In situ diffuse reflectance FT-IR studies of TiO2 and Pt/TiO2 in photo-oxidation of benzene and ethylene

被引:6
作者
Einaga, Hisahiro [1 ]
Teraoka, Yasutake [1 ]
机构
[1] Kyushu Univ, Fac Engn Sci, Dept Energy & Mat Sci, Fukuoka 8168580, Japan
关键词
photo-oxidation; regeneration; TiO2; benzene; ethylene;
D O I
10.1163/156856708784795536
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In situ diffuse reflectance FT-IR measurements were carried out to investigate the formation and decomposition behavior of by-product compounds on TiO2 and Pt/TiO2 catalyst surfaces during the photo-oxidation of benzene and ethylene. In the benzene photo-oxidation ([benzene] = 100 ppm) without water vapor, TiO2 catalyst was readily covered with oxygen-containing by-product compounds, which were decomposed by, photoirradiation in the presence of water vapor ([H2O] = 0.17%) with an induction period. Pt deposition slightly increased the rate for their decomposition. In the ethylene photo-oxidation ([ethylene] = 400 ppm) without water vapor, oxygen-containing by-product compounds were also formed, which were readily decomposed by photoirradiation in the presence of water vapor without induction period. Pt deposition on TiO2 surface had no significant effect on the photo-oxidation processes.
引用
收藏
页码:617 / 628
页数:12
相关论文
共 13 条
[1]   Photocatalytic destruction of VOCs in the gas-phase using titanium dioxide [J].
Alberici, RM ;
Jardim, WE .
APPLIED CATALYSIS B-ENVIRONMENTAL, 1997, 14 (1-2) :55-68
[2]   Reversible catalyst deactivation in the photocatalytic oxidation of dilute o-xylene in air [J].
Ameen, MM ;
Raupp, GB .
JOURNAL OF CATALYSIS, 1999, 184 (01) :112-122
[3]   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
[4]   Gas-phase oxidation of 1-butene using nanoscale TiO2 photocatalysts [J].
Cao, LX ;
Huang, AM ;
Spiess, FJ ;
Suib, SL .
JOURNAL OF CATALYSIS, 1999, 188 (01) :48-57
[5]   Heterogeneous photocatalytic oxidation of benzene, toluene, cyclohexene and cyclohexane in humidified air:: comparison of decomposition behavior on photoirradiated TiO2 catalyst [J].
Einaga, H ;
Futamura, S ;
Ibusuki, T .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2002, 38 (03) :215-225
[6]   Generation of active sites for CO photooxidation on TiO2 by platinum deposition [J].
Einaga, H ;
Harada, M ;
Futamura, S ;
Ibusuki, T .
JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (35) :9290-9297
[7]   Photocatalytic decomposition of benzene over TiO2 in a humidified airstream [J].
Einaga, H ;
Futamura, S ;
Ibusuki, T .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1999, 1 (20) :4903-4908
[8]  
FU X, 1996, SEMICONDUCTOR NANOCL, P445
[9]   Effects of reaction temperature and water vapor content on the heterogeneous photocatalytic oxidation of ethylene [J].
Fu, XZ ;
Clark, LA ;
Zeltner, WA ;
Anderson, MA .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1996, 97 (03) :181-186
[10]   ELECTRON-PARAMAGNETIC-RES STUDY OF HYDRATED ANATASE UNDER UV IRRADIATION [J].
HOWE, RF ;
GRATZEL, M .
JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (14) :3906-3909