Efficient visible light degradation of rhodamine B by a photo-electrochemical process based on a Bi2WO6 nanoplate film electrode

被引:108
作者
Li, Jinpo
Zhang, Xi
Ai, Zhihui
Jia, Falong
Zhang, Lizhi [1 ]
Lin, Jun
机构
[1] Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China
[2] Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China
关键词
D O I
10.1021/jp070694z
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
In this paper, a Bi2WO6 nanoplate film electrode was prepared by a hydrothermal method, combined with a spin coating technique. A photoelectrochemical (PEC) oxidation system based on this electrode was then constructed to degrade rhodamine B (RhB) in aqueous solution under visible light (lambda > 420 nm). The PEC system based on Bi2WO6 nanoplate film electrode could degrade 87.2% of RhB with concentration of 5 mg/L in 120 min, operated at low voltage and under visible light irradiation, whereas only 36.8% and 39.5% degradation of RhB were observed for electro-oxidation process (EC) and photocatalytic oxidation process (PC), respectively, operated under the same condition. These results revealed a significant synergetic effect on degrading RhB via electro-oxidation and photocatalysis under visible light irradiation. A possible mechanism for this synergetic degradation of RhB was proposed on the basis of characterization results. Meanwhile, the degradation pathway of RhB during PEC under visible light irradiation was also discussed. This study provided an effective approach for aqueous organic pollutant removal by utilizing solar light.
引用
收藏
页码:6832 / 6836
页数:5
相关论文
共 35 条
[1]   Highly efficient liquid-phase photooxidation of an azo dye methyl orange over novel nanostructured porous titanate-based fiber of self-supported radially aligned H2Ti8O17•1.5H2O nanorods [J].
Bao, NZ ;
Feng, X ;
Yang, ZH ;
Shen, LM ;
Lu, XH .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2004, 38 (09) :2729-2736
[2]   Effects of pH and applied potential on photocurrent and oxidation rate of saline solutions of formic acid in a photoelectrocatalytic reactor [J].
Candal, RJ ;
Zeltner, WA ;
Anderson, MA .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (16) :3443-3451
[3]   Effect of transition metal ions on the TiO2-assisted photodegradation of dyes under visible irradiation:: A probe for the interfacial electron transfer process and reaction mechanism [J].
Chen, CC ;
Li, XZ ;
Ma, WH ;
Zhao, JC ;
Hidaka, H ;
Serpone, N .
JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (02) :318-324
[4]   Photosensitized degradation of dyes in polyoxometalate solutions versus TiO2 dispersions under visible-light irradiation:: Mechanistic implications [J].
Chen, CC ;
Zhao, W ;
Lei, PX ;
Zhao, JC ;
Serponer, N .
CHEMISTRY-A EUROPEAN JOURNAL, 2004, 10 (08) :1956-1965
[5]  
CHIHCHENG S, 2000, J MOL CATAL A-CHEM, V151, P133
[6]   PHOTOCATALYTIC DECOLORIZATION OF WASTE-WATER DYES [J].
DAVIS, RJ ;
GAINER, JL ;
ONEAL, G ;
WU, IW .
WATER ENVIRONMENT RESEARCH, 1994, 66 (01) :50-53
[7]   Visible-light-induced degradation of rhodamine B by nanosized Bi2WO6 [J].
Fu, HB ;
Pan, CS ;
Yao, WQ ;
Zhu, YF .
JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (47) :22432-22439
[8]   Synthesis, characterization and photocatalytic properties of nanosized Bi2WO6, PbWO4 and ZnWO4 catalysts [J].
Fu, Hongbo ;
Pan, Chengsi ;
Zhang, Liwu ;
Zhu, Yongfa .
MATERIALS RESEARCH BULLETIN, 2007, 42 (04) :696-706
[9]   Photocatalytic properties of nanosized Bi2WO6 catalysts synthesized via a hydrothermal process [J].
Fu, Hongbo ;
Zhang, Liwu ;
Yao, Wenqing ;
Zhu, Yongfa .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 66 (1-2) :100-110
[10]   Decolourization of textile industry wastewater by the photocatalytic degradation process [J].
Hachem, C ;
Bocquillon, F ;
Zahraa, O ;
Bouchy, M .
DYES AND PIGMENTS, 2001, 49 (02) :117-125