Preparation and Characterization of Composed Alumina-zirconia Nanoparticles by Supercritical Anti-solvent Process

doi:10.3724/SP.J.1077.2010.01065

Abstract

Abstract: The nanoparticles of Al(NO₃)₃-Zr(NO₃)₄as the precursor of nano Al₂O₃-ZrO₂ particulates were prepared by means of supercritical fluid antisolvents (SAS) process using CO₂as antisolvents and absolutely ethanol as solvent. The effects of temperature and pressure on the preparation process and the co-antisolvent effect of Al and Zr components in the precursor were investigated. The spherical Al₂O₃-ZrO₂nanoparticles were obtained via the calcination of Al(NO₃)₃-Zr(NO₃)₄. The nanoparticles and precursor were characterized by TG-MS, XRD, XPS, FEG-TEM and TPR. In addition, the reducing property of Al₂O₃-ZrO₂nanoparticles supported Ni was examined. Compared with the catalyst support prepared from conventional impregnation-precipitation method, Ni could be dispersed better on the Al₂O₃-ZrO₂ nanoparticles prepared from SAS. It suggests that the nano-particulates prepared from SAS can be a promising candidate for catalyst support.

Key words: supercritical anti-solvent process (SAS), carbon dioxide, nanoparticles, alumina-zirconia composed oxide

CLC Number:

O643

JIANG Hao-Xi, HE Chun-Yan, SUN Huan-Hua, Li Gui-Ming, ZHANG Min-Hua. Preparation and Characterization of Composed Alumina-zirconia Nanoparticles by Supercritical Anti-solvent Process[J]. Journal of Inorganic Materials, 2010, 25(10): 1065-1070.

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