Sonochemical deposition and characterization of nanophasic TiO2 on silica particles

被引：0
作者：
Guo, Wei-Lin [1 ]
Yang, Zhong-Xi
Wang, Xi-Kui
机构：
[1] Jinan Univ, Sch Chem & Chem Engn, Jinan 250022, Peoples R China
[2] Jinan Univ, Sch Mat Sci & Engn, Jinan 250022, Peoples R China
来源：
MATERIALS RESEARCH INNOVATIONS | 2006年 / 10卷 / 01期
关键词：
sonochemistry; titanium dioxide; silica P; hotocatalysis; coating;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel sonochemical approach for the preparation of nanophasic TiO2 particles coated on silica carriers, in which TICl4 precursor as an in situ source for the coating phase of TiO2, has been described. TiO2 clusters in the size range of about 4nm have been deposited on silica particles by the sonication of a suspension containing TiCl4 and silica particles in water by a high-intensity ultrasound radiation (24KHz, 100W/cm2). The TiO2/silica samples have been characterized by Raman spectra, UV/Vis DRS, and FT-IR spectra. The surface titanate of TiO2/silica samples is a mixture of isolated TiO4 species and anatase crystallite. The work has also been addressed to study the effect of the different reaction conditions on the TiO2/silica samples and their effect in the photocatalytic activity. The TiO2/silica photocatalysts exhibited higher reactivity than bulk TiO2 (P25, Degussa) in photo-oxidation of methyl orange.
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页码：11 / +
页数：6
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