New materials based on modified synthetic Nb2O5 as photocatalyst for oxidation of organic contaminants

被引：112

作者：

Esteves, Andre ^{[1
]}

Oliveira, Luiz C. A. ^{[1
]}

Ramalho, Teodorico C. ^{[1
]}

Goncalves, Maraisa ^{[1
]}

Anastacio, Alexandre S. ^{[1
]}

Carvalho, Hudson W. P. ^{[2
]}

机构：

[1] Univ Fed Lavras, Dept Chem, BR-37200000 Lavras, MG, Brazil

[2] Univ Estadual Paulista, Dept Fisicoquim, Inst Quim Araraquara, BR-14801970 Sao Paulo, Brazil

来源：

CATALYSIS COMMUNICATIONS | 2008年 / 10卷 / 03期

关键词：

Synthetic niobia; Doped; Photocatalysis;

D O I：

10.1016/j.catcom.2008.09.012

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：

Novel materials based on niobia (Nb2O5) destined to oxidize an organic compound in aqueous medium via heterogeneous photocatalysis after chemical modification were synthesized. Niobia was modified by the doping with molybdenum or tungsten and also treated with H2O2. The analysis of the products from methylene blue dye oxidation, with electrospray ionization mass spectrometry, showed that the dye was Successively oxidized to different intermediate compounds. These results strongly Suggest that the oxidation of the organic dye involves oxidizing species mainly generated after the modification of the niobia with Mo or W and also the previous treatment with H2O2. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：330 / 332

页数：3

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