INFLUENCE OF THE PREPARATION METHOD ON THE CHARACTERISTICS OF TIO2-CEO2 SUPPORTS

被引：34
作者：
DAUSCHER, A
WEHRER, P
HILAIRE, L
机构：
[1] Laboratoire d'Etude de la Réactivité Catalytique, des Surfaces et Interfaces, URA 1498 du CNRS, Université Louis Pasteur, Strasbourg Cedex, 67070
来源：
CATALYSIS LETTERS | 1992年 / 14卷 / 02期
关键词：
TIO2; CEO2; CETIO3; SOL-GEL PROCESS; XRD; XPS; BET;
D O I：
10.1007/BF00765231
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The preparation by a sol-gel process of TiO2-CeO2 supports (Ce/Ti atomic ratio = 1/1) was studied by varying the sol-gel processing conditions. Starting materials were Ti[OCH(CH3)2]4 and CeCl3.7H2O. The samples were characterised before and after calcination at 400-degrees-C by BET, porosity measurements, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Working in acidic conditions leads to the formation of a compound that induces the growth of CeO2 on amorphous TiO2 during calcination. In a basic medium, a well defined CeTiO3 compound is obtained that allows the formation of a real mixed TiO2-CeO2 compound after calcination. It presents a specific area of 70 m2 g-1, a narrow distribution of mesopores and easily reducible cerium oxide.
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页码：171 / 183
页数：13
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