Effects of carbon content on the photocatalytic activity of C/BiVO4 composites under visible light irradiation

Duk Kyu Lee, In Sun Cho, Sangwook Lee, Shin Tae Bae, Jun Hong Noh, Dong-Wan Kim, Kug Sun Hong

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Carbon-loaded BiVO4 composite photocatalysts were prepared using an impregnation method, and their ability to photocatalytically degrade Rhodamine B dye solution under visible light irradiation was investigated. The prepared composite photocatalysts were characterized by X-ray diffraction (XRD), field-emission electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), Brunauer-Emmett-Teller (BET) surface area measurements, and UV-vis diffuse reflectance spectra. We found that the carbon was well-dispersed on the surface of BiVO4. The photocatalytic activity of the composite photocatalysts for the degradation of Rhodamine B (RhB) in aqueous solution under visible light irradiation (>420 nm) was higher than that of pure BiVO4. Moreover, the degradation efficiency increased as the carbon content increased up to 3 wt%. The mechanism of enhanced photocatalytic activity is discussed with reference to surface area, optical absorption properties, and charge separation.

Original languageEnglish
Pages (from-to)106-111
Number of pages6
JournalMaterials Chemistry and Physics
Volume119
Issue number1-2
DOIs
Publication statusPublished - 2010 Jan 15
Externally publishedYes

Keywords

  • BiVO
  • Carbon
  • Charge separation
  • Composites
  • Photocatalysts
  • Surface area

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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