文献类型：期刊文献

英文题名：Hierarchical Organization and Catalytic Activity of High-Surface-Area Mesoporous Ceria Microspheres Prepared Via Hydrothermal Routes

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：2010

卷号：2

期号：3

起止页码：838

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20101512835548);WOS:【SCI-EXPANDED(收录号:WOS:000275825700037)】；

基金：This work was supported financially by the National Basic Research Program of China (2004CB719500), 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：mesoporous CeO2 microsphere; flowerlike morphology; high surface area; catalytic activity; trichloroethylene combustion

摘要：Mesoporous Ce(OH)CO3 microspheres with flowerlike three-dimensional (3D) hierarchical structure were successfully synthesized via different hydrothermal systems, including glucose/acrylic acid, fructose/acrylic acid, glucose/propanoic acid, and glucose/n-butylamine systems. After Ce(OH)CO3 microspheres were calcined, mesoporous CeO2, microspheres with the same flowerlike morphology as Ce(OH)CO3 microspheres were obtained. Especially, flowerlike CeO2 microspheres prepared via the glucose/acrylic acid system are composed of many interconnected mesoporous petal-like nanosheets with thicknesses of 40-60 nm and have high surface area (211 m(2) g(-1)), large pore volume (0.32 cm(3) g(-1)), and narrow pore size distribution (similar to 3.8 nm in diameter). A possible formation mechanism of Ce(OH)CO3 microspheres is proposed: the large N-containing organic compounds in situ produced in the above reaction systems played a crucial role in controlling the assembly of Ce(OH)CO3 building blocks into the flowerlike Ce(OH)CO3 microspheres. For trichloroethylene combustion, flowerlike CeO2 microspheres were found to exhibit much higher catalytic activity than general CeO2 prepared with the conventional methods and the T-10% and T-90% were as low as 100 and 204 degrees C, respectively.