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Advances in Materials Science and Engineering
Volume 2012, Article ID 348927, 5 pages
http://dx.doi.org/10.1155/2012/348927
Research Article

Synthesis and Characterization of Fe-N-S-tri-Doped Photocatalyst and Its Enhanced Visible Light Photocatalytic Activity

1College of Resource and Environment, Northeast Agricultural University, Wood Sreet 59, Xiangfang District, Harbin 150030, China
2Department of Environmental Science and Engineering, Heilongjiang University, Xuefu Road 74, Nangang District, Harbin 150080, China
3State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Department of Environmental Science and Engineering Harbin Institute of Technology, Huanghe Road 73, Nangang District, Harbin 150090, China

Received 19 October 2011; Accepted 8 December 2011

Academic Editor: Guohua Jiang

Copyright © 2012 Biying Li 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

Fe-N-S-tri-doped photocatalysts were synthesized by one step in the presence of ammonium ferrous sulfate. The resulting materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflection spectrum (UV-Vis DRS). XPS analysis indicated that Fe (III) and S6+ were incorporated into the lattice of through substituting titanium atoms, and N might coexist in the forms of substitutional N (O-Ti-N) and interstitial N (Ti-O-N) in tridoped . XRD results showed that tri-doping with Fe, N, and S elements could effectively retard the phase transformation of from anatase to rutile and growth of crystallite size. DRS results revealed that the light absorbance edge of in visible region was greatly improved by tri-doping with Fe, N, and S elements. Further, the photocatalytic activity of the as-synthesized samples was evaluated by the degradation of phenol under visible light irradiation. It was found that Fe-N-S-tri-doped catalyst exhibited higher visible light photocatalytic activity than that of pure and P25 , which was mainly attributed to the small crystallite size, intense light absorbance in visible region, and narrow bandgap energy.