Modification of photocatalytic center for photo-epoxidation of propylene by rubidium ion addition to V2O5/SiO2

被引：34

作者：

Amano, F ^{[1
]}

Tanaka, T ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Mol Engn, Kyoto 6158510, Japan

来源：

CATALYSIS COMMUNICATIONS | 2005年 / 6卷 / 04期

关键词：

D O I：

10.1016/j.catcom.2005.01.007

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 photo-oxidation of propylene with molecular oxygen was investigated over silica-supported vanadium oxide catalysts (VS) at 323 K. The addition of Rb ions to VS resulted in the great improvement of the formation rate of propylene oxide in the photo-oxidation of propylene (175 mu mol g(-1) h(-1) for Rb-ion-modified VS, V2O5 loading 0.5 wt%, Rb/V = 1.5). The photocatalytic activity was significantly enhanced when the Rb/V ratio was greater than 1.0. UV-Vis diffuse reflectance and X-ray absorption spectra of a series of Rb-ion-modified VS catalysts indicated the presence of one-to-one interaction between a Rb ion and isolated VO4 tetrahedra over silica. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：269 / 273

页数：5

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