Design of copper oxide and oxygen codoped graphitic carbon nitride activator for efficient radical and nonradical activation of peroxymonosulfate |
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| Institution: | 1. College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education (Hunan University), Changsha 410082, China;2. School of Design, Hunan University, Changsha 410082, China;3. School of Resources and Environment, Hunan University of Technology and Business, Changsha 410205, China;4. Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada;1. College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou 350108, China;2. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China;1. Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;2. Key Laboratory of Pollutant Chemistry and Environmental Treatment, College of Chemistry and Environmental Science, Yili Normal University, Yining 835000, China;1. Department of Chemistry, School of Science, Tianjin University, Tianjin 300350, China;2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;3. Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300350, China;1. College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, China;2. College of Chemistry, Sichuan University, Chengdu 610065, China;1. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China;2. College of Environment, Hohai University, Nanjing 210098, China;3. State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;1. School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518107, China;2. Department of Cardiology, The Affiliated TCM Hospital of Guangzhou Medical University, Guangzhou 510120, China;3. Bioscience and Biomedical Engineering Thrust, The Hong Kong University of Science and Technology (Guangzhou), Guangzhou 511400, China;4. Division of Life Science, Hong Kong University of Science and Technology, Hong Kong 999077, China |
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| Abstract: | Rational regulation of stable graphitic carbon nitride (CN) for superior peroxymonosulfate (PMS) activation is important in the catalytic degradation of water contaminants. In this work, the copper oxide and oxygen co-doped graphitic carbon nitride (CuO/O-CN) was prepared via one-step synthesis and applied in activating PMS for oxytetracycline (OTC) degradation, displaying superior catalytic performance. Systematic characterization and theoretical calculations indicated that the synergistic effect between the oxygen site of CN and CuO can modulate the electronic structure of the whole composite further facilitating the formation of non-radical 1O2 and various reactive radicals. Results of the influencing factor experiments revealed that CuO/O-CN has a strong resistance to the environmental impact. The degradation efficiency of OTC in the real water environment even exceeded that in the deionized water. After four successive runs of the optimal catalyst, the OTC removal rate was still as high as 91.3%. This work developed a high-efficiency PMS activator to remove refractory pollutants via both radical pathway and non-radical pathway, which showed a promising potential in the treatment of wastewaters. |
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