物理化学学报2026，Vol.42Issue(5)：54-68,15.DOI:10.1016/j.actphy.2025.100186
S型异质结Al6Si2O13/BiOBr通过增强电荷转移效应实现高效稳定光催化降解三唑磷和敌敌畏农药
S-scheme heterojunction Al6Si2O13/BiOBr with enhanced charge transfer effect for efficient and stable photocatalytic degradation of triazophos and dichlorvos pesticides
摘要
Abstract
Amidst growing concerns regarding pesticide contamination,particularly within the realms of food,grains,and meat products,the quest for highly efficient and stable photocatalysts for pollutant degradation has become an imperative area of research.In this study,a novel S-scheme heterojunction photocatalyst,Al6Si2O13/BiOBr(ASO/BO)nanocomposites,was successfully synthesized to enhance charge transfer and improve the photocatalytic degradation of Triazophos(TAP)and Dichlorvos(DDVP),prevalent agricultural pollutants.Performance evaluation revealed that the 60-ASO/BO nanocomposite(with 60%ASO loading ratio)achieved a remarkable degradation efficiency,reducing pesticide(TAP)concentration from 100%to 28.0%within 100 min,while retaining 94.7%of its initial activity after four cycles(400 min).In stark contrast,the degradation efficiencies of the individual ASO and BO were substantially lower,with ASO achieving 56.6%and BO merely 58.8%.For DDVP,the composite also exhibited excellent photocatalytic degradation activity,reducing its concentration from 100%to 32.3%within 100 min,far outperforming ASO(100%to 67.8%)and BO(100%to 47.9%).Enhanced charge migration within the S-scheme heterojunction accounts for the remarkable catalytic efficiency.The charge transfer pathway and mechanism were further validated using femtosecond transient absorption spectroscopy(fs-TAS),adsorption energy calculations,differential charge density analysis,Kelvin probe force microscopy(KPFM),and in situ X-ray photoelectron spectroscopy(XPS).The results emphasize that S-scheme charge migration is vital for enhancing photocatalytic performance.Consequently,the ASO/BO heterojunction based on the S-scheme provides a robust and reliable route for achieving durable and efficient photocatalytic removal of environmental contaminants,with broad application prospects in agriculture,food safety,and the preservation of grain and meat products.关键词
光催化剂/S型异质结/纳米复合材料/污染物/电荷转移Key words
Photocatalysts/S-scheme/Nanocomposites/Pollutants/Charge transfer分类
化学化工引用本文复制引用
孟奥运,李振华,熊国远,李真,张金锋..S型异质结Al6Si2O13/BiOBr通过增强电荷转移效应实现高效稳定光催化降解三唑磷和敌敌畏农药[J].物理化学学报,2026,42(5):54-68,15.基金项目
国家自然科学基金(42407636) （42407636）
安徽省高校优秀科研创新团队(2024AH010007) （2024AH010007）
安徽科技学院科技创新团队项目(2023KJCXTD003) （2023KJCXTD003）
安徽省高校自然科学研究项目(2022AH040068和2023AH051861) （2022AH040068和2023AH051861）
安徽省中青年教师培养行动学科(专业)带头人培育项目(DTR2024015) （专业）
水处理功能材料湖南省重点实验室2024年开放基金(KFJJ2402)资助. （KFJJ2402）
