Highly active V-TiO2 for photocatalytic degradation of methyl orange

被引：67

作者：

Liu, Song ^{[1
]}

Xie, Tianhua ^{[1
]}

Chen, Zhi ^{[1
]}

Wu, Jiantao ^{[1
]}

机构：

[1] S China Univ Technol, Dept Appl Chem, Guangzhou 510640, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2009年 / 255卷 / 20期

关键词：

Titania; Vanadium; Doping; Photocatalysis; p-n junction; Semiconductor; VISIBLE-LIGHT IRRADIATION; NANOSTRUCTURED TITANIUM-DIOXIDE; VANADIUM-DOPED TIO2; POLYCRYSTALLINE TIO2; THIN-FILM; COMPOSITE; OXIDATION; PARTICLES; PHOTOOXIDATION; HETEROJUNCTION;

D O I：

10.1016/j.apsusc.2009.06.029

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：

Two kinds of vanadium-doped TiO2 powders photocatalysts were prepared by sol-gel method in even doping and uneven doping modes, and were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV-vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity of TiO2 photocatalysts doped by vanadium evenly with lower dopant level up to 0.002 mol.% is better than that of undoped TiO2, while with higher dopant level the activity is worse. TiO2 photocatalysts doped by vanadium unevenly with a p-n junction semiconductor structure, was shown to have a much higher photocatalytic destruction rate than that of TiO2 photocatalysts doped by vanadium evenly and undoped TiO2, which is ascribed mainly to the electrostatic-field-driven electron-hole separation in TiO2 particles doped by vanadium unevenly. (C) 2009 Elsevier B. V. All rights reserved.

引用

页码：8587 / 8592

页数：6

共 50 条

[1] Efficient complete oxidation of acetaldehyde into CO2 over CuBi2O4/WO3 composite photocatalyst under visible and UV light irradiation [J].

Arai, Takeo ;

Yanagida, Masatoshi ;

Konishi, Yoshinari ;

Iwasaki, Yasukazu ;

Sugihara, Hideki ;

Sayama, Kazuhiro .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (21) :7574-7577

[2] Photocatalytic activity of TiO2 doped with boron and vanadium [J].

Bettinelli, M. ;

Dallacasa, V. ;

Falcomer, D. ;

Fornasiero, P. ;

Gombac, V. ;

Montini, T. ;

Romano, L. ;

Speghini, A. .

JOURNAL OF HAZARDOUS MATERIALS, 2007, 146 (03) :529-534

[3] Preparation and activity evaluation of p-n junction photocatalyst NiO/TiO2 [J].

Chen Shifu ;

Zhang Sujuan ;

Liu Wei ;

Zhao Wei .

JOURNAL OF HAZARDOUS MATERIALS, 2008, 155 (1-2) :320-326

[4] Preparation of a novel TiO2-based p-n junction nanotube photocatalyst [J].

Chen, YS ;

Crittenden, JC ;

Hackney, S ;

Sutter, L ;

Hand, DW .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2005, 39 (05) :1201-1208

[5] THE ROLE OF METAL-ION DOPANTS IN QUANTUM-SIZED TIO2 - CORRELATION BETWEEN PHOTOREACTIVITY AND CHARGE-CARRIER RECOMBINATION DYNAMICS [J].

CHOI, WY ;

TERMIN, A ;

HOFFMANN, MR .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (51) :13669-13679

[6] Selenium-modified titanium dioxide photochemical diode/electrolyte junctions: Photocatalytic and electrochemical preparation, characterization, and model simulations [J].

de Tacconi, NR ;

Chenthamarakshan, CR ;

Rajeshwar, K ;

Tacconi, EJ .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (24) :11953-11960

[7] Photocatalytic degradation of organic compounds in aqueous systems by transition metal doped polycrystalline TiO2 [J].

Di Paola, A ;

García-López, E ;

Ikeda, S ;

Marcì, G ;

Ohtani, B ;

Palmisano, L .

CATALYSIS TODAY, 2002, 75 (1-4) :87-93

[8] Preparation of polycrystalline TiO2 photocatalysts impregnated with various transition metal ions:: Characterization and photocatalytic activity for the degradation of 4-nitrophenol [J].

Di Paola, A ;

Marcì, G ;

Palmisano, L ;

Schiavello, M ;

Uosaki, K ;

Ikeda, S ;

Ohtani, B .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (03) :637-645

[9] Visible light-activated nanosized doped-TiO2 photocatalysts [J].

Fuerte, A ;

Hernández-Alonso, MD ;

Maira, AJ ;

Martínez-Arias, A ;

Fernández-García, M ;

Conesa, JC ;

Soria, J .

CHEMICAL COMMUNICATIONS, 2001, (24) :2718-2719

[10]

GRATZEL M, 1990, J PHYS CHEM-US, V94, P2566, DOI 10.1021/j100369a064

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