文献类型：期刊文献

英文题名：Ordered Mesoporous CeO₂ Synthesized by Nanocasting from Cubic Ia3d Mesoporous MCM-48 Silica: Formation, Characterization and Photocatalytic Activity

作者：Ji, Pengfei[1,2];Zhang, Jinlong[1,2];Chen, Feng[1,2];Anpo, Masakazu[3]

机构：[1]E China Univ Sci & Technol, Adv Mat Lab, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Osaka Prefecture Univ, Dept Appl Chem, Grad Sch Engn, Sakai, Osaka 5998531, Japan

年份：2008

卷号：112

期号：46

起止页码：17809

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000260923900015)】；

基金：This work has been supported by Science and Technology Commission of Shanghai Municipality (07JC14015); Shanghai Nanotechnology Promotion Centre (0752nm001), National Nature Science Foundation of China (20773039, 20577009); National Basic Research Program of China (973 Program, 2007CB613306, 2004CB719500); and the Ministry ofScienceandTechnologyofChina(2006AA06Z379,2006DFA52710).

语种：英文

摘要：Ordered nanocrystalline rnesoporous cerium oxide was successfully synthesized using MCM-48 molecular sieves as a hard template. The long-range ordered mesostructure was characterized by low-angle and wide-angle X-ray diffraction (XRD), N-2 adsorption-desorption technique, and transmission electron microscopy (TEM), and the obtained cerium oxide exhibited high similarity to the cubic Ia3d symmetry of the silica template. Due to smaller crystal size, the mesoporous materials have a blue shift in light absorption as compared with nonporous materials. X-ray photoelectron spectrum (XPS) and energy-dispersive X-ray spectrum (EDS) patterns confirm that mesoporous materials possess more surface vacancies than bulk CeO2. Photocatalytic degradation of azodye acid orange 7 under visible light illumination was used as a catalytic test reaction. The activity of mesoporous product in dye decolorization is substantially higher than those for a nonporous sample and TiO2 P25.