Cooperative coupling of photocatalytic production of H2O2 and oxidation of organic pollutants over gadolinium ion doped WO3 nanocomposite |
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| Institution: | 1. Institute of Environmental Health, MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environment and Resources Science, Zhejiang University, Hangzhou 310058, China;2. College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, China;1. School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China;2. Department of Chemistry, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland;3. State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China;1. School of Environmental Science and Engineering/Tianjin Engineering Research Center of Bio Gas/Oil Technology, Tianjin University, Tianjin 300072, China;2. School of Environmental Science & Engineering, Southern University of Science and Technology, Shenzhen 518055, China;3. Georgia Tech Shenzhen Institute, Tianjin University, Shenzhen 518071, China;4. School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China;5. School of Science, Tibet University, Lhasa 850012, China;1. The MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China;2. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;3. Nuclear Research Institute for Future Technology and Policy, Seoul National University, Seoul 08826, Republic of Korea;1. School of Chemistry, Northeast Normal University, Changchun 130024, China;2. Center for Lignocellulosic Chemistry and Biomaterials, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China;3. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;1. College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;2. Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China;3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;1. Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. School of Chemistry and Chemical Engineering, The Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832004, China;3. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Lanzhou 730000, China |
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| Abstract: | This work reported the lanthanide ion (Gd3+) doped tungsten trioxide (Gd-WO3) nanocrystal for remarkable promoted photocatalytic degradation of organic pollutants and simultaneous in-situ H2O2 production. With doped lanthanide ion (Gd3+), Gd-WO3 showed a much broad and enhanced solar light absorption, which not only promoted the photocatalytic degradation efficiency of organic compounds, but also provided a suitable bandgap for direct reduction of oxygen to H2O2. Additionally, the isolated Gd3+ on WO3 surface can efficiently weaken the *OOH binding energy, increasing the activity and selectivity of direct reduction of oxygen to H2O2, with a rate of 0.58 mmol L?1 g?1 h?1. The in-situ generated H2O2 can be subsequently converted to ?OH based on Fenton reaction, further contributed to the overall removal of organic pollutants. Our results demonstrate a cascade photocatalytic oxidation-Fenton reaction which can efficiently utilize photo-generated electrons and holes for organic pollutants treatment. |
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