Fluorine-doped BiVO_(4) photocatalyst: Preferential cleavage of C−N bond for green degradation of glyphosate

查看全文 作　　者：Yunlong [1,2]Chen;Yingping [2,3]Huang;Hailin [2,3]Tian;Liqun [1,2]Ye;Ruiping [2]Li;Chuncheng [4]Chen;Zhongxu [1,2]Dai;Di [4]Huang 机构地区：[1]College of Materials and Chemical Engineering,China Three Gorges University,Yichang 443002,China;[2]Engineering Research Center of Eco-environment in Three Gorges Reservoir Region,Ministry of Education,China Three Gorges University,Yichang 443002,China;[3]College of Biology&Pharmacy,China Three Gorges University,Yichang 443002,China;[4]Beijing National Laboratory for Molecular Sciences,Key Laboratory of Photochemistry,CAS Research/Education Center for Excellence in Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China 出　　处：《Journal of Environmental Sciences》索引2023年第5期,共9页 基　　金：supported by the National Natural Science Foundation of China(Nos.21972073,22136003,22176110);the Hubei Province Support Project of Introducing Intelligence(No.2019BJH004);the 111 Project of China(No.D20015). 摘　　要：With increasing concerns on the environment and human health,the degradation of glyphosate through the formation of less toxic intermediates is of great importance.Among the developed methods for the degradation of glyphosate,photodegradation is a clean and efficient strategy.In this work,we report a new photocatalyst by doping F ion on BiVO_(4) that can efficiently degrade glyphosate and reduce the toxic emissions of aminomethylphosphonic acid(AMPA)through the selective(P)−C−Ncleavage in comparison of BiVO_(4) catalyst.The results demonstrate that the best suppression of AMPA formation was achieved by the catalyst of 0.3F@BiVO_(4) at pH=9(AMPA formation below10%).In situ attenuated total reflectance Fourier transforms infrared(ATR-FTIR)spectroscopy indicates that the adsorption sites of glyphosate on BiVO_(4) and 0.3F@BiVO_(4) are altered due to the difference in electrostatic interactions.Such an absorption alteration leads to the preferential cleavage of the C−Nbond on the N−C−P skeleton,thereby inhibiting the formation of toxic AMPA.These results improve our understanding of the photodegradation process of glyphosate catalyzed by BiVO_(4)-based catalysts and pave a safe way for abiotic degradation of glyphosate. 关 键 词：Fluorine-doped BiVO_(4) GLYPHOSATE AMPA Photocatalytic degradation Seletive oxidation