物理化学学报2025，Vol.41Issue(6)：36-49,14.DOI:10.1016/j.actphy.2025.100052
调节O,S共掺杂C3N4中的活性氧生成以促进光催化降解微塑料
Modulating reactive oxygen species in O,S co-doped C3N4 to enhance photocatalytic degradation of microplastics
摘要
Abstract
Photocatalytic microplastic(MP)degradation via reactive oxygen species(ROS)is a considered environmentally friendly and sustainable approach for eliminating MP pollution in aquatic environments.However,it faces challenges due to the low migration and rapid recombination efficiency of charge carriers in photocatalysts.Herein,oxygen and sulfur co-doped carbon nitride(OSCN)nanosheets were synthesized through thermal polymerization coupled with a thermosolvent process.The O and S co-doping can reduce the bandgap and improve the light response of carbon nitride(C3N4).Meanwhile,O/S dopants effectively improve the delocalization of electron distribution,leading to increased carrier separation capacity,thereby promoting the formation of ROS and enhancing photocatalytic performance.Compared to C3N4,OSCN demonstrated significantly higher photocatalytic degradation and mineralization rates for MPs,including polyethylene(PE,traditional petroleum-based MPs)and polylactic acid(PLA,biodegradable bio-based MPs).Specifically,the mass loss of PE and PLA increased by 32.8%and 34.1%,respectively.Notably,·OH and 1O2 generated by OSCN synergistically catalyzed the degradation of PE,while·OH was the primary radical triggering the photolysis and hydrolysis of PLA.This study holds significant implications for the application of photocatalysis technology in the remediation of MP pollution in aquatic environments.关键词
微塑料/光催化/共掺杂/氮化碳/降解机制Key words
Microplastics/Photocatalysis/Co-doped/C3N4/Degradation mechanism分类
化学化工引用本文复制引用
罗雅丹,郑浩,李鑫,李锋民,唐华,佘希林..调节O,S共掺杂C3N4中的活性氧生成以促进光催化降解微塑料[J].物理化学学报,2025,41(6):36-49,14.基金项目
The project was supported by the Hainan Provincial Natural Science Foundation of China(423CXTD384),the National Natural Science Foundation of China(42077115),the National Science Fund for Distinguished Young Scholars of Shandong Province(ZR2021JQ13).海南省自然科学基金(423CXTD384),国家自然科学基金(42077115),山东省杰出青年基金(ZR2021JQ13)资助项目 （423CXTD384）
