Synergistic effects of advanced oxidization reactions in a combination of TiO2 photocatalysis for hydrogen production and wastewater treatment applications |
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| Affiliation: | 1. Clean Energy Research Laboratory, Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada;2. Department of Mechanical Engineering, Yildiz Technical University, Istanbul, Turkey;3. Department of Environmental Engineering, Engineering Faculty, Istanbul University-Cerrahpasa, Istanbul, Turkey;1. School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, Zhejiang Province, China;2. Key Laboratory of Education Ministry for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu Province, China;1. Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai 200240, China;2. Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai 200240, China;1. School of Chemical Sciences, The University of Auckland, Auckland, New Zealand;2. The Dodd-Walls Centre for Photonic and Quantum Technologies, New Zealand;3. The MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand;1. State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China;2. Brook Byers Institute for Sustainable Systems and School of Civil and Environmental Engineering, Georgia Institute of Technology, 828 West Peachtree Street, Atlanta, GA 30332, United States;3. Department of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan 411105, PR China;4. College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China |
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| Abstract: | In this paper, the synergistic effects of advanced oxidization reactions in a combination of TiO2 photocatalysis are comparatively investigated for hydrogen production and wastewater treatment applications. An experimental study is conducted with a photoelectrochemical reactor under a UV-light source. TiO2 is selected as the photocatalyst due to the high corrosion resistant nature and ability to form hydroxyl radicals with the interaction with photons. The synergetic effects of advanced oxidization processes (AOPs) such as Fenton, Fenton-like, photocatalysis (TiO2/UV) and UV photolysis (H2O2/UV) are investigated individually and in a combination of each other. The Fenton type reagent in the reactor is formed by anodic sacrificial of stainless-steel electrode with the presence of H2O2. The influences of various parameters, including pH level, type of the electrode and electrolyte and the UV light, on the performance of the combined system are also investigated experimentally. The highest chemical oxygen demand (COD) removal efficiency is observed as 97.9% for the experimental condition which combines UV/TiO2, UV/H2O2 and photo-electro Fenton type processes. The maximum hydrogen production rate from the photoelectrolysis of wastewater is obtained as 7.0 mg/Wh for the experimental condition which has the highest rate of photo-electro Fenton type processes. The average enhancement with the presence of UV light on hydrogen production rates and COD removal efficiencies are further calculated to be 3% and 20%, respectively. |
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| Keywords: | Hydrogen production Photoelectrochemical process Fenton reagent Wastewater Solar energy |
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