Articles
  • Hydrothermal synthesis and highly visible light-induced photocatalytic activity of acid functionalized MWCNTs as support for ZnS-photosensitized TiO2 catalysts
  • Lei Zhua, Chang Sung Lima, Ze-Da Menga, Jong-Geun Choia, Chong-Yeon Parka, Trisha Ghosha, Kwang Youn Chob and Won-Chun Oha,*
  • a Department of Advanced Materials Science & Engineering, Hanseo University, Seosan-si, Chungnam-do, 356-706, Korea b Korea Institute of Ceramic Engineering and Technology, Seoul 153-801, Korea
Abstract
Nanoscale ZnS-photosensitized TiO2 particles supported on acid functionalized multi-wall carbon nanotubes (MWCNTs) were prepared via a mild hydrothermal route. The new optical properties and porous structure of the as-prepared samples were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), BET surface area analysis, UV-vis DRS and X-ray diffraction (XRD). The photocatalytic activities of the composite catalysts were evaluated by the decomposition of an MB solution under visible light irradiation. The results indicate that the addition of an appropriate amount of MWCNTs as supports for TiO2 and ZnS efficiently inhibit the agglomeration of ZnS/TiO2 thus improving the dispersion of nanoparticles and the activity of visible photodegradation was remarkably improved.

Keywords: ZnS, MWCNTs, TiO2, Visible-light photocatalysis, Methylene blue.

This Article

  • 2012; 13(3): 283-290

Correspondence to

  • E-mail: