催化作用
双金属片
煅烧
热解
双金属
降级(电信)
化学工程
碳纤维
化学
多相催化
材料科学
无机化学
复合数
有机化学
复合材料
物理化学
电信
工程类
计算机科学
作者
Yang Zheng,Xuedong Du,Ge Song,Jinyu Gu,Jieru Guo,Minghua Zhou
出处
期刊:Chemosphere
[Elsevier]
日期:2023-01-01
卷期号:312: 137353-137353
被引量:25
标识
DOI:10.1016/j.chemosphere.2022.137353
摘要
A highly efficient heterogeneous electro-Fenton (Hetero-EF) catalyst with core-shell structure was successfully prepared by calcination of Mn-doped Mil-53 (Fe) precursor at high temperature. FeMn@C-800/2 prepared at pyrolysis temperature of 800 °C and Fe:Mn molar doping ratio of 2:1 showed the best catalytic performance for the degradation of carbamazepine (CBZ). The characterization, properties and stability of FeMn@C-800/2 were systematically investigated, obtaining the apparent first-order reaction rate of Hetero-EF was 8.9 and 17.8 times higher than that on Fe@C-800 and Mn@C-800 at the optimized conditions of current density 10 mA cm−2, catalyst dosage of 50 mg L−1 and initial pH 4.0, respectively. The incorporation of Mn promoted the generation of more Fe0 and Fe3C during the pyrolysis process, and enhanced the internal micro-electrolysis between Fe0 and carbon shell. At the same time, the presence of Mn0 also promoted the regeneration of Fe2+, and improved the activity of iron-carbon heterogeneous catalysis in the EF process, so as to degrade organic pollutants more effectively. This work would help to gain insight into the design of MOFs derived Fe–Mn bimetal catalyst and its mechanism for enhanced heterogeneous electro-Fenton.
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