TY - JOUR
T1 - Hydrothermal fabrication and visible-light-driven photocatalytic properties of bismuth vanadate with multiple morphologies and/or porous structures for Methyl Orange degradation
AU - Jiang, Haiyan
AU - Dai, Hongxing
AU - Meng, Xue
AU - Zhang, Lei
AU - Deng, Jiguang
AU - Liu, Yuxi
AU - Au, Chak Tong
N1 - Funding Information:
The work was supported by the National Natural Science Foundation of China (No. 20973017, 21077007), the Creative Research Foundation of Beijing University of Technology (No. 00500054R4003, 005000543111501), the Hi-Tech Research and Development Program (863) of China (No. 2009AA063201), and the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality (No. PHR200907105, PHR201007105, PHR201107104). C. T. Au thanks for the financial support from the Hong Kong Baptist University (FRG2/09-10/023). We also thank Jianping He (State Key Laboratory of Advanced Metals and Materials, University of Science & Technology Beijing) for doing the SEM analysis of the samples.
PY - 2012/3
Y1 - 2012/3
N2 - 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.
AB - 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.
KW - Hydrothermal fabrication
KW - Methyl Orange degradation
KW - Photocatalysis
KW - Porous bismuth vanadate
KW - Visible-light-driven catalyst
UR - http://www.scopus.com/inward/record.url?scp=84863275543&partnerID=8YFLogxK
U2 - 10.1016/S1001-0742(11)60793-6
DO - 10.1016/S1001-0742(11)60793-6
M3 - Journal article
C2 - 22655358
AN - SCOPUS:84863275543
SN - 1001-0742
VL - 24
SP - 449
EP - 457
JO - Journal of Environmental Sciences
JF - Journal of Environmental Sciences
IS - 3
ER -