Effect of Substrate Pretreatment on Controllable Growth of TiO_2 Nanorod Arrays

作     者：Minjiang Cao Yuxiang Li Min Guo Mei Zhang Xidong Wang 

作者机构：College of Engineering Peking University Beijing 100871 China Institute of Powder Engineering School of Material Science and Engineering Xi'an University of Architecture andTechnology Xi~an 710055 China Department of Physical Chemistry University of Science and Technology Beijing Beijing 100083 China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2012年第28卷第7期

页      面：577-586页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China (Nos. 50872011 and 50772004) the National Basic Research Program of China ("973 Program", Grant No. 2007CB613608) the New Century Excellent Talents Support Program of Ministry of Education, China (NCET-07-0071, NCET-08-0723) 

主　　题：Titanium dioxide Nanorod arrays Hydrothermal synthesis Photocatalytic properties 

摘      要：Well-aligned TiO2 nanorod arrays （TNAs） were prepared on the pretreated quartz substrates. The effect of the pretreatment conditions on the growth of TNAs was systematically investigated by X-ray diffraction （XRD）, field-emission scanning electron microscopy （FE-SEM） and high-resolution transmission electron microscopy （HRTEM）. It is demonstrated that the pre-coating TiO2 crystal seeds on the substrates can greatly improve the growth orientation of TNAs. Rutile Ti02 crystal seeds induce the nucleation and growth of TNAs more preferably than the anatase TiO2 seeds. The growth density and diameter distribution of TNAs strongly depend on the TiO2 crystal seeds density. It is proved that TNAs with different morphologies can be controllably synthesized by using hydrothermal approach by pretreating substrates. The photocatalytic activity of TNAs was investigated by measuring the photodegradation rate of methyl blue aqueous solution under UV irradiation （254 nm）. And the results show that TNAs with large growth density and small diameter size exhibit relatively higher photocatalytic activity.