文献类型：期刊文献

英文题名：Efficient Fe(III)/Fe(II) cycling triggered by MoO2 in Fenton reaction for the degradation of dye molecules and the reduction of Cr(VI)

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

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Joint Int Res Lab Precis Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：30

期号：12

起止页码：2205

外文期刊名：CHINESE CHEMICAL LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000506722300034)】；

基金：This work was supported by the State Key Research Development Program of China (No. 2016YFA0204200), National Natural Science Foundation of China (Nos. 21822603, 21811540394, 5171101651, 21677048, 21773062, 21577036), Shanghai Pujiang Program (No. 179D011), and the Fundamental Research Funds for the Central Universities (No. 22A201514021). Project supported by Shanghai Municipal Science and Technology Major Project (No. 2018SHZDZX03) and the Program of Introducing Talents of Discipline to Universities (No. B16017). The authors thank to Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：Fenton reaction; Co-catalytic; Molybdenum dioxide; Fe3+/Fe(2+)conversion; Dye wastewater

摘要：There is a relatively low efficiency of Fe(III)/Fe(II) conversion cycle and H2O2 decomposition (<30%) in conventional Fenton process, which further results in a low production efficiency of (OH)-O-center dot and seriously restricts the application of Fenton. Herein, we report that the commercial MoO2 can be used as the cocatalyst in Fenton process to dramatically accelerate the oxidation of Lissamine rhodamine B (L-RhB), where the efficiency of Fe(III)/Fe(II) cycling is greatly enhanced in the Fenton reaction meanwhile. And the L-RhB solution could be degraded nearly 100% in 1 min in the MoO2 cocatalytic Fenton system under the optimal reaction condition, which is apparently better than that of the conventional Fenton system (50%). Different from the conventional Fenton reaction where the (OH)-O-center dot plays an important role in the oxidation process, it shows that O-1(2) contributes most in the MoO2 cocatalytic Fenton reaction. However, it is found that the exposed Mo4+ active sites on the surface of MoO2 powders can greatly promote the rate-limiting step of Fe3+/Fe2+ cycle conversion, thus minimizing the dosage of H2O2 (0.400 mmol/L) and Fe2+ (0.105 mmol/L). Interestingly, the MoO2 cocatalytic Fenton system also exhibits a good ability for reducing Cr(VI) ions, where the reduction ability for Cr(VI) reaches almost 100% within 2 h. In short, this work shows a new discovery for MoO2 cocatalytic advanced oxidation processes (AOPs), which devotes a lot to the practical water remediation application. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.