Oxidation of NO in gas phase by Au-TiO2 photocatalysts prepared by the sol-gel method

被引：11

作者：

Hernandez-Fernandez, J. ^{[1
,2
]}

Aguilar-Elguezabal, A. ^{[1
]}

Castillo, S. ^{[2
]}

Ceron-Ceron, B. ^{[2
]}

Arizabalo, R. D. ^{[2
]}

Moran-Pineda, M. ^{[2
]}

机构：

[1] Ctr Invest Mat Avanzados, Chihuahua 31109, Chih, Mexico

[2] Inst Mexicano Petr, Direcc Invest & Posgrad, Mexico City 07730, DF, Mexico

来源：

CATALYSIS TODAY | 2009年 / 148卷 / 1-2期

关键词：

Titanium dioxide; Gold; Sol-gel; Photocatalysis; VOLATILE ORGANIC-COMPOUNDS; AU/TIO2; CATALYST; LOW-TEMPERATURE; TIO2; PARTICLES; STABILITY; FILMS; OXIDE;

D O I：

10.1016/j.cattod.2009.04.019

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

This work describes an innovative nanosemiconductor system, based on Au-TiO2 for UV photo-assisted oxidation of nitrogen monoxide (NO). The synthesis of these materials was carried out by the sol-gel method. Titanium(IV) isopropoxide and HAuCl4 were the precursors of the photocatalyst, which was prepared in acid conditions. The catalysts were characterized by the following techniques: BET, XRD, UV-vis and dark-field TEM. The evaluation of the photocatalytic activity was performed in situ using an FTIR spectrometer with high sensitivity and a UV spectrometer (365 nm) after 60 min at atmospheric pressure and room temperature. The NO + O-2 Mixture concentration was 150 ppm. The photocatalytic conversion of nitrogen monoxide (NO) was studied by FTIR, which reached 85% in 60 min. The semiconductor type materials exhibited an enhanced photoactivity when compared with our reference TiO2. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：115 / 118

页数：4

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