Sunlight assisted photoelectrocatalytic degradation of benzoic acid using stratified WO3/TiO2 thin films |
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| Affiliation: | 1. Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Ministry of Education, Taiyuan, 030024, PR China;2. Research Centre of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan, 030024, PR China;3. Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA;4. Department of Electrical Engineering, Shanxi Institute of Energy, Taiyuan, 030600, PR China;5. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China;6. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China;1. Department of Chemistry, Tsinghua University, Beijing, 100084, China;2. China Sinopec Research Institute of Petroleum Processing, Beijing, 100083, China;1. School of Food and Environment, Dalian University of Technology, Panjin 124221, China;2. Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China;1. Department of Chemistry, Tongji University, Shanghai 200092, PR China;2. School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, PR China;3. Key Laboratory of Micro-nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 100191, PR China;1. School of Energy & Environment, Thapar Institute of Engineering & Technology, Patiala 147004, Punjab, India;2. Department of Chemical Engineering, Malaviya National Institute of Technology, Jaipur 302017, Rajasthan, India;1. Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, 80-308, Gdansk, Poland;2. Department of Environmental Analysis, Faculty of Chemistry, University of Gdansk, 80-308, Gdansk, Poland |
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| Abstract: | The stratified WO3/TiO2 thin films have been deposited onto glass and FTO coated glass substrates using simple chemical a spray pyrolysis method. The structural, morphological, compositional and photoelectrocatalytic properties of the stratified WO3/TiO2 thin films are studied. The photoelectrochemical (PEC) study shows that, both short circuit current (Isc) and open circuit voltage (Voc) are (Isc =1.192 mA and Voc =0.925 V) relatively high at 50 ml spraying quantity of TiO2 solution on pre-deposited WO3. XRD analysis confirms that films are polycrystalline with monoclinic and tetragonal crystal structures for WO3 and TiO2 respectively. Specific surface area of 72.14 m2 g−1 is measured by Brunauer-Emmett-Teller (BET) technique. Photoelectrocatalytic degradation of benzoic acid (BA) dye in aqueous solutions is studied. The end result shows that the degradation percentage of benzoic acid (BA) using stratified WO3/TiO2 photoelectrode has reached 66% under sunlight illumination after 320 min. The amount of degradation is confirmed by COD analysis. |
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| Keywords: | Photoelectrochemical (PEC) Benzoic acid (BA) Photoelectrocatalysis Chemical oxygen demand (COD) |
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