Structural and surface chemical properties of sol-gel derived TiO2-ZrO2 oxides

被引:123
作者
Zou, H [1 ]
Lin, YS [1 ]
机构
[1] Univ Cincinnati, Dept Chem Engn, Cincinnati, OH 45221 USA
关键词
TiO2-ZrO2 binary solid solution; sol-gel; OH group surface density;
D O I
10.1016/j.apcata.2004.01.015
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
Pure titania, zirconia, and binary TiO2-ZrO2 Oxides with Ti/Zr molar ratios of 1:3, 1:1 and 3:1 were prepared by a modified sol-gel method. The samples were calcined at different temperatures and characterized by nitrogen adsorption porosimetry, XRD, DSC-TGA and FT-IR. After calcination at 450degreesC the pure titania and zirconia are in the crystalline phase (anatase and tetragonal, respectively) while the binary oxides remain in the amorphous phase. The binary oxides are crystallized after calcination at temperatures above 800degreesC, but only the TiO2-ZrO2 (1:1) sample is in the single phase of crystalline TiZrO4 while the other two binary oxides contain TiZrO4 and tetragonal (or monoclinc) zirconia and rutile phases, respectively. The crystallization temperature for the formation of ZrTiO4 phase in the three binary oxides increases with titania content (respectively at 606, 716 and 754degreesC). Different from the pure oxides, which exhibit two types of surface OH group, the binary oxides after calcination at 450degreesC only have surface terminal OH group. The OH surface density decreases and, after passing through a minimum at about equimolar composition of Ti/Zr, increases with increasing titania content. The mixed oxides exhibit a large amount of surface acid sites. (C) 2004 Published by Elsevier B.V.
引用
收藏
页码:35 / 42
页数:8
相关论文
共 46 条
[1]   Non-hydrolytic sol-gel process: Zirconium titanate gels [J].
Andrianainarivelo, M ;
Corriu, RJP ;
Leclercq, D ;
Mutin, PH ;
Vioux, A .
JOURNAL OF MATERIALS CHEMISTRY, 1997, 7 (02) :279-284
[2]   EPOXIDE REARRANGEMENT .3. ISOMERIZATION OF 1-METHYLCYCLOHEXENE OXIDE OVER TIO2-ZRO2, NISO4 AND FESO4 [J].
ARATA, K ;
AKUTAGAWA, S ;
TANABE, K .
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1976, 49 (02) :390-393
[3]   Sol gel preparation, structure and thermal stability of crystalline zirconium titanate microspheres [J].
Bhattacharya, AK ;
Mallick, KK ;
Hartridge, A ;
Woodhead, JL .
JOURNAL OF MATERIALS SCIENCE, 1996, 31 (01) :267-271
[4]   UBER DIE CHEMIE DER OBERFLACHE DES TITANDIOXIDS .I. BESTIMMUNG DES AKTIVEN WASSERSTOFFS THERMISCHE ENTWASSERUNG UND REHYDROXYLIERUNG [J].
BOEHM, HP ;
HERRMANN, M .
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1967, 352 (3-4) :156-&
[5]   Preparation and properties of vanadia/titania monolayer catalysts [J].
Bond, GC .
APPLIED CATALYSIS A-GENERAL, 1997, 157 (1-2) :91-103
[6]  
Brinker C. J., 1990, SOL GEL SCI PHYS SCH
[7]   The preparation of high-surface-area zirconia - II. Influence of precipitating agent and digestion on the morphology and microstructure of hydrous zirconia [J].
Chuah, GK ;
Jaenicke, S ;
Pong, BK .
JOURNAL OF CATALYSIS, 1998, 175 (01) :80-92
[8]   Infrared and thermogravimetric study of high pressure consolidation in alkoxide silica gel powders [J].
Costa, TMH ;
Gallas, MR ;
Benvenutti, EV ;
daJornada, JAH .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1997, 220 (2-3) :195-201
[9]   ACIDIC PROPERTIES OF SILICA-ALUMINA GELS AS A FUNCTION OF CHEMICAL COMPOSITION - TITRATION AND CATALYTIC ACTIVITY MEASUREMENTS [J].
DAMON, JP ;
DELMON, B ;
BONNIER, JM .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1977, 73 :372-380
[10]   Preparation, physico-chemical characterization and catalytic activity of sulphated ZrO2-TiO2 mixed oxides [J].
Das, D ;
Mishra, HK ;
Parida, KM ;
Dalai, AK .
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2002, 189 (02) :271-282