文献类型：期刊文献

英文题名：Synthesis of nanosized mesoporous Co-Al spinel and its application as solid base catalyst

作者：Xu, Wenjie[1];Liu, Xiaohui[1];Ren, Jiawen[1];Liu, Huihui[1];Ma, Yichun[1];Wang, Yanqin[1];Lu, Guanzhong[1]

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

年份：2011

卷号：142

期号：1

起止页码：251

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20111113758840);WOS:【SCI-EXPANDED(收录号:WOS:000289401900032)】；

基金：This project was supported financially by the National Basic Research Program of China (No. 2010CB732306), the National Natural Science Foundation of China (No 20973058), the Commission of Science and Technology of Shanghai Municipality (10XD1401400, 08JC1407900) and "Excellent scholarship" of East China University of Science and Technology, China

语种：英文

外文关键词：Mesoporous; Cobalt aluminate; Solid base; Aldo condensation

摘要：A novel mesoporous Co-Al spinal catalyst with high surface area and suitable basicity was prepared by the thermal decomposition of Co-Al hydrotalcite-like compound. The properties of the solid base catalyst were characterized by XRD, FTIR, TEM, nitrogen sorption and CO2-TPD. The formation mechanism of the mesopores and the Co-Al spinel structure was also investigated by TG/DTA and mass-spectrometer, respectively. This is due to the partial oxidation of Co2+ ions and the dehydration of the interface OH groups in precursor. The formed Co3+ ions collapsed into the interlayer space, coordinated with the adjacent oxygen atoms (tetrahedral or octahedral), worked as pillars between layers and made the interlayer space to be almost opened (mesopores formed). The partial oxidation of Co2+ ions plays a critical role in the phase transformation and the formation of mesopores. The as-obtained mesoporous Co-Al spinel-type solid base catalyst was first used in the aldol condensation of furfural with acetone and the self-condensation of acetone and found that it had good activity and excellent selectivity in both reactions. The stability studies showed that the catalyst can be completely regenerated easily by calcination. (C) 2010 Elsevier Inc. All rights reserved.