文献类型：期刊文献

英文题名：Enhancement of H2O2 Decomposition by the Co-catalytic Effect of WS2 on the Fenton Reaction for the Synchronous Reduction of Cr(VI) and Remediation of Phenol

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

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

年份：2018

卷号：52

期号：19

起止页码：11297

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20183905874686);WOS:【SCI-EXPANDED(收录号:WOS:000446542100044)】；

基金：This work was supported by the State Key Research Development Program of China (grant no. 2016YFA0204200), the National Natural Science Foundation of China (grant nos. 21822603, 21773062, 21577036, 21377038, and 5171101651), the Shanghai Education Development Foundation and Shanghai Municipal Education Commission (grant nos. 16JC1401400 and 17520711500), the Shanghai Pujiang Program (grant no. 17PJD011), and the Fundamental Research Funds for the Central Universities (grant nos. 22A201514021 and 22221818014).

语种：英文

外文关键词：Biodegradation - Efficiency - Iron compounds - Phenols - Reaction rates - Catalytic oxidation - Chromium compounds

摘要：The greatest problem in the Fe(II)/H2O2 Fenton reaction is the low production of center dot OH owing to the inefficient Fe(III)/Fe(II) cycle and the low decomposition efficiency of H2O2 (<30%). Herein, we report a new discovery regarding the significant co-catalytic effect of WS2 on the decomposition of H2O2 in a photoassisted Fe(II)/H2O2 Fenton system. With the help of WS2 co-catalytic effect, the H2O2 decomposition efficiency can be increased from 22.9% to 60.1%, such that minimal concentrations of H2O2 (0.4 mmol/L) and Fe2+ (0.14 mmol/L) are necessary for the standard Fenton reaction. Interestingly, the co-catalytic Fenton strategy can be applied to the simultaneous oxidation of phenol (10 mg/L) and reduction of Cr(VI) (40 mg/L), and the corresponding degradation and reduction rates can reach up to 80.9% and 90.9%, respectively, which are much higher than the conventional Fenton reaction (52.0% and 31.0%). We found that the expose reductive W4+ active sites on the surface of WS2 can greatly accelerate the rate-limiting step of Fe3+/Fe2+ conversion, which plays the key role in the decomposition of H2O2 and the reduction of Cr(VI). Our discovery represents a breakthrough in the field of inorganic catalyzing AOPs and greatly advances the practical utility of this method for environmental applications.