Hydrothermal Biotemplated Synthesis of Biomorphic Porous CeO2 and Their Catalytic Performance

作者：Zhao Xiaobing^*

来源：Journal of Inorganic and Organometallic Polymers and Materials, 2013, 23(2): 373-378.

DOI：10.1007/s10904-012-9788-3

• Biotemplate
• Biomorphic mineralization
• Porous CeO2
• Hydrothermal reaction
• Catalysis

Biomorphic porous CeO2 powder was synthesized by the hydrothermal method using stems of clover as biotemplates. Thermogravimetric and differential thermal analysis, X-ray diffraction, N-2 adsorption-desorption, field emission scanning electron microscopy and Fourier transfer infrared spectroscopy were applied to characterize the samples. The oxygen storage/release capacity (OSC) and catalytic oxidation performance of the biomorphic porous CeO2 for acid magenta were also investigated. Results show that the as-synthesized CeO2 powders exhibit a cubic phase and have porous structures with pore size ranging from several to dozens of micrometers. The results of N-2 adsorption-desorption measurement suggest that the biomorphic CeO2 contains a large number of mesopores on the surface of CeO2 framework; and, the pore diameter is from 15-35 nm. The OSC value of the biomorphic porous CeO2 is 174.6 mu mol O-2/g ceria, which is two-times higher than powdered CeO2. After catalytic oxidation for 300-min by the biomorphic porous CeO2, the decolorizing rate of acid magenta is close to 95 %, which is higher than for powdered CeO2 (64 %).

• 出版日期2013-3
• 单位常州大学