Facile fabrication of CeO2 hollow microspheres with yeast as bio-templates
来源期刊:Journal of Rare Earths2015年第12期
论文作者:牟广宇 魏清莲 黄永民
文章页码:1329 - 1334
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),N2 adsorption/desorption analysis,X-ray photoelectron spectrum(XPS) and H2 temperature programmed reduction(H2-TPR).It was found that the products fully retained the morphology of the yeast cells and the size of the hollow microspheres was about1.5-2 μm.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.
牟广宇1,魏清莲1,黄永民1,2
1. Key Laboratory of Specially Functional Polymeric Materials and Related Technology Ministry of Education Department of Chemistry East China University of Science and Technology2. Shanghai Engineering Research Center of Space Engine Shanghai Institute of Space Propulsion
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),N2 adsorption/desorption analysis,X-ray photoelectron spectrum(XPS) and H2 temperature programmed reduction(H2-TPR).It was found that the products fully retained the morphology of the yeast cells and the size of the hollow microspheres was about1.5-2 μm.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.
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