Preparation and Characterization of CeO2-ZrO2 Solid Solutions Prepared by Citric Acid Sol-Gel Method

doi:10.7523/j.issn.2095-6134.2006.1.012

›› 2006, Vol. 23 ›› Issue (1): 64-69.DOI: 10.7523/j.issn.2095-6134.2006.1.012

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Preparation and Characterization of CeO2-ZrO2 Solid Solutions Prepared by Citric Acid Sol-Gel Method

YAO Qing, TIAN Qun, CEHN Hong-De, FANG Shi-Ping, HAN Yun

Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing ,100085

Received:1900-01-01 Revised:1900-01-01 Online:2006-01-15

Abstract

Abstract: A series of CeXZr1-XO2(x=0.5,0.6 and 0.8)mixed oxides were prepared by citric acid sol-gel method with nitrate solution. It was shown that solid solution had formed after calcination at 600℃ by X-ray diffraction(XRD). The surface and crystal structure of solid solutions were investigated by BET, oxygen storage capacity(OSC) and XRD after calcination at 600℃ and 900℃. With increase of mol%Ce, the specific surface area(SSA) and OSC of samples decreased ,while the stablity reduced by the analysis of XRD. It was shown that the temperature of peak had decreased after calcination at 900℃ by H2-TPR because of complete decomposition of citric complex at high temperature.

Key words: citric acid, sol-gel method, CeO2-ZrO2 solid solution, XRD, H2-TPR

CLC Number:

YAO Qing, TIAN Qun, CEHN Hong-De, FANG Shi-Ping, HAN Yun. Preparation and Characterization of CeO2-ZrO2 Solid Solutions Prepared by Citric Acid Sol-Gel Method[J]. , 2006, 23(1): 64-69.

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Preparation and Characterization of CeO2-ZrO2 Solid Solutions Prepared by Citric Acid Sol-Gel Method

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