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

被引：12

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

共 27 条

[1] State of the art and perspectives on materials and applications of photocatalysis over TiO2 [J].

Agrios, AG ;

Pichat, P .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 2005, 35 (7-8) :655-663

[2] Photodegradation of volatile organic compounds (VOCs) and NO for indoor air purification using TiO2:: promotion versus inhibition effect of NO [J].

Ao, CH ;

Lee, SC ;

Mak, CL ;

Chan, LY .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 42 (02) :119-129

[3] Photocatalytic decomposition and reduction reactions of nitric oxide over Degussa P25 [J].

Bowering, N ;

Walker, GS ;

Harrison, PG .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 62 (3-4) :208-216

[4] Photocatalytic oxidation of toluene on nanoscale TiO2 catalysts:: Studies of deactivation and regeneration [J].

Cao, LX ;

Gao, Z ;

Suib, SL ;

Obee, TN ;

Hay, SO ;

Freihaut, JD .

JOURNAL OF CATALYSIS, 2000, 196 (02) :253-261

[5] Catalytic combustion of volatile organic compounds on gold/titanium oxynitride catalysts [J].

Centeno, MA ;

Paulis, M ;

Montes, M ;

Odriozola, JA .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 61 (3-4) :177-183

[6] TiO2 photocatalytic films on stainless steel:: The role of Degussa P-25 in modified sol-gel methods [J].

Chen, YJ ;

Dionysiou, DD .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 62 (3-4) :255-264

[7] Photocatalytic hydrogen production over flame spray pyrolysis-synthesised TiO2 and Au/TiO2 [J].

Chiarello, Gian Luca ;

Selli, Elena ;

Forni, Lucio .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2008, 84 (1-2) :332-339

[8] Photocatalytic oxidation of NOx gases using TiO2:: a surface spectroscopic approach [J].

Dalton, JS ;

Janes, PA ;

Jones, NG ;

Nicholson, JA ;

Hallam, KR ;

Allen, GC .

ENVIRONMENTAL POLLUTION, 2002, 120 (02) :415-422

[9] Effect of pretreatment variables on the reaction of nitric oxide (NO) with Au-TiO2:: DRIFTS studies [J].

Debeila, MA ;

Coville, NJ ;

Scurrell, MS ;

Hearne, GR ;

Witcomb, MJ .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (47) :18254-18260

[10] A golden future for green chemistry [J].

Hutchings, Graham J. .

CATALYSIS TODAY, 2007, 122 (3-4) :196-200

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