Photocatalytic reduction of CO2 with H2O on Ti-MCM-41 and Ti-MCM-48 mesoporous zeolite catalysts

被引:289
作者
Anpo, M
Yamashita, H
Ikeue, K
Fujii, Y
Zhang, SG
Ichihashi, Y
Park, DR
Suzuki, Y
Koyano, K
Tatsumi, T
机构
[1] Univ Osaka Prefecture, Dept Appl Chem, Sakai, Osaka 5998531, Japan
[2] Ion Engn Res Inst Corp, Hirakata, Osaka 5730128, Japan
[3] Univ Tokyo, Sch Engn, Inst Engn Res, Tokyo 1138656, Japan
关键词
photocatalytic reduction of CO2 with H2O; Ti-mesoporous zeolite; Ti-MCM-48; Ti-MCM-41; selective CH3OH formation;
D O I
10.1016/S0920-5861(98)00206-5
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Titanium oxide species included within the framework of mesoporous zeolites (Ti-MCM-41 and Ti-MCM-48) prepared by a hydrothermal synthesis exhibited high and unique photocatalytic reactivity for the reduction of CO2 with H2O at 328 K to produce CH4 and CH3OH in the gas phase. In situ photoluminescence, diffuse reflectance absorption, ESR and XAFS investigations indicated that the titanium oxide species are highly dispersed within the zeolite framework and exist in tetrahedral coordination. The charge transfer excited state of the highly dispersed titanium oxide species played a significant role in the reduction of CO2 with H2O exhibiting a high selectivity for the formation of CH3OH. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:327 / 332
页数:6
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