Preparation of Ce-TiO2 catalysts by controlled hydrolysis of titanium alkoxide based on esterification reaction and study on its photocatalytic activity

被引:149
作者
Tong, Tianzhong
Zhang, Jinlong
Tian, Baozhu
Chen, Feng
He, Dannong
Anpo, Masakazu
机构
[1] E China Univ Sci & Technol, Adv Mat Lab, Shanghai 200237, Peoples R China
[2] E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China
[3] Shanghai Natl Engn Res Ctr Nanotechnol, Shanghai 200237, Peoples R China
[4] Osaka Prefecture Univ, Grad Sch Engn, Dept Appl Chem, Osaka 5998531, Japan
关键词
titanium dioxide; photodegradation; esterification reaction; visible light; Ce4+ doping;
D O I
10.1016/j.jcis.2007.06.051
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
The Ce-TiO2 catalysts were prepared by controlled hydrolysis of Ti(OC4H9)(4) with water generated "in situ" via an esterification reaction between acetic acid and ethanol, followed by hydrothermal treatment. The samples were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), atomic absorption flame emission spectroscopy (AAS), and nitrogen adsorption-desorption methods. Both of uncloped TiO2 and Ce-TiO2 samples exclusively consist of primary anatase crystallites, which further 'A form spherical aggregates with diameters ranging from 100 to 500 nm. The photocatalytic activity of Ce-TiO2 was investigated for the photocatalytic degradation of Rhodamine B (RB) aqueous solution both under UV and visible light irradiation. Doping of Ce4+ effectively improves the photocatalytic activity under both UV light irradiation and visible light irradiation with an optimal doping concentration of 0.2 and 0.4%, respectively. The photocatalytic mechanisms of Ce-TiO2 catalysts were tentatively discussed. (C) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码:382 / 388
页数:7
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