Preparation of silica microspheres coated with V2O5 xerogel and V2O5/WO3 composite xerogel via adapted Stober process

被引：6

作者：

Barbosa, Glauciane N. ^{[1
]}

Bolsoni, Aline T. ^{[1
]}

Oliveira, Herenilton P. ^{[1
]}

机构：

[1] Univ Sao Paulo, Dept Quim, FFCLRP, BR-14040901 Ribeirao Preto, SP, Brazil

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2008年 / 354卷 / 30期

关键词：

catalysis; electrochemical properties; X-ray diffraction; sol-gels (xerogels);

D O I：

10.1016/j.jnoncrysol.2008.03.029

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the present study, we have synthesized spherical silica particles covered with either layered V2O5 xerogel or V2O5/WO3 mixed xerogel via an adapted Stober method using an ammonia solution of methyltriethoxysilane (MTES). The SEM images revealed the presence of a lamellar V2O5 xerogel layer coating the silica particles, as evidenced by the (00 1) diffraction lines. Both materials have voltammetric behavior that is quite similar to that of the V2O5 xerogel. The catalytic activity of the silica particles coated with the V2O5/WO3 mixed xerogel was evaluated in the epoxidation of styrene using iodosylbenzene as an oxidant. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：3548 / 3553

页数：6

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