Morphologically-tunable TiO2 nanorod film with high energy facets: green synthesis, growth mechanism and photocatalytic activity

Changhua Wang; Xintong Zhang; Yanli Zhang; Yan Jia; Bo Yuan; Jikai Yang; Panpan Sun; Yichun Liu

doi:10.1039/C2NR31127E

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Morphologically-tunable TiO₂nanorod film with high energy facets: green synthesis, growth mechanism and photocatalytic activity†

Changhua Wang,^a Xintong Zhang,*^b Yanli Zhang,^b Yan Jia,^b Bo Yuan,^a Jikai Yang,^b Panpan Sun^b and Yichun Liu^b

Author affiliations

* Corresponding authors

^a College of Chemistry and Biology, Beihua University, Jilin, China

^b Centre for advanced optoelectronic functional materials research, Northeast Normal University, Changchun, China
E-mail: xtzhang@nenu.edu.cn
Fax: +86 431 85099772

Abstract

A novel green synthesis strategy was developed to synthesize a film photocatalyst containing anatase TiO₂ nanorods wholly dominated with {100} and {101} facets by employing a simple hydrothermal reaction in the presence of NaCl solution and hydrogen titanate nanosheet array film. The formation mechanism of the anatase TiO₂ nanorods was deduced from X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations, which revealed that the highly reactive {100} facets were derived from the enhanced structural stability of hydrogen titanate induced by Na⁺ and selective adsorption of Cl⁻ on the {100} facets of anatase TiO₂ crystals. Photocatalytic performance has indicated that the TiO₂ nanorods with {100} facet exposure exhibit much higher activities than that of rhombic nanoparticles with {101} facet exposure for the degradation of organic contaminants, which may be primarily ascribed to the high surface energy of {100} facets.

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Article information

DOI: https://doi.org/10.1039/C2NR31127E
Article type: Paper
Submitted: 08 May 2012
Accepted: 12 Jun 2012
First published: 14 Jun 2012

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Nanoscale, 2012,4, 5023-5030

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Morphologically-tunable TiO₂ nanorod film with high energy facets: green synthesis, growth mechanism and photocatalytic activity

C. Wang, X. Zhang, Y. Zhang, Y. Jia, B. Yuan, J. Yang, P. Sun and Y. Liu, Nanoscale, 2012, 4, 5023 DOI: 10.1039/C2NR31127E

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