Ultrafast photocatalytic degradation of nitenpyram by 2D ultrathin Bi2WO6:mechanism,pathways and environmental factors  

作　　者：Yuan-Hao Cheng Juan Chen Hui-Nan Che Yan-Hui Ao Bin Liu 

机构地区：[1]Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education,College of Environment,Hohai University,Nanjing 210098,China [2]School of Chemical and Biomedical Engineering,Nanyang Technological University,Singapore 637459,Singapore

出　　处：《Rare Metals》2022年第7期2439-2452,共14页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No. 51979081);the Fundamental Research Funds for the Central Universities (No. B200202103);the National Key Plan for Research and Development of China (No. 2016YFC0502203);the National Science Funds for Creative Research Groups of China (No. 51421006) and PAPD

摘　　要：As a common insecticide,nitenpyram(NTP)seriously threatens the human health and environmental safety.In this work,a visible-light-responsive photocata-lyst two-dimensional(2D)Bi_(2)WO_(6) was synthesized and applied to degrade NTP.Compared with bulk Bi_(2)WO_(6),the 2D Bi_(2)WO_(6)exhibits better photocatalytic performance for NTP degradation under visible-light irradiation.The enhanced activity can be ascribed to the unique 2D struc-ture which would induce to higher efficiency of carrier separation.Moreover,hole(h+)plays a major role(and·O^(2-))in the degradation of NTP.Based on the interme-diates detected by high-performance liquid chromatogra-phy-mass spectrometry(HPLC-MS),the degradation pathway of NTP was proposed.In addition,the influence of typical environmental factors(pH,water matrix,inorganic cations and common anions)on the degradation of NTP was also investigated.This work not only helps people to understand the degradation of pesticides in actual water bodies,but also provides reference for the subsequent treatment of agricultural wastewater.

关 键 词：PHOTOCATALYSIS Two-dimensional(2D)Bi_(2)WO_(6) NITENPYRAM Degradation pathway 

分 类 号：X592[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]