Visible Light Photocatalytic Performance of Bi2O3/TiO2 Nanocomposite Particles

被引:0
作者
Yang Juan [1 ]
Li Jian-Tong [1 ]
Miao Juan [1 ]
机构
[1] Henan Polytech Univ, Dept Phys & Chem, Jiaozuo 454003, Henan, Peoples R China
关键词
bismuth oxide; TiO2; visible light; photocatalysis; 4-chlorophenol; RHODAMINE-B; NANOPARTICLES; BISMUTH; DEGRADATION; ACID;
D O I
暂无
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Visible-light photoactive Bi2O3/TiO2 catalysts were prepared by sol-hydrothermal process. The as-prepared samples were characterized by XRD, TEM, XPS, UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), FTIR, N-2 adsorption-desorption and ESR. Compounding with low amounts of Bi2O3 could effectively inhibit the phase transformation from anatase to rutile. UV-Vis DRS showed an extension of light absorption into the visible region. ESR results indicated that the active species (center dot OH) was generated with visible illumination (lambda>420 nm). It was found that the optimal dosage of bismuth was 2.0wt%. Proper amount of bismuth species compounded on the TiO2 surface could improve the anatase crystallinity, which could inhibit the recombination between photoelectrons and holes, leading to enhanced photocatalytic quantum efficiency. Meanwhile, the enhanced visible-light activity was tested by the photocatalytic degradation of 4-chlorophenol (4-CP). Furthermore, the generated intermediates were identified using gas chromatograph-mass spectrometer and Bi2O3-photosensitization mechanism under visible light illumination was proposed.
引用
收藏
页码:547 / 555
页数:9
相关论文
共 26 条
[1]   A novel magnetically separable composite photocatalyst: Titania-coated magnetic activated carbon [J].
Ao, Yanhui ;
Xu, Jingjing ;
Fu, Degang ;
Shen, Xunwei ;
Yuan, Chunwei .
SEPARATION AND PURIFICATION TECHNOLOGY, 2008, 61 (03) :436-441
[2]   Photocatalytic activity of CU2O/TiO2, Bi2O3/TiO2 and ZnMn2O4/TiO2 heterojunctions [J].
Bessekhouad, Y ;
Robert, D ;
Weber, JV .
CATALYSIS TODAY, 2005, 101 (3-4) :315-321
[3]   Self-assembly of active Bi2O3/TiO2 visible photocatalyst with ordered mesoporous structure and highly crystallized anatase [J].
Bian, Zhenfeng ;
Zhu, Jian ;
Wang, Shaohua ;
Cao, Yong ;
Qian, Xufang ;
Li, Hexing .
JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (16) :6258-6262
[4]   Coupled semiconductor systems for photocatalysis.: Preparation and characterization of polycrystalline mixed WO3/WS2 powders [J].
Di Paola, A ;
Palmisano, L ;
Venezia, AM ;
Augugliaro, V .
JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (39) :8236-8244
[5]   IR-SPECTRA AND STRUCTURE OF V2O5-GEO2-BI2O3 GLASSES [J].
DIMITROV, V ;
DIMITRIEV, Y ;
MONTENERO, A .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 180 (01) :51-57
[6]   AIR-WATER PARTITIONING AND AQUEOUS SOLUBILITY OF PHENOLS [J].
DOHNAL, V ;
FENCLOVA, D .
JOURNAL OF CHEMICAL AND ENGINEERING DATA, 1995, 40 (02) :478-483
[7]   HETEROGENEOUS PHOTOCATALYSIS [J].
FOX, MA ;
DULAY, MT .
CHEMICAL REVIEWS, 1993, 93 (01) :341-357
[8]  
Fujishima A., 2000, J PHOTOCH PHOTOBIO C, V1, P1, DOI DOI 10.1016/S1389-5567(00)00002-2
[9]   Spray pyrolysed bismuth oxide thin films and their characterization [J].
Gujar, T. P. ;
Shinde, V. R. ;
Lokhande, C. D. .
MATERIALS RESEARCH BULLETIN, 2006, 41 (08) :1558-1564
[10]   ENVIRONMENTAL APPLICATIONS OF SEMICONDUCTOR PHOTOCATALYSIS [J].
HOFFMANN, MR ;
MARTIN, ST ;
CHOI, WY ;
BAHNEMANN, DW .
CHEMICAL REVIEWS, 1995, 95 (01) :69-96