文献类型：期刊文献

英文题名：Efficient low-temperature catalytic combustion of trichloroethylene over flower-like mesoporous Mn-doped CeO₂ microspheres

作者：Li, Hongfeng;Lu, Guanzhong[1];Dai, Qiguang;Wang, Yanqin;Guo, Yun;Guo, Yanglong

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China

年份：2011

卷号：102

期号：3-4

起止页码：475

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000287946800016)】；

基金：The work was supported financially by the National Basic Research Program of China (2010CB732300), the National Natural Science Foundation of China (20673037), and the Commission of Science and Technology of Shanghai Municipality (06JC14095).

语种：英文

外文关键词：Flower-like mesoporous microsphere; Mn-doped CeO2; Hydrothermal synthesis; Trichloroethylene; Catalytic combustion

摘要：Flower-like mesoporous Mn-doped CeO2 microspheres with three-dimensional (3D) hierarchical structures were successfully prepared by a hydrothermal method with the aid of glucose and acrylic acid and subsequent particular thermal treatment, and characterized by SEM, XRD, N-2 adsorption/desorption, H-2-TPR, XPS, Raman spectra and so on. The results show that the atomic ratios of Mn/(Ce + Mn) in the Ce-Mn-O samples as well as their morphologies affect obviously their catalytic performances for low-temperature catalytic combustion of trichloroethylene (TCE). These flower-like Ce-Mn-O microspheres have not only very excellent activity but also high stability, compared with pure flower-like CeO2 microspheres or bulk Ce-Mn-O samples. The flower-like sample with atomic ratio of Mn/(Ce + Mn) of 0.21 exhibits the best activity, for instance, T-50 (the temperature for 50% conversion of ICE) is as low as 87 degrees C, showing much higher catalytic activity than the sample prepared by a co-precipitation or sol-gel method. High surface area, high oxygen mobility and rich surface active oxygen species are responsible for the high catalytic performance of flower-like Mn-doped CeO2 microspheres, compared with general Ce-Mn-O mixed oxides. (C) 2010 Elsevier B.V. All rights reserved.