Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Enhanced visible-light photocatalytic activities of porous olive-shaped sulfur-doped BiVO4-supported cobalt oxides

Language

English

Abstract

Porous S-doped bismuth vanadate with an olive-like morphology and its supported cobalt oxide (y wt% CoOx/BiVO4-δS 0.08, y = 0.1, 0.8, and 1.6) photocatalysts were fabricated using the dodecylamine-assisted alcohol-hydrothermal and incipient wetness impregnation methods, respectively. It is shown that the y wt% CoOx/BiVO 4-δS0.08 photocatalysts were single-phase with a monoclinic scheetlite structure, a porous olive-like morphology, a surface area of 8.8-9.2 m2/g, and a bandgap energy of 2.38-2.41 eV. There was the co-presence of surface Bi5+, Bi3+, V5+, V 3+, Co3+, and Co2+ species in y wt% CoO x/BiVO4-δS0.08. The 0.8 wt% CoO x/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 CoOx co-doping, higher oxygen adspecies concentration, and lower bandgap energy were responsible for the excellent visible-light-driven catalytic activity of 0.8 wt% CoOx/BiVO4-δS0.08. © 2013 Elsevier Masson SAS. All rights reserved.

Keywords

Methylene blue degradation, Porous olive-like morphology, Sulfur-doped bismuth vanadate, Supported cobalt oxide, Visible-light-driven photocatalyst

Publication Date

2013

Source Publication Title

Solid State Sciences

Volume

18

Start Page

98

End Page

104

Publisher

Elsevier

DOI

10.1016/j.solidstatesciences.2013.01.009

ISSN (print)

12932558

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