http://dx.doi.org/10.1016/S1001-0742(11)60793-6">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

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

Language

English

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. © 2012 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.

Keywords

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

Publication Date

2012

Source Publication Title

Journal of Environmental Sciences

Volume

24

Issue

3

Start Page

449

End Page

457

Publisher

Elsevier

ISSN (print)

10010742

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