Enhancing effects of ultrasound treatment on the preparation of TiO2 photocatalysts

被引：21

作者：

Kim, Sung-Yeon

Chang, Tae-Sun ^{[1
]}

Shin, Chae-Ho

机构：

[1] Chungbuk Natl Univ, Dept Chem Engn, Cheongju 361763, Chungbuk, South Korea

[2] Korea Res Inst Chem Technol, Adv Chem Technol Div, Taejon 350343, South Korea

来源：

CATALYSIS LETTERS | 2007年 / 118卷 / 3-4期

关键词：

TiO2; photoactivity; methylene blue; ultrasound; TiCl4;

D O I：

10.1007/s10562-007-9174-x

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：

TiO2 nanoparticles were synthesized by the hydrolysis and condensation of TiCl4 in a mixed solvent of iso-propyl alcohol and water with or without ultrasound treatment. As-prepared powders were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy filtering transmission electron microscopy (EF-TEM), particle size analysis and BET surface area analysis. The specific surface area, thermal stability and crystallization of the as-prepared samples treated with ultrasound were higher than those of samples treated without ultrasound. To examine the photocatalytic activity of the as-prepared TiO2, the photodegradation of MB which is a typical dye resistant to biodegradation has been investigated on TiO2 powders in aqueous heterogeneous suspensions. The photocatalytic degradation of a aqueous solution of methylene blue shows a remarkable increase when it is carried out with ultrasound in all cases.

引用

页码：224 / 230

页数：7

共 24 条

[1] Photocatalytic decomposition of methylene blue using nanocrystalline anatase titania prepared by ultrasonic technique [J].