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Citation: Zeng Li, Wang Chun-Ming, Wei Ji-Ying, Zhu Yue-Xiang, Xie You-Chang. Preparation and Characterization of CrO_x/ZrO₂ with High Thermal Stability and High Specific Surface Area[J]. Acta Physico-Chimica Sinica, ;2004, 20(03): 251-255. doi: 10.3866/PKU.WHXB20040307 shu

Preparation and Characterization of CrO_x/ZrO₂ with High Thermal Stability and High Specific Surface Area

1.
State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing　100871

Received Date: 11 September 2003
Available Online: 15 March 2004

CrOx/ZrO2 samples were prepared by impregnation method and co-precipitation method. During the preparation all the precipitates were digested at 100 ℃ in their mother liquid for 24 h. The prepared samples were characterized by XRD、XPS、BET and TGA-DTA. It was proved that some silica dissolved from the glass vessels was deposited on the precipitates during the digestion and the presence of silica increased the crystallization temperature as well as the thermal stability of zirconia. Introducing CrOx into the system resulted in a further increase in the crystallization temperature of zirconia. In addition, the specific surface area and the thermal stability of the obtained samples were also significantly improved. Compared with impregnation method, co-precipitation method gave better results and a sample with a specific surface area of 121 m2•g－1 after calcination at 1000 ℃ was obtained.
- Zirconia;Chromium oxide;High specific surface area;Thermal stability
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Preparation and Characterization of CrOx/ZrO2 with High Thermal Stability and High Specific Surface Area

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通讯作者: 陈斌, bchen63@163.com

Preparation and Characterization of CrO_x/ZrO₂ with High Thermal Stability and High Specific Surface Area