Fabrication of AQ2S/GR composite photosensitizer for the simulated solar light-driven degradation of sulfapyridine  

作　　者：Shuang-Yang Zhao Cheng-Xin Chen Jie Ding Shan-Shan Yang Ya-Ni Zang Xu-Dong Qin Xin-Lei Gao Zhao Song Nan-Qi Ren 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin,150090,China [2]Harbin Institute of Technology National Engineering Research Center of Water Resources Co.,Ltd,Harbin,150090,China [3]Guangdong Yuehai Water Investment Co.,Ltd,Shenzhen,518021,China [4]UNSW Water Research Center,School of Civil and Environmental Engineering,The University of New South Wales,Sydney,NSW,2032,Australia

出　　处：《Environmental Science and Ecotechnology》2021年第4期1-9,共9页环境科学与生态技术（英文）

基　　金：This work was supported by the National Key Research and Development Program of China(2019YFD1100204);the National Nature Science Foundation of China(No.51778175);the Research and Application of Treatment Technology for High Concentration and Refractory Wastewater(Printing and Dyeing,Pharmaceutical,Chemical)GJSZ2021030907-YF.We gratefully acknowledge supports from Heilongjiang Province touyan team.

摘　　要：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
-,Cl
and 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.

关 键 词：PHOTOSENSITIZER AQ2S Visible-light-driven Free radicals trapping REUSABILITY 

分 类 号：O64[理学—物理化学]