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International Journal of Photoenergy
Volume 2014, Article ID 893158, 8 pages
http://dx.doi.org/10.1155/2014/893158
Research Article

Preparation of Ni Doped ZnO-TiO2 Composites and Their Enhanced Photocatalytic Activity

School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China

Received 12 May 2014; Revised 10 September 2014; Accepted 10 September 2014; Published 13 October 2014

Academic Editor: Niyaz Mohammad Mahmoodi

Copyright © 2014 Xiaowen Zou 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

Herein, Ni doped ZnO-TiO2 composites were prepared by facile sol-gel approach and were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (UV-Vis DRS), X-ray photoelectron spectroscopy (XPS), and photoluminescence spectroscopy (PL). The results indicated that the Ni ions can be incorporated into the lattice of TiO2 structure and replace Ti. The introduction of Ni expanded light absorption of TiO2 to visible region, increased amount of surface hydroxyl groups and physically adsorbed oxygen (as the electronic scavenges), and then enhanced separation rate of photogenerated carriers. The photodegradation test of reactive brilliant blue (KN-R) under simulated solar light indicated that Ni doped ZnO-TiO2 composites have better photocatalytic activities, as compared to those of TiO2 and ZnO-TiO2.