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Synthesis of Sn4+ Doped TiO2 Nanotube and its Photocatalytic Activity

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Abstract:

The PVP+Ti (OC4H9)4+SnCl4·5H2O/sesame oil composite fibers were successfully prepared by a sol-gel method combined with a coaxial electrospinning technique. The Sn4+/TiO2 nanotubes were obtained by calcining the above-mentioned composite fibers and characterized by XRD and TEM. XRD results show that increasing reaction temperature facilitates to form a stable phase. TEM results show that the Sn4+/TiO2 nanotubes have smooth surface with wall thickness of ~120 nm and are composed of small particles of ~5 nm. The photocatalytic activity of Sn4+/TiO2 nanotubes was investigated. The photodegradation efficiency of Sn4+/TiO2 nanotubes decreases in UV region but increases in visible light region. The photocatalytic properties of three 0.52at% Sn4+/TiO2 nanomaterials with different morphologies were also evaluated. The photodegradation efficiencies of Sn4+/TiO2 nanopowers, Sn4+/TiO2 nanofibers and Sn4+/TiO2 nanotubes increase in visible light region in sequence. In summary, chemical modification by doping Sn4+ and morphology changing for TiO2 can improve its photocatalytic activity in visible light region significantly.

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Periodical:

Materials Science Forum (Volume 724)

Pages:

21-24

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.724.21

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Online since:

June 2012

Authors:

Hong Ying Dong, Yan Ping Ren, Kai Ming Huang, Wei Yan He, Wen Ma

Keywords:

Photocatalytic Activity, Sn4+ Doping, TiO2

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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