo Zhang, and Tianrui Ren. "Dynamic growth of rhombic dodecahedral Cu2O crystals controlled by reaction temperature and their size-dependent photocatalytic performance." RSC Advances 9, no. 63 (2019): 36831–37. http://dx.doi.org/10.1039/c9ra07255a.

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Compared with low-index {100} or {111} planes of Cu2O crystals, rhombic dodecahedra (RD) Cu2O crystals exposing 12 {110} facets exhibit the most superior photodegradation of organic pollutants.
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41

Tian, Ang, Quan Xu, Xiaoguo Shi, He Yang, Xiangxin Xue, Junhua You, Xiaoqiang Wang, Chenbo Dong, Xin Yan, and Hongjun Zhou. "Pyrite nanotube array films as an efficient photocatalyst for degradation of methylene blue and phenol." RSC Advances 5, no. 77 (2015): 62724–31. http://dx.doi.org/10.1039/c5ra07434g.

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The nanotube topography would improve the optical property of the pyrite crystals. The photodegradation of MB and phenol suggested that the pyrite nanotubes array films would be potential to be used in the treatment of pollutants.
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42

Juretic, Daria, Hrvoje Kusic, Ana Papic, Marina Smidt, Oskar Jezovita, Igor Peternel, and Ana Loncaric Bozic. "Modeling of photodegradation kinetics of aromatic pollutants in water matrix." Journal of Photochemistry and Photobiology A: Chemistry 271 (November 2013): 65–76. http://dx.doi.org/10.1016/j.jphotochem.2013.08.005.

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43

Chen, Chuncheng, Qi Wang, Pengxiang Lei, Wenjing Song, Wanhong Ma, and Jincai Zhao. "Photodegradation of Dye Pollutants Catalyzed by Porous K3PW12O40under Visible Irradiation." Environmental Science & Technology 40, no. 12 (June 2006): 3965–70. http://dx.doi.org/10.1021/es060146j.

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44

Kirankumar, V. S., and S. Sumathi. "A review on photodegradation of organic pollutants using spinel oxide." Materials Today Chemistry 18 (December 2020): 100355. http://dx.doi.org/10.1016/j.mtchem.2020.100355.

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45

Shi, Wenwu, and Nitin Chopra. "Nanoscale heterostructures for photoelectrochemical water splitting and photodegradation of pollutants." Nanomaterials and Energy 2, no. 3 (May 2013): 158–78. http://dx.doi.org/10.1680/nme.13.00009.

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46

Bianchi, Claudia L., Giuseppe Cappelletti, Silvia Ardizzone, Stefano Gialanella, Alberto Naldoni, Cesare Oliva, and Carlo Pirola. "N-doped TiO2 from TiCl3 for photodegradation of air pollutants." Catalysis Today 144, no. 1-2 (June 2009): 31–36. http://dx.doi.org/10.1016/j.cattod.2008.12.019.

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47

Calderaro, Federico, and Davide Vione. "Possible Effect of Climate Change on Surface-Water Photochemistry: A Model Assessment of the Impact of Browning on the Photodegradation of Pollutants in Lakes during Summer Stratification. Epilimnion vs. Whole-Lake Phototransformation." Molecules 25, no. 12 (June 17, 2020): 2795. http://dx.doi.org/10.3390/molecules25122795.

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Water browning in lakes (progressive increase of the content of chromophoric dissolved organic matter, CDOM) has the potential to deeply alter the photodegradation kinetics of pollutants during summer stratification. Browning, which takes place as a consequence of climate change in several Nordic environments, causes the thermocline to be shallower, because higher CDOM decreases the penetration of sunlight inside the water column. Using a model approach, it is shown in this paper that pollutants occurring in the epilimnion would be affected differently depending on their main photodegradation pathway(s): almost no change for the direct photolysis, slight decrease in the degradation kinetics by the hydroxyl radicals (•OH, but the resulting degradation would be too slow for the process to be effective during summer stratification), considerable decrease for the carbonate radicals (CO3•−), increase for the excited triplet states of CDOM (3CDOM*) and singlet oxygen (1O2). Because it is difficult to find compounds that are highly reactive with CO3•− and poorly reactive with 3CDOM*, the degradation rate constant of many phenols and anilines would show a minimum with increasing dissolved organic carbon (DOC), because of the combination of decreasing CO3•− and increasing 3CDOM* photodegradation. In contrast, overall photodegradation would always be inhibited by browning when the whole water column (epilimnion + hypolimnion) is considered, either because of slower degradation kinetics in the whole water volume, or even at unchanged overall kinetics, because of unbalanced distribution of photoreactivity within the water column.
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48

