Platinization of sunlight active Ti-W mixed oxide photocatalysts

被引：14
作者：
Fernandez-Garcia, M.
Fuerte, A.
Hernandez-Alonso, M. D.
Soria, J.
Martinez-Arias, A.
机构：
[1] CSIC, Inst Catalisis & Petr Quim, Madrid 28049, Spain
[2] CIEMAT, Dept Energia, E-28040 Madrid, Spain
来源：
JOURNAL OF CATALYSIS | 2007年 / 245卷 / 01期
关键词：
photocatalysis; binary Ti-W mixed oxides; TiO2; anatase; platinization; visible and sunlight light absorption and excitation; pollutant and toluene mineralization and degradation;
D O I：
10.1016/j.jcat.2006.09.023
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：
The photocatalytic effects of the platinization on sunlight-active nanosize Ti-W mixed oxide materials with anatase structure were investigated. Platinization was shown to promote the photocatalytic mineralization of toluene, leading to an enhanced reaction rate of ca. 2.3 with respect to the parent Ti-W mixed oxide. This reaction rate increase is significantly higher than that obtained using ultraviolet excitation for titania-based oxides in the degradation of toluene and seems intimately related to the presence of Pt-O bonds located at the platinum-anatase inter-face. The chemical/physical bases of such behavior are discussed on the light of a structural/electronic characterization of the solids with the help of X-ray diffraction and Raman/UV-visible spectroscopy, along with additional in situ experiments run under sunlight excitation using infrared and electron paramagnetic resonance spectroscopy. (c) 2006 Elsevier Inc. All rights reserved.
引用
收藏
页码：84 / 90
页数：7
相关论文
共 38 条
[1]  
Anpo M., 2000, Stud. Surf. Sci. Catal, V130, P157, DOI [DOI 10.1016/S0167-2991(00)80952-0, 10.1016/S0167-2991(00)80952-0]
[2]   Oxide semiconductor materials for solar light energy utilization [J].
Arakawa, H ;
Sayama, K .
RESEARCH ON CHEMICAL INTERMEDIATES, 2000, 26 (02) :145-152
[3]   Steady-state surface species during toluene photocatalysis [J].
Blount, MC ;
Falconer, JL .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2002, 39 (01) :39-50
[4]   Characterization of adsorbed species on TiO2 after photocatalytic oxidation of toluene [J].
Blount, MC ;
Falconer, JL .
JOURNAL OF CATALYSIS, 2001, 200 (01) :21-33
[5]   Phenol decomposition using Mn+/TiO2 photocatalysts supported by the sol-gel technique on glass fibres [J].
Brezova, V ;
Blazkova, A ;
Karpinsky, L ;
Groskova, J ;
Havlinova, B ;
Jorik, V ;
Ceppan, M .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1997, 109 (02) :177-183
[6]   FT-IR CHARACTERIZATION OF THE SURFACE-ACIDITY OF DIFFERENT TITANIUM-DIOXIDE ANATASE PREPARATIONS [J].
BUSCA, G ;
SAUSSEY, H ;
SAUR, O ;
LAVALLEY, JC ;
LORENZELLI, V .
APPLIED CATALYSIS, 1985, 14 (1-3) :245-260
[7]   Photocatalytic oxidation of toluene on nanoscale TiO2 catalysts:: Studies of deactivation and regeneration [J].
Cao, LX ;
Gao, Z ;
Suib, SL ;
Obee, TN ;
Hay, SO ;
Freihaut, JD .
JOURNAL OF CATALYSIS, 2000, 196 (02) :253-261
[8]   Visible light induced photocatalytic degradation of organic pollutants [J].
Chatterjee, D ;
Dasgupta, S .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 2005, 6 (2-3) :186-205
[9]   EFFECTS OF METAL-ION DOPANTS ON THE PHOTOCATALYTIC REACTIVITY OF QUANTUM-SIZED TIO2 PARTICLES [J].
CHOI, WY ;
TERMIN, A ;
HOFFMANN, MR .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1994, 33 (10) :1091-1092
[10]   Photodegradation catalyst screening by combinatorial methodology [J].
Dai, QX ;
Xiao, HY ;
Li, WS ;
Na, YQ ;
Zhou, XP .
APPLIED CATALYSIS A-GENERAL, 2005, 290 (1-2) :25-35
1234