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
收藏
页码：115 / 118
页数：4
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