Zhang, Qingmei, Aoli Wen, Guoliang Chen, Juan Huang, Xu Zhou, Canjun Liu, Rongjin Zeng, Wenmin Yan, Yongxi Jin, and Shu Chen. "Photodegradation of Cationic and Anioic Dyes by pH-Dependent Dispersion of Amphoteric g-C3N4 Nanosheets." Journal of Nanoscience and Nanotechnology 20, no. 10 (October 1, 2020): 6215–21. http://dx.doi.org/10.1166/jnn.2020.18586.

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g-C3N4 nanosheets (NSs) were prepared via H2SO4 exfoliation from the bulky g-C3N4 and the photocatalytic (PC) activities were investigated comprehensively using Rodamine B (RhB) and Chromotrope 2R (Ch2R) as candidate pollutants. The results showed that the pH value have important functions in the improvement of photodegradation performance of C3N4 NSs. RhB as cationic dye could be photodegraded more efficiently under acidic conditions while Ch2R as anionic dye was degraded easily in pH ≥ 11 solution. In particular, the Ch2R could be degraded completely within only 30 min in pH = 11 solution. It might be because the amphoteric C3N4 NSs surface with carboxyl and amino groups possessed negative and positive charges in alkaline and acidic conditions, respectively. These results presumably provided a new idea to enhance the pH-dependent photodegradation activity and degrade different types of pollutants selectively by adjusting the pH of amphoteric nanocatalyts.
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49

Ghazal, Basma, and Saad Makhseed. "Impact of phthalocyanine structure as photosensitizer for ZnO nanophotocatalyst under natural solar irradiation." Journal of Porphyrins and Phthalocyanines 25, no. 03 (February 25, 2021): 202–9. http://dx.doi.org/10.1142/s1088424621500140.

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Novel composites of zinc oxide (ZnO) and copper phthalocyanines (CuTriPc and CuPc) were synthesized as efficient natural solar light photocatalysts for the photodegradation of organic wastewater pollutants. Spectroscopic and analytical measurements confirmed that both bulky triazolo copper phthalocyanine (CuTriPc) and unsubstituted planer (CuPc) were successfully coupled with ZnO nanoparticles. The synthesized nanocomposites were investigated as natural solar radiation photocatalysts toward the photodegradation of methylene blue (MB) analogue dye. The prepared CuTriPc/ZnO nanocomposite was proven to be an efficient solar light photocatalyst compared to pure ZnO and the unsubstituted CuPc/ZnO.
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50

Radosavljevic, K., A. V. Golubovic, M. M. Radisic, A. R. Mladenovic, D. Z. Mijin, and S. D. Petrovic. "Amoxicillin photodegradation by nanocrystalline TiO2." Chemical Industry and Chemical Engineering Quarterly 23, no. 2 (2017): 187–95. http://dx.doi.org/10.2298/ciceq160122030r.

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Nanocrystalline TiO2, synthesized by sol-gel route and characterized by XRPD, BET and SEM measurements, was applied in the photocatalytic degradation of amoxicillin, using an Osram Ultra-Vitalux? lamp as the light source. Amoxicillin is a semi-synthetic penicillin type antibiotic active against a wide range of grampositive and a limited range of gram-negative organisms. The continuous release of antibiotics and their persistence in the environment may result in serious irreversible effects on aquatic and terrestrial organisms. Heterogeneous catalysis, which uses catalysts like TiO2, is a promising route for the degradation of organic pollutants including antibiotics. The effects of initial concentration of catalyst, initial salt concentration (NaCl and Na2SO4), ethanol and pH on the photocatalytic degradation of amoxicillin were studied. The mineralization of amoxicillin was analyzed by ion chromatography as well as by total organic analysis. The catalytic properties of nanocrystalline TiO2 were compared to Evonik P25 catalyst.
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