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Materials 2015, 8(7), 4273-4286; doi:10.3390/ma8074273

Preparation and Characterization of Surface Photocatalytic Activity with NiO/TiO2 Nanocomposite Structure

1
Institute of Electro-Optical and Materials Science, National Formosa University, Huwei, Yunlin 63201, Taiwan
2
Industrial Technology Research Institute South, Liujia Shiang, Tainan 734, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Wen-Hsiang Hsieh
Received: 24 May 2015 / Revised: 26 June 2015 / Accepted: 3 July 2015 / Published: 13 July 2015
(This article belongs to the Special Issue Selected Papers from ICETI2014)
View Full-Text   |   Download PDF [1120 KB, uploaded 13 July 2015]   |  

Abstract

This study achieved a nanocomposite structure of nickel oxide (NiO)/titanium dioxide (TiO2) heterojunction on a TiO2 film surface. The photocatalytic activity of this structure evaluated by decomposing methylene blue (MB) solution was strongly correlated to the conductive behavior of the NiO film. A p-type NiO film of high concentration in contact with the native n-type TiO2 film, which resulted in a strong inner electrical field to effectively separate the photogenerated electron-hole pairs, exhibited a much better photocatalytic activity than the controlled TiO2 film. In addition, the photocatalytic activity of the NiO/TiO2 nanocomposite structure was enhanced as the thickness of the p-NiO film decreased, which was beneficial for the migration of the photogenerated carriers to the structural surface. View Full-Text
Keywords: nanocomposite structure; NiO/TiO2 heterojunction; photocatalytic activity; inner electrical field; photogenerated electron-hole pair nanocomposite structure; NiO/TiO2 heterojunction; photocatalytic activity; inner electrical field; photogenerated electron-hole pair
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. (CC BY 4.0).

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MDPI and ACS Style

Chen, J.-Z.; Chen, T.-H.; Lai, L.-W.; Li, P.-Y.; Liu, H.-W.; Hong, Y.-Y.; Liu, D.-S. Preparation and Characterization of Surface Photocatalytic Activity with NiO/TiO2 Nanocomposite Structure. Materials 2015, 8, 4273-4286.

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