Citation: ZHANG Xi-Yu, GE Sheng-Song, SHAO Qian, LIU Mei LIU, LIU Qing-Yun. Synthesis and Photocatalytic Activity of CeO₂ Hollow Microspheres via Yeast Template Route[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(9): 1535-1542. doi: 10.11862/CJIC.2016.201 shu

Synthesis and Photocatalytic Activity of CeO₂ Hollow Microspheres via Yeast Template Route

College of Chemical and Environmental Engineering, Shandong University of Science & Technology, Qingdao, Shandong 266590, China

Corresponding author: GE Sheng-Song, geshengsong@126.com
Received Date: 5 March 2016
Revised Date: 30 July 2016

Figures(9)

Cerium dioxide (CeO₂) hollow microspheres have been prepared via bio-template and precipitation method using yeast as template. The products were characterized by Fourier transform infrared, X-ray diffraction, X-ray photoelectron spectra, scanning electron microscopy, transmission electron microscopy and N₂ adsorption-desorption isotherms. The results showed that the CeO₂ hollow microspheres were obtained after calcination at 600 ℃, and their shapes were approximately ellipsoid same as the yeasts. The shell of the as-prepared hollow microspheres is composed of CeO₂ nanoparticles with size of ~25 nm. The specific surface area of the sample is 22 m²·g^-1 which is higher than the sample prepared without templates. The band gap energy of the CeO₂ hollow microsphere (3.03 eV) is small compared with the samples prepared without templates (3.42 eV) via UV-Vis diffuse reflectance spectrum. The as-prepared CeO₂ hollow microspheres exhibit good photocatalytic activity for the degradation of acid orange 7 (AO 7) at room temperature under solar light irradiation. The degradation rate of AO 7 can be 96% after 120 min which is much higher than that of samples prepared without templates. The formation mechanism of CeO₂ hollow microspheres has been proposed.
- hollow microsphere,
- CeO₂,
- yeast,
- bio-template,
- photocatalyst
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Synthesis and Photocatalytic Activity of CeO2 Hollow Microspheres via Yeast Template Route

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通讯作者: 陈斌, bchen63@163.com

Synthesis and Photocatalytic Activity of CeO₂ Hollow Microspheres via Yeast Template Route