Porous FeOx/BiVO4-δS0.08: Highly efficient photocatalysts for the degradation of Methylene Blue under visible-light illumination

Zhenxuan Zhao, Hongxing Dai*, Jiguang Deng, Yuxi Liu, Yuan Wang, Xinwei Li, Guangmei Bai, Baozu Gao, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Porous S-doped bismuth vanadate with an olive-like morphology and its supported iron oxide (y wt.% FeOx/BiVO4-δS0.08, y = 0.06, 0.76, and 1.40) photocatalysts were fabricated using the dodecylamine-assisted alcohol-hydrothermal and incipient wetness impregnation methods, respectively. It is shown that the y wt.% FeOx/BiVO4-δS0.08 photocatalysts contained a monoclinic scheetlite BiVO4 phase with a porous olive-like morphology, a surface area of 8.8-9.2 m2/g, and a bandgap energy of 2.38-2.42 eV. There was co-presence of surface Bi5+, Bi3+, V5+, V3+, Fe3+, and Fe2+ species in y wt.% FeOx/BiVO4-δS0.08. The 1.40 wt.% FeOx/BiVO4-δS0.08 sample performed the best for Methylene Blue degradation under visible-light illumination. The photocatalytic mechanism was also discussed. We believe that the sulfur and FeOx co-doping, higher oxygen adspecies concentration, and lower bandgap energy were responsible for the excellent visible-light-driven catalytic activity of 1.40 wt.% FeOx/BiVO4-δS0.08.

Original languageEnglish
Pages (from-to)2138-2149
Number of pages12
JournalJournal of Environmental Sciences
Volume25
Issue number10
DOIs
Publication statusPublished - 1 Oct 2013

Scopus Subject Areas

  • Environmental Engineering
  • Environmental Chemistry
  • Environmental Science(all)

User-Defined Keywords

  • Methylene Blue degradation
  • Porous morphology
  • Sulfur-doped bismuth vanadate
  • Supported iron oxide
  • Visible-light-driven photocatalyst

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