Visible-light-driven heterostructured g-C_(3)N_(4)/Bi-TiO_(2) floating photocatalyst with enhanced charge carrier separation for photocatalytic inactivation of Microcystis aeruginosa
作者机构：School of EnvironmentKey Laboratory for Yellow River and Huai River Water Environment and Pollution Control(Ministry of Education)Henan Key Laboratory for Environmental Pollution ControlHenan Normal UniversityXinxiang 453007China College of Environmental Science and EngineeringState Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai 200092China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum MaterialsGuangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection MaterialsSchool of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou 510006China
出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)
年 卷 期：2021年第15卷第6期
页 面：367-378页
核心收录：
学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 081705[工学-工业催化] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金：the support of this research by the National Natural Science Foundation of China(Grant Nos.22008057 and 51909165) financially supported by the PhD.Scientific Research Starting Foundation of Henan Normal University(No.5101219170135) ostdoctoral Research Foundation of Henan Normal University(No.5101219470222).
主 题：Bi doping Visible light Algal removal Charge carrier separation
摘 要：The increase in occurrence and severity of cyanobacteria blooms is causing increasing concern;moreover,human and animal health is affected by the toxic effects of Microcystin-LR released into the water.In this paper,a floating photocatalyst for the photocatalytic inactivation of the harmful algae Microcystis aeruginosa(M.aeruginosa)was prepared using a simple sol-gel method,i.e.,coating g-C_(3)N_(4) coupled with Bi-doped TiO_(2) on Al_(2)O_(3)-modified expanded perlite(CBTA for short).The impact of different molar ratios of Bi/Ti on CBTA was considered.The results indicated that Bi doping in TiO_(2) inhibited photogenerated electron-hole pair recombination.With 6 h of visible light illumination,75.9%of M.aeruginosa(initial concentration=2.7106 cells/L)and 83.7%of Microcystin-LR(initial concentration=100μg/L)could be removed with the addition of 2 g/L CBTA1%(i.e.,Bi/Ti molar ratio=1%).The key reactive oxygen species(ROSs)in the photocatalytic inactivation process are h+andOH.The induction of the Bi^(4+)/Bi^(3+)species by the incorporation of Bi could narrow the bandgap of TiO_(2),trap electrons,and enhance the stability of CBTA-1%in the solutions with coexisting environmental substances.
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