Efficient photocatalytic degradation of phenol over Co3O4/BiVO4 composite under visible light irradiation

被引：853
作者：
Long, Mingce
Cai, Weimin
Cai, Jun
Zhou, Baoxue
Chai, Xinye
Wu, Yahui
机构：
[1] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China
[2] Harbin Inst Technol, Sch Civil & Environm Engn, Dept Environm Sci & Engn, Harbin 150090, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 41期
关键词：
D O I：
10.1021/jp063441z
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Co3O4/BiVO4 composite photocatalyst with a p-n heterojunction semiconductor structure has been synthesized by the impregnation method. The physical and photophysical properties of the composite photocatalyst have been characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transimission electron microscopy (TEM), BET surface area, and UV-visible diffuse reflectance spectra. Co is present as p-type Co3O4 and disperses on the surface of n-type BiVO4 to constitute a heterojunction composite. The photocatalyst exhibits enhanced photocatalytic activity for phenol degradation under visible light irradiation. The highest efficiency is observed when calcined at 300 degrees C with 0.8 wt % cobalt content. On the basis of the calculated energy band positions and PL spectra, the mechanism of enhanced photocatalytic activity has been discussed.
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页码：20211 / 20216
页数：6
相关论文
共 44 条
[1]   Visible-light photocatalysis in nitrogen-doped titanium oxides [J].
Asahi, R ;
Morikawa, T ;
Ohwaki, T ;
Aoki, K ;
Taga, Y .
SCIENCE, 2001, 293 (5528) :269-271
[2]  
Barreca D, 2001, CHEM MATER, V13, P588, DOI 10.1021/cm00104lx
[3]   A new cobalt oxide electrodeposit bath for solar absorbers [J].
Barrera, E ;
Gonzalez, I ;
Viveros, T .
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 1998, 51 (01) :69-82
[4]   PREDICTION OF FLATBAND POTENTIALS AT SEMICONDUCTOR-ELECTROLYTE INTERFACES FROM ATOMIC ELECTRONEGATIVITIES [J].
BUTLER, MA ;
GINLEY, DS .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1978, 125 (02) :228-232
[5]   Electrical conductivity of Co3O4 films prepared by chemical vapour deposition [J].
Cheng, CS ;
Serizawa, M ;
Sakata, H ;
Hirayama, T .
MATERIALS CHEMISTRY AND PHYSICS, 1998, 53 (03) :225-230
[6]   Cobalt hexafluoroacetylacetonate polyether adducts for thin films of cobalt oxides [J].
Gulino, A ;
Fragalà, I .
INORGANICA CHIMICA ACTA, 2005, 358 (15) :4466-4472
[7]   Electron energy loss spectroscopic investigation of Co metal, CoO, and Co3O4 before and after Ar+ bombardment [J].
Hagelin-Weaver, HAE ;
Hoflund, GB ;
Minahan, DA ;
Salaita, GN .
APPLIED SURFACE SCIENCE, 2004, 235 (04) :420-448
[8]   Visible-light-activated nanoparticle photocatalyst of iodine-doped titanium dioxide [J].
Hong, XT ;
Wang, ZP ;
Cai, WM ;
Lu, F ;
Zhang, J ;
Yang, YZ ;
Ma, N ;
Liu, YJ .
CHEMISTRY OF MATERIALS, 2005, 17 (06) :1548-1552
[9]   Mass production and high photocatalytic activity of ZnS nanoporous nanoparticles [J].
Hu, JS ;
Ren, LL ;
Guo, YG ;
Liang, HP ;
Cao, AM ;
Wan, LJ ;
Bai, CL .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (08) :1269-1273
[10]   Effects of crystal structure on photolysis of H2O on K-Ta mixed oxide [J].
Ishihara, T ;
Baik, NS ;
Ono, N ;
Nishiguchi, H ;
Takita, Y .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 167 (2-3) :149-157
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