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Acta Physico-Chimica Sinica  2006, Vol. 22 Issue (03): 345-349    DOI: 10.3866/PKU.WHXB20060318
Textural and Structure Characterizations of Ce1-xMnxO2Prepared by Citric Acid Sol-Gel Method
YE Qing; XU Bo-Qing
Innovative Catalysis Program, Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
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Abstract  Textural and structure characterizations of Ce1-xMnxO2 (0≤x≤1) samples were studied by N2 adsorption/desorption, XRD and Raman spectroscopy. The N2 adsorption/desorption isotherms are found to be IV-type according to BDDT and their related hysteresis loops are H1 type. Pore size distribution of the Ce1-xMnxO2 samples is in the mesopores range with Rp (max) between 2.5 nm and 3.7 nm. Particle sizes of the samples with both high Mn (x>0.7) and low Mn (x<0.3) contents are larger than those with 0.3≤x≤0.7. Raman spectroscopic results show that the Ce1-xMnxO2 (x≠0, 1) samples contain mixed phases of α-Mn2O3 and Ce-Mn-O solid solution, although the presence of α-Mn2O3 phase is not detected in the XRD measurement of the samples with x≤0.7, suggesting that Raman spectroscopy is more sensitive in the structural characterization of Ce1-xMnxO2 samples.

Key wordsCe1-xMnxO2      Sol-gel preparation      N2/adsorption-desorption      XRD      Raman spectrum      TEM     
Received: 12 July 2005      Published: 10 March 2006
Corresponding Authors: XU Bo-Qing     E-mail:
Cite this article:

YE Qing; XU Bo-Qing. Textural and Structure Characterizations of Ce1-xMnxO2Prepared by Citric Acid Sol-Gel Method. Acta Physico-Chimica Sinica, 2006, 22(03): 345-349.

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