文献类型：期刊文献

英文题名：MCM-41 supported nano-sized CuO-CeO2 for catalytic combustion of chlorobenzene

作者：Zheng, Jie[1];Chen, Zhu[1];Fang, Jianfei[2];Wang, Zhuo[1];Zuo, Shufeng[1]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Qual & Tech Supervis Inspect Ctr Yongkang, Yongkang 321300, Peoples R China

年份：2020

卷号：38

期号：9

起止页码：933

外文期刊名：JOURNAL OF RARE EARTHS

收录：SCI-EXPANDED(收录号：WOS:000551504000003)、、EI(收录号：20200107979698)、Scopus(收录号：2-s2.0-85077277203)、WOS

基金：Project supported by the National Natural Science Foundation of China (21577094), Zhejiang Public Welfare Technology Research Project (LGG19B070003) and the Foundation of Science and Technology of Shaoxing City (2018C10019).

语种：英文

外文关键词：CuO-CeO2; MCM-41; Nano-sized; Chlorobenzene; Catalytic combustion; Rare earths

外文摘要：In this paper, MCM-41 was synthesized by a soft template technique and MCM-41 supported CuO-CeO2 nano-sized catalysts with different Cu/Ce molar ratios were prepared by a deposition-precipitation method. N-2 adsorption, HRTEM-EDS, H-2-TPR, XPS characterization, as well as catalytic activity and durability tests for the catalytic combustion of chlorobenzene (CB) were conducted to explore the relationship between the structure and catalytic performance of the catalysts. It is revealed that CuCe(6:1)/MCM-41 has the highest activity and can completely catalyze the degradation of CB at 260 degrees C. The reasons for the high activity of the catalysts are as follows: MCM-41, a type of mesoporous material which has large pore size and large specific surface area, is suitable as a catalyst carrier. The average diameter of nano-sized CuO and CeO2 particles is about 3-5 nm and adding CeO2 improves the dispersion of active component CuO, which are highly and evenly dispersed on the surface of MCM-41. Characterization results also explain why MCM-41 supported CuO-CeO2 with appropriate proportion can highly enhance the catalytic activity. The reason is that CeO2 acting as an oxygen-rich material can improve the mobility of oxygen species through continuous redox between Ce4+ and Ce3+ and improve the catalytic performance of CuO for CB combustion. Besides, CuCe (6:1)/MCM-41 also displays good durability for CB combustion, both in the humid condition and in the presence of benzene, making it a promising catalytic material for the elimination of chlorinated VOCs. (C) 2020 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.