Selective removal of sulfamethoxazole by a novel double Z-scheme photocatalyst:Preferential recognition and degradation mechanism  

作　　者：Jing-Yan Zhang Jie Ding Lu-Ming Liu RuiWu Lan Ding Jun-Qiu Jiang Ji-Wei Pang Yan Li Nan-Qi Ren Shan-Shan Yang 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin,150090,China [2]Harbin Institute of Technology National Engineering Research Center of Water Resources Co.,Ltd,Harbin,150090,China [3]College of Chemistry,Jilin University,2699 Qianjin Street,Changchun,130012,China [4]China Energy Conservation and Environmental Protection Group,Beijing,100089,China [5]School of Environmental Science and Engineering,Yancheng Institute of Technology,Yancheng,224051,China

出　　处：《Environmental Science and Ecotechnology》2024年第1期163-175,共13页环境科学与生态技术（英文）

摘　　要：Sulfamethoxazole(SMX)is a significant environmental concern due to its adverse effects and ecological risks.SMX elimination in aquatic environments via photocatalysis presents a viable solution,given its high oxidation potential.However,such a solution remains controversial,primarily due to a lack of selectivity.Here we introduce a molecularly imprinted TiO2@Fe_(2)O_(3)@g-C_(3)N_(4)(MFTC)photocatalyst designed for the selective degradation of SMX.To assess MFTC's selectivity,we applied it to degrade synthetic wastewater containing SMX alongside interfering species sulfadiazine(SDZ),ibuprofen(IBU),and bisphenol A(BPA).The results demonstrated a selective degradation efficiency rate of 96.8%,nearly twice that of competing pollutants.The molecularly imprinted sites within the catalyst played a crucial role by selectively capturing SMX and enhancing its adsorption,thereby improving catalytic efficiency.The degradation process involvedOH and·O_(2)^(-)free radicals,with a newly proposed double Z-scheme mechanism and potential pathway for SMX degradation by the MFTC photocatalytic system.This study enriches the application of photocatalysis using molecularly imprinted nanocomposite materials for treating complex pollutant mixtures in water.

关 键 词：selective photochemical oxidation Molecular imprinting Double Z-scheme heterojunction TiO2@Fe_(2)O_(3)@g-C_(3)N_(4) Sulfamethoxazole degradation 

分 类 号：X703[环境科学与工程—环境工程]