In situ single iron atom doping on Bi_(2)WO_(6)monolayers triggers efficient photo-fenton reaction  

作　　者：Wei Liu Peifang Wang Juan Chen Xin Gao Huinan Che Xiaozhi Su Bin Liu Yanhui Ao 

机构地区：[1]Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes,Ministry of Education,College of Environment,Hohai University,No.1,Xikang Road,Nanjing,210098,China [2]School of Chemical and Biomedical Engineering,Nanyang Technological University,Singapore,637459,Singapore [3]Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai,201204,China

出　　处：《Environmental Science and Ecotechnology》2024年第4期315-322,共8页环境科学与生态技术（英文）

基　　金：financial support from the Natural Science Foundation of China(51979081,52100179);Fundamental Research Funds for the Central Universities(B200202103);National Science Funds for Creative Research Groups of China(No.51421006);PAPD and Photon Science Research center for Carbon Dioxide.

摘　　要：Developing an efficient photocatalytic system for hydrogen peroxide(H_(2)O_(2))activation in Fenton-like processes holds significant promise for advancing water purification technologies.However,challenges such as high carrier recombination rates,limited active sites,and suboptimal H_(2)O_(2)activation efficiency impede optimal performance.Here we show that single-iron-atom dispersed Bi_(2)WO_(6)monolayers(SIAD-BWOM),designed through a facile hydrothermal approach,can offer abundant active sites for H_(2)O_(2)activation.The SIAD-BWOM catalyst demonstrates superior photo-Fenton degradation capabilities,particularly for the persistent pesticide dinotefuran(DNF),showcasing its potential in addressing recalcitrant organic pollutants.We reveal that the incorporation of iron atoms in place of tungsten within the electron-rich[WO_(4)]^(2-)layers significantly facilitates electron transfer processes and boosts the Fe(II)/Fe(III)cycle efficiency.Complementary experimental investigations and theoretical analyses further elucidate how the atomically dispersed iron induces lattice strain in the Bi_(2)WO_(6)monolayer,thereby modulating the d-band center of iron to improve H_(2)O_(2)adsorption and activation.Our research provides a practical framework for developing advanced photo-Fenton catalysts,which can be used to treat emerging and refractory organic pollutants more effectively.

关 键 词：H_(2)O_(2)activation Water treatment Bismuth tungstate Photo-fenton catalysts Emerging organic pollutants 

分 类 号：X703[环境科学与工程—环境工程]