文献类型：期刊文献

英文题名：Enhanced electron transfer in FeS2-FeMoO4 heterojunction for nearly 100% singlet oxygen generation in efficient water remediation

作者：Song, Dawei[1];Pan, Yukun[1];Chen, Huan[1];Shi, Yaqin[1];Huang, Yanan[1];Niu, Bo[1,2];Long, Donghui[1,2];Zhang, Yayun[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Suzhou Lab, Struct Mat Res Dept, Suzhou 215000, Peoples R China

年份：2025

卷号：514

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20251918365471);WOS:【SCI-EXPANDED(收录号:WOS:001488761700001)】；

基金：This work was financially supported by National Natural Science Foundation of China (No. 22008073, 22478123) , Shanghai Sailing Program (No. 20YF1410600) , Shanghai Talent Development Fund (2021026) , and Natural Science Foundation of Shanghai (24ZR1417200) .

语种：英文

外文关键词：Heterostructure; Singlet oxygen; Peroxymonosulfate; Pollutant degradation; Graphene oxide

摘要：Singlet oxygen (1O2) plays a crucial role in environmental catalysis owing to its long lifetime, strong electrophilicity, and high selectivity, whereas selective generation of 1O2 with conventional catalysts remains challenges. Herein, we for the first time construct a FeS2-FeMoO4 heterostructure supported on graphene oxide (FeMoS-GO), and subsequently evaluate its efficacy in peroxymonosulfate (PMS) activation for degrading organic pollutants. Compared with non-heterostructures, our catalyst alters the electron density and coordination environment of Fe and Mo, enhancing electron transfer and facilitating the cyclic conversion of Fe2+/Fe3+ during PMS adsorption and activation. Experiments indicate that FeMoS-GO generates nearly 100 % 1O2, with concentrations two to three orders of magnitude higher than those of center dot OH and SO4 center dot-. Density functional theory (DFT) calculations and electrochemical tests also support the high efficiency of electron transfer and PMS adsorption by heterostructure. The degradation for phenol of FeMoS-GO is 100 times faster than that of the non-heterogeneous structure, and its degradation rate for various organic pollutants exceeds 90 %, while also demonstrating satisfactory performance in interference and stability tests. Our findings offer new insights and approaches for the efficient and controlled generation of 1O2 in water treatment and environmental remediation.