Novel three-dimensional dandelion-like TiO2 structure with high photocatalytic activity

被引：51

作者：

Bal, Xuelian ^{[1
]}

Xie, Bin ^{[1
]}

Pan, Nan ^{[1
]}

Wang, Xiaoping ^{[1
]}

Wang, Haiqian ^{[1
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Anhua 230026, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2008年 / 181卷 / 03期

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

titania; 3D structure; hierarchical structure; hydrothermal; photocatalytic activity;

D O I：

10.1016/j.jssc.2007.12.019

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Pure rutile phase crystalline TiO2 powder with novel 3D dandelion-like structure was synthesized by using a facile hydrothermal method with TiCl3 as the main starting material. In such a 3D structure, the nanometer-scale construction elements aggregate together and form a micrometer-scale artificial unit. The typical 3D dandelion structure has an average diameter of 1.5-2 mu m and is packed radially by nanorods with [001] preference growth direction. Each individual nanorod is hundreds of nanometers in length, and tens of nanometers in diameter. The obtained 3D dandelion-like TiO2 powder has a high photocatalytic activity, which is equivalent to that of the commercial available P25 titania powder. Mechanisms of the formation of the dandelion-like structure were also discussed. A different oxidation process of Ti(III) to Ti(IV) during hydrothermal was suggested. (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：450 / 456

页数：7

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