TY - JOUR
T1 - Enhanced visible-light photocatalytic activities of porous olive-shaped sulfur-doped BiVO4-supported cobalt oxides
AU - Zhao, Zhenxuan
AU - Dai, Hongxing
AU - Deng, Jiguang
AU - Liu, Yuxi
AU - Au, Chak Tong
N1 - Funding Information:
The work was supported by the NSF of China ( 21077007 and 20973017 ), the NSF of Beijing Municipality ( 2102008 ), the Discipline and Postgraduate Education ( 005000541212014 ), the Creative Research Foundation of Beijing University of Technology ( 00500054R4003 and 005000543111501 ), and the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality ( PHR201007105 and PHR201107104 ). CTAU thanks the Hong Kong Baptist University for financial support (FRG2/09-10/023). We also thank Mrs. Jianping He (State Key Laboratory of Advanced Metals & Materials, University of Science and Technology Beijing) for doing the SEM analysis.
PY - 2013/4
Y1 - 2013/4
N2 - 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.
AB - 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.
KW - Methylene blue degradation
KW - Porous olive-like morphology
KW - Sulfur-doped bismuth vanadate
KW - Supported cobalt oxide
KW - Visible-light-driven photocatalyst
UR - http://www.scopus.com/inward/record.url?scp=84874043279&partnerID=8YFLogxK
U2 - 10.1016/j.solidstatesciences.2013.01.009
DO - 10.1016/j.solidstatesciences.2013.01.009
M3 - Journal article
AN - SCOPUS:84874043279
SN - 1293-2558
VL - 18
SP - 98-104A
JO - Solid State Sciences
JF - Solid State Sciences
ER -