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Fabrication of AQ2S/GR composite photosensitizer for the simulated solar light-driven degradation of sulfapyridine 被引量:1
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作者 Shuang-Yang Zhao cheng-xin chen +6 位作者 Jie Ding Shan-Shan Yang Ya-Ni Zang Xu-Dong Qin Xin-Lei Gao Zhao Song Nan-Qi Ren 《Environmental Science and Ecotechnology》 2021年第4期1-9,共9页
Chlorination has been intensively investigated for use in water disinfection and pollutant elimination due to its efficacy and convenience;however,the generation and transportation of chlorine and hypochlorite are ene... Chlorination has been intensively investigated for use in water disinfection and pollutant elimination due to its efficacy and convenience;however,the generation and transportation of chlorine and hypochlorite are energy-consuming and complicated.In this study,a novel binary photosensitizer consisting of anthraquinone-2-sulfonate(AQ2S)and graphene was synthesized via a p-p stack adsorption method;this compound could allow for the chlorination of organic pollutants using on-site chlorine generation.In this photosensitive degradation process,sulfapyridine(SPY)was selected as a model pollutant and was decomposed by the reactive species(Cl2-,Cland O2-)generated during the photosensitive oxidation of chloride.The synthesized AQ2S/graphene exhibited superior activity,and the degradation rate of SPY was over 90%after 12 h of visible light irradiation with a kinetic constant of 0.2034h1.Results show that 20 mg AQ2S/GR at a 21%weight percentage of AQ2S in a pH 7 SPY solution with 1 mol/L Clachieved the highest kinetics rate at 0.353 h1.Free radical trapping experiments demonstrated that Cl2-and O2-were the dominant species involved in SPY decomposition under solar light.The reusability and stability of this composite were verified by conducting a cycle experiment over five successive runs.The capacity of photodegradation still remained over 90%after these 5 runs.The current study provides an energyefficient and simple-operational approach for water phase SPY control. 展开更多
关键词 PHOTOSENSITIZER AQ2S Visible-light-driven Free radicals trapping REUSABILITY
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