Visible light assisted photocatalytic activity of TiO2-metal vanadate (M=Sr, Ag and Cd) nanocomposites

K. Vignesh, R. Hariharan, M. Rajarajan, A. Suganthi

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TiO2-metal vanadate nanocomposites (TiO2-MV) were synthesized by the precipitation method and successfully characterized using UV-visible diffuse reflectance spectroscopy (UV-vis-DRS), powder X-ray diffraction (XRD), photoluminescence (PL) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX) techniques. The photocatalytic activity of TiO 2-MV was investigated for the degradation of fast green (FG) dye under visible light irradiation. The photocatalytic activity of TiO 2-silver vanadate [TiO2-Ag3VO4] was found to be much higher than that of TiO2-cadmium vanadate [TiO 2-CdV2O6], TiO2-strontium vanadate [TiO2-Sr3(VO4)2] and TiO 2. The effect of operational parameters such as pH, photocatalyst concentration and initial dye concentration on the photodegradation of FG was examined in detail. The mineralization of FG was confirmed by chemical oxygen demand (COD) and total organic carbon (TOC) measurements. Moreover, TiO 2-Ag3VO4 was found to be a reusable photocatalyst.

Original languageEnglish
Pages (from-to)1521-1530
Number of pages10
JournalMaterials Science in Semiconductor Processing
Issue number6
Publication statusPublished - 2013
Externally publishedYes



  • Metal vanadate
  • Nanocomposite
  • Photocatalysis
  • TiO
  • Visible light

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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