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Journal of Nanomaterials
Volume 2017, Article ID 6759853, 9 pages
https://doi.org/10.1155/2017/6759853
Research Article

Synthesis and Characterization of the Optical Properties of Pt-TiO2 Nanotubes

1College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350108, China
2College of Civil Engineering, Fuzhou University, Fuzhou 350116, China
3Department of Physics and Electronics, Minjiang University, Fuzhou 350108, China

Correspondence should be addressed to Zhuwu Jiang; moc.621@uwuhzgnaij and Gongduan Fan; nc.ude.uzf@zfdgf

Received 13 January 2017; Revised 25 March 2017; Accepted 28 March 2017; Published 13 August 2017

Academic Editor: Stefano Bellucci

Copyright © 2017 Zhuwu Jiang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Composite Pt-doped TiO2 nanotubes (Pt-TNTs) were synthesized via alkaline fusion-hydrothermal method (AFHM) under ambient atmosphere pressure. Further systematic characterization of Pt-TNTs was performed by using XPS, surface photovoltage spectroscopy (SPS), electric field-induced surface photovoltage spectroscopy (FISPS), UV-Vis diffuse reflectance spectrophotometry (UV-Vis), TEM, and XRD. XPS spectrum showed double peaks which accounted for the presence of platinum dioxide and platinum oxide (PtO2 and PtO, ). Composition analysis showed that the particulate matters on surface of Pt-TNTs were composed of and TiO2. The results of SPS and FISPS demonstrated that the bound exciton showed sub-band gap transition characteristics with the asymmetric changes of photoelectric property corresponding to changes in polarity and strength of the external electric field. Furthermore, the influence of the changed microstructure morphology of Pt-doped TNTs on both the photovoltage spectroscopy and the lifetime of photogenerated carriers which occurred at the interfaces of Pt-TNTs was observed. Result of XRD indicated that a mixture of anatase and rutile phases prevailed in Pt-TNTs. Contact potential barriers consisting of , anatase, rutile, and are presumed to form upon particle that deposited on the surface of Pt-TNTs.