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CeO_2 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 CeO_2 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 about1.5-2 μm.The catalytic test results showed that the as-obtained hollow CeO_2 microspheres possessed a higher catalytic activity in CO oxidation than the commercial CeO_2,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.
CeO 2 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 resultant CeO 2 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) , 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 μm. catalytic test results showed that the as-obtained hollow CeO 2 microspheres possessed a higher catalytic activity in CO oxidation than the commercial CeO 2, which attributed to their higher surface area, hollow structure and superior reduc ibility. this study provided a promising route for the preparation of a variety of other inorganic hollow microspheres.