文献类型：期刊文献

英文题名：Facile fabrication of CeO2 hollow microspheres with yeast as bio-templates

作者：Mu Guangyu[1];Wei Qinglian[1];Huang Yongmin[1,2]

机构：[1]E China Univ Sci & Technol, Dept Chem, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China;[2]Shanghai Inst Space Prop, Shanghai Engn Res Ctr Space Engine, Shanghai 201112, Peoples R China

年份：2015

卷号：33

期号：12

起止页码：1329

外文期刊名：JOURNAL OF RARE EARTHS

收录：;EI(收录号：20155001675018);WOS:【SCI-EXPANDED(收录号:WOS:000366304200015)】；

基金：Project supported by the National Natural Science Foundation of China (21476071), Shanghai Leading Academic Discipline Project (B502), the Shanghai Engineering Research Center of Space Engine (13DZ2250600)

语种：英文

外文关键词：bio-template; CeO2; hollow spheres; CO oxidation; rare earths

摘要：CeO2 hollow microspheres were prepared through a facile method by using yeast cells as bio-templates. The yeast provided a solid frame for the deposition of cerium hydroxide to form the hybrid Ce(OH)(3)@ yeast precursor. The resulting CeO2 hollow microspheres were obtained by calcining the precursor. The products were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FTIR), N-2 adsorption/desorption analysis, X-ray photoelectron spectrum (XPS) and H-2 temperature programmed reduction (H-2-TPR). It was found that the products fully retained the morphology of the yeast cells and the size of the hollow microspheres was about 1.5-2 mu m. The catalytic test results showed that the as-obtained hollow CeO2 microspheres possessed a higher catalytic activity in CO oxidation than the commercial CeO2, which attributed to their higher surface area, hollow structure and superior reducibility. This study provided a promising route for the preparation of a variety of other inorganic hollow microspheres.