Photocatalytic activity of TiO2 containing anatase nanoparticles and rutile nanoflower structure consisting of nanorods

被引:73
作者
He, Zhiqiao [1 ]
Cai, Qiaolan [1 ]
Fang, Huiying [1 ]
Situ, Gaohua [1 ]
Qiu, Jianping [1 ]
Song, Shuang [1 ]
Chen, Jianmeng [1 ]
机构
[1] Zhejiang Univ Technol, Coll Biol & Environm Engn, Hangzhou 310032, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
photocatalysis; TiO2; anatase nanoparticles; rutile nanoflowers; simulated solar light illumination; MESOPOROUS MOLECULAR-SIEVES; ROOM-TEMPERATURE SYNTHESIS; HYDROTHERMAL PREPARATION; PARTICLES; OXIDATION; PHOTOREDUCTION; NANOMATERIALS; MORPHOLOGY; GROWTH; WATER;
D O I
10.1016/S1001-0742(12)60318-0
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A series of TiO2 with different crystal phases and morphologies was synthesized via a facile hydrothermal process using titanium n-butoxide and concentrated hydrochloric acid as raw materials. The photocatalytic activity of the samples was evaluated by degradation of Methyl Orange in aqueous solution under UV-Visible light irradiation. On the basis of detailed analysis of the characterizing results of high-resolution transmission electron microscopy, X-ray powder diffraction measurements, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller measurement, it was concluded that the photo-activity of the catalyst is related directly to the 3D morphology and the crystal phase composition. An excellent catalyst should have both a rutile 3D flower-like structure and anatase granulous particles. The 3D flower-like structure could enhance light harvesting, as well as the transfer of reactant molecules from bulk solution to the reactive sites on TiO2. In addition, the optimum anatase/rutile phase ratio was found to be 80:20, which is beneficial to the effective separation of the photogenerated electron-hole pairs.
引用
收藏
页码:2460 / 2468
页数:9
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