Hydrothermal fabrication and visible-light-driven photocatalytic properties of bismuth vanadate with multiple morphologies and/or porous structures for Methyl Orange degradation

Haiyan Jiang, Hongxing Dai*, Xue Meng, Lei Zhang, Jiguang Deng, Yuxi Liu, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

Monoclinic BiVO 4 with multiple morphologies and/or porous structures were fabricated using the hydrothermal strategy. The materials were characterized by means of the XRD, Raman, TGA/DSC, SEM, XPS, and UV-Vis techniques. The photocatalytic activities of the BiVO4 materials were evaluated for the degradation of Methyl Orange under visible-light irradiation. It is observed that pH value and surfactant exerted a great effect on the morphology and pore structure of the BiVO 4 product. Spherical BiVO 4 with porous structures, flower-cluster-like BiVO 4, and flower-bundle-like BiVO 4 were generated hydrothermally at 100°C with poly(vinyl pyrrolidone) (PVP) and urea (pH = 2) and at 160°C with NaHCO 3 (pH = 7 and 8), respectively. The PVP-derived BiVO 4 showed much higher surface areas (5.0-8.4 m 2/g) and narrower bandgap energies (2.45-2.49 eV). The best photocatalytic performance of the spherical BiVO 4 material with a surface area of 8.4 m 2/g was associated with its higher surface area, narrower bandgap energy, higher surface oxygen vacancy density, and unique porous architecture.

Original languageEnglish
Pages (from-to)449-457
Number of pages9
JournalJournal of Environmental Sciences
Volume24
Issue number3
DOIs
Publication statusPublished - Mar 2012

Scopus Subject Areas

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

User-Defined Keywords

  • Hydrothermal fabrication
  • Methyl Orange degradation
  • Photocatalysis
  • Porous bismuth vanadate
  • Visible-light-driven catalyst

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