Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Hydrothermal Synthesis, Characterization and Improved Activity of a Visible-Light-Driven ZnSe-Sensitized TiO2 Composite Photocatalyst

  • Zhu, Lei (Department of Advanced Materials Science & Engineering, Hanseo University) ;
  • Peng, Mei-Mei (Chemical Engineering Department, Hanseo University) ;
  • Cho, Kwang Youn (Korea Institute of Ceramic Engineering and Technology) ;
  • Ye, Shu (Department of Advanced Materials Science & Engineering, Hanseo University) ;
  • Sarkar, Sourav (Department of Advanced Materials Science & Engineering, Hanseo University) ;
  • Ullah, Kefayat (Department of Advanced Materials Science & Engineering, Hanseo University) ;
  • Meng, Ze-Da (Department of Advanced Materials Science & Engineering, Hanseo University) ;
  • Oh, Won-Chun (Department of Advanced Materials Science & Engineering, Hanseo University)
  • Received : 2013.08.13
  • Accepted : 2013.10.02
  • Published : 2013.11.30
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Abstract

In this study, ZnSe-$TiO_2$ composites were synthesized by a facile hydrothermal-assisted sol-gel process and characterized by nitrogen adsorption isotherms (77 K), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM) and UV-vis diffuse reflectance spectrophotometry. The photocatalytic activity was investigated by decoloration methylene blue (MB), methyl orange (MO), and rhodamine B (Rh.B) in an aqueous solution under visible light irradiation. The results revealed that the photocatalytic activity of the ZnSe-$TiO_2$ photocatalyst was much higher than that of pure$TiO_2$. The ZnSe nanoparticles, which act as a photosensitizer, not only extend the spectral response of $TiO_2$ to the visible region but also reduce charge recombinations.

Keywords

References

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