文献类型：期刊文献

英文题名：Mesoporous single-crystal Cr2O3: Synthesis, characterization, and its activity in toluene removal

作者：Wang, Yangang[1]; Yuan, Xiaohong[2]; Liu, Xiaohui[1]; Ren, Jiawen[1]; Tong, Weiyi[1]; Wang, Yanqin[1]; Lu, Guanzhong[1]

机构：[1] Lab for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237, China; [2] Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai, 201208, China

年份：2008

卷号：10

期号：9

起止页码：1117

外文期刊名：Solid State Sciences

收录：EI(收录号：20083611514576)

语种：英文

外文关键词：Catalyst activity - Catalytic oxidation - Hydrofluoric acid - Calcination - Chromium compounds - Nitrates - Silica - Mesoporous materials - Toluene

摘要：In this paper, a series of ordered mesoporous single-crystal Cr2O3 samples were synthesized through a hard-templating pathway by using three-dimensional (3D) cubic mesoporous silica, KIT-6, as the template and chromium nitrate as the precursor. In the synthesis, the intermediate composites (chromium nitrate/KIT-6) were calcined in air for 4 h at different temperatures (from 400 to 700 °C, interval 100 °C) to decompose the nitrate species. Then, the silica template was removed by dissolution in 10% HF solution twice. The resulting Cr2O3 samples were characterized by XRD, TEM, XPS, and N2-sorption analysis and their catalytic properties were also investigated in the oxidation of toluene. These results showed that the obtained ordered mesoporous Cr2O3 are exact reverse-replica of the template. It was also found that the catalytic activity was related to mesostructure and/or surface area as well as the calcination temperatures. ? 2007 Elsevier Masson SAS. All rights reserved.