Preparation of Nanoporous TiO2/SiO2 Composite with Rice Husk as Template and Its Photocatalytic Property

被引：1

作者：

Chen Hui ^{[1
]}

Zhao Lei ^{[1
]}

Wang Xitang ^{[1
]}

Li Shujing ^{[1
]}

Lei Zhongxing ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2015年 / 44卷 / 07期

关键词：

rice husk; template; TiO2/SiO2 nanoporous composite; photodegradation property; SILICA COMPOSITE; TIO2; NANOPARTICLES;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

TiO2/SiO2 nanoporous composite with high anatase content, high specific surface area and good photocatalytic activity was prepared by sol-gel process using rice husk (RE) as template. The thermal behavior, the microstructure and the chemical composition of the composite were characterized by TG-DSC, XRD, FESEM, EDS and nitrogen physisorption. The results show that the transformation of TiO2 from anatase to rutile begins at 700 similar to 800 degrees C and completes at about 1000 degrees C. When the TiO2/SiO2 nanoporous composite is annealed at 500 or 600 degrees C, nano-TiO2 cells are arranged in linear ridges and furrows, and the catalytic activity points are formed. Along with the increase of treatment temperature, nano-TiO2 cells form a layered structure on the surface and fill the pores of RH. TiO2/SiO2 nanoporous composite annealed at 500 degrees C exhibits the highest photodegradation efficiency of methyl blue, which is about 82% within 4 h.

引用

页码：1607 / 1611

页数：5

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