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Vol. 25 No. 2 (2013): Vol 25 Issue 2

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Hydrothermal Synthesis and Visible Light Photocatalytic Behaviour of Ag2S and Ag2S-TiO2 Nanoparticles

https://doi.org/10.14233/ajchem.2013.12738
Lei Zhu
Department of Advanced Materials Science & Engineering, Hanseo University, Chungnam 356-706, South Korea
Ze-Da Meng
Department of Advanced Materials Science & Engineering, Hanseo University, Chungnam 356-706, South Korea
Chong-Yeon Park
Department of Advanced Materials Science & Engineering, Hanseo University, Chungnam 356-706, South Korea
Trisha Ghosh
Department of Advanced Materials Science & Engineering, Hanseo University, Chungnam 356-706, South Korea
Won-Chun Oh
Department of Advanced Materials Science & Engineering, Hanseo University, Chungnam 356-706, South Korea

Corresponding Author(s) : Won-Chun Oh

wc_oh@hanseo.ac.kr

Asian Journal of Chemistry, Vol. 25 No. 2 (2013): Vol 25 Issue 2

Abstract

A simple route to syntheisze nanocrystalline Ag2S-modified TiO2 photocatalyst by a hydrothermal method was developed. The visible light photocatalytic activity of the obtained samples for the degradation of methyl orange was studied. The products were characterized by XRD, EDX SEM, TEM, BET and UV-VIS absorption spectroscopy. The materials characterization showed that the presence of Ag2S onto TiO2 surface results in a blue shift of the material band edge when compared with the initial semiconductor. The introduction of Ag2S can lead to a shift in the absorption band of the Ag2S/TiO2 composite into the visible light region due to the excellent photoelectric characteristics of Ag2S. The material with the best catalytic activity towards the photodecolorization of methyl orange was the 30 mg of TiO2 modified with Ag2S nanoparticles.

Keywords

Sliver sulphide Titanium dioxide Visible light photocatalytic properties Methyl orange
Zhu, L., Meng, Z.-D., Park, C.-Y., Ghosh, T., & Oh, W.-C. (2012). Hydrothermal Synthesis and Visible Light Photocatalytic Behaviour of Ag2S and Ag2S-TiO2 Nanoparticles. Asian Journal of Chemistry, 25(2), 726–730. https://doi.org/10.14233/ajchem.2013.12738
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