Effect of PEG with different MW as template direction reagent on preparation of porous TiO2/SiO2 with assistance of supercritical CO2

被引：15

作者：

Jiao, Jianxia ^{[2
]}

Xu, Qun ^{[1
]}

Li, Limin ^{[2
]}

Tsubasa, Takano ^{[3
]}

Kobayashi, Takaomi ^{[3
]}

机构：

[1] Zhengzhou Univ, Coll Mat Sci & Engn, Zhengzhou 450052, Peoples R China

[2] Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China

[3] Nagaoka Univ Technol, Dept Chem, Niigata 9402188, Japan

来源：

COLLOID AND POLYMER SCIENCE | 2008年 / 286卷 / 13期

基金：

中国国家自然科学基金;

关键词：

PEG; template; TiO2/SiO2; supercritical CO2; photocatalysis;

D O I：

10.1007/s00396-008-1919-6

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：

Titania-silica composite have been prepared using polyethylene glycol (PEG) with different molecular weights (M-w), PEG20000, PEG10000, and PEG2000, as template in supercritical carbon dioxide (SC CO2). The composite precursors were dissolved in SC CO2 and impregnated into PEG templates using SC CO2 as swelling agent and carrier. After removing the template by calcination at suitable temperature, the titania-silica composite were obtained. The composite were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and nitrogen sorption-desorption experiment. Photocatalytic activity of the samples has been investigated by photo-degradation of methyl orange. Results indicate that there are many Si-O-Ti linkages in the TiO2/SiO2 composite; the PEG template has a significant influence on the structure of TiO2/SiO2. In addition, the TiO2/SiO2 prepared with PEG10000 exhibited high photocatalytic efficiency. So this work supplies a clue to control and obtain the TiO2/SiO2 composite with different photocatalytic reactivity with the aid of suitable PEG template in supercritical CO2.

引用

页码：1485 / 1491

页数：7

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