The preparation and mechanism studies of porous titania

被引：22
作者：
Zhao, JZ [1 ]
Wang, ZC [1 ]
Wang, LW [1 ]
Yang, H [1 ]
Zhao, MY [1 ]
机构：
[1] Jilin Univ, Dept Chem, Changchun 130023, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2000年 / 63卷 / 01期
关键词：
titania; porous; surface area;
D O I：
10.1016/S0254-0584(99)00189-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ultrafine porous titania powders were synthesized by precipitating method with titania sulfate and ammonia as raw materials and ethanol as dispersing agent. The influences of pH and reaction temperatures on the texture of titania precursor powders were investigated. The porous titania material was formed by titania precursors calcined above 200 degrees C, and the surface area of powders changes from 541.9 m(2) g(-1) (precursor) to 762.5 m(2) g(-1) (precursors calcined at 200 degrees C). The causes of surface area reduction with calcining temperatures are grain growth and phase transformation. Micropores in porous titania samples were lost by samples calcined above 500 degrees C. On TEM photos space network of porous titania is clearly seen. (C) 2000 Published by Elsevier Science S.A. All rights reserved.
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收藏
页码：9 / 12
页数：4
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