文献类型：期刊文献

英文题名：Singlet Oxygen Triggered by Superoxide Radicals in a Molybdenum Cocatalytic Fenton Reaction with Enhanced REDOX Activity in the Environment

作者：Yi, Quying[1,2];Ji, Jiahui[1,2];Shen, Bin[1,2];Dong, Chencheng[1,2];Liu, Jun[1,2];Zhang, Jinlong[1,2];Xing, Mingyang[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：53

期号：16

起止页码：9725

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20193407324663);WOS:【SCI-EXPANDED(收录号:WOS:000482521600040)】；

基金：This work was supported by the State Key Research Development Program of China (No. 2016YFA0204200), the National Natural Science Foundation of China (Nos. 21822603, 21677048, 21773062, 5171101651, and 21577036), the Shanghai Pujiang Program (No. 17PJD011), and the Fundamental Research Funds for the Central Universities (Nos. 22221818014 and 22A201514021). The authors thank the Research Center of Analysis and Test of East China University of Science and Technology for help with the characterization.

语种：英文

外文关键词：Water treatment - Bacteria - Metal ions - Heavy metals - Redox reactions

摘要：As an important reactive oxygen species (ROS) with selective oxidation, singlet oxygen (O-1(2)) has wide application prospects in biology and the environment. However, the mechanism of O-1(2) formation, especially the conversion of superoxide radicals (center dot O-2(-)) to O-1(2), has been a great controversy. This process is often disturbed by hydroxyl radicals (center dot OH). Here, we develop a molybdenum cocatalytic Fenton system, which can realize the transformation from center dot O-2 to O-1(2) on the premise of minimizing " OH. The Mo-0 exposed on the surface of molybdenum powder can significantly improve the Fe3+/Fe2+ cycling efficiency and weaken the production of "OH, leading to the generation of center dot O-2(-). Meanwhile, the exposed Mo6+ can realize the transformation of center dot O-2(-) to O-1(2). The molybdenum cocatalytic effect makes the conventional Fenton reaction have high oxidation activity for the remediation of organic pollutants and prompts the inactivation of Staphylococcus aureus, as well as the adsorption and reduction of heavy metal ions (Cu2+, Ni2+, and Cr6+). Compared with iron powder, molybdenum powder is more likely to promote the conversion from Fe3+ to Fe2+ during the Fenton reaction, resulting in a higher Fe2+/Fe3+ ratio and better activity regarding the remediation of organics. Our findings clarify the transformation mechanism from center dot O-2(-) to O-1(2) during the Fenton-like reaction and provide a promising REDOX Fenton-like system for water treatment.