Department of Chemistry
Hydrothermal fabrication and visible-light-driven photocatalytic properties of bismuth vanadate with multiple morphologies and/or porous structures for Methyl Orange degradation
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.
Hydrothermal fabrication, Methyl Orange degradation, Photocatalysis, Porous bismuth vanadate, Visible-light-driven catalyst
Source Publication Title
Journal of Environmental Sciences
Link to Publisher's Edition
Jiang, Haiyan, Hongxing Dai, Xue Meng, Lei Zhang, Jiguang Deng, Yuxi Liu, and Chak Tong Au. "Hydrothermal fabrication and visible-light-driven photocatalytic properties of bismuth vanadate with multiple morphologies and/or porous structures for Methyl Orange degradation." Journal of Environmental Sciences 24.3 (2012): 449-457.