Effect of Substrate Pretreatment on Controllable Growth of TiO2 Nanorod Arrays

J Mater Sci Technol ›› 2012, Vol. 28 ›› Issue (7): 577-586.

• Nanomaterials and Nanotechnology • Next Articles

Effect of Substrate Pretreatment on Controllable Growth of TiO₂ Nanorod Arrays

Minjiang Gao¹⁾, Yuxiang Li²⁾, Min Guo³⁾, Mei Zhang^3), Xidong Wang¹⁾

1) College of Engineering, Peking University, Beijing 100871, China
2) Institute of Powder Engineering, School of Material Science and Engineering, Xi0an University of Architecture and Technology, Xi'an 710055, China
3) Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China

Received:2011-06-27 Revised:2011-12-19 Online:2012-07-28 Published:2012-07-28
Contact: Xidong Wang
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) and the New Century Excellent Talents Support Program of Ministry of Education, China (NCET-07-0071, NCET-08-0723)

Abstract

Abstract: 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 TiO₂ 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.

Key words: Titanium dioxide, Nanorod arrays, Hydrothermal synthesis, Photocatalytic properties

Minjiang Gao, Yuxiang Li, Min Guo, Mei Zhang, Xidong Wang. Effect of Substrate Pretreatment on Controllable Growth of TiO₂ Nanorod Arrays[J]. J Mater Sci Technol, 2012, 28(7): 577-586.

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Effect of Substrate Pretreatment on Controllable Growth of TiO₂ Nanorod Arrays

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