Gold Nanoparticle-Doped TiO2 Semiconductor Thin Films: Gas Sensing Properties

被引：185

作者：

Buso, Dario ^{[1
]}

Post, Michael ^{[2
]}

Cantalini, Carlo ^{[3
]}

Mulvaney, Paid ^{[4
]}

Martucci, Alessandro ^{[1
]}

机构：

[1] Univ Padua, Dipartimento Ingn Meccan Settore Mat, I-35131 Padua, Italy

[2] Natl Res Council Canada, Inst Chem Proc & Environm Technol, Ottawa, ON K1A 0R6, Canada

[3] Univ Aquila, Dipartimento Chim & Mat, I-67040 Laquila, Italy

[4] Univ Melbourne, Sch Chem, Parkville, Vic 3010, Australia

来源：

ADVANCED FUNCTIONAL MATERIALS | 2008年 / 18卷 / 23期

关键词：

D O I：

10.1002/adfm.200800864

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

TiO2 sol-gel films doped with gold nanoparticles are used as both optical and conductometric sensors for the detection of CO and H-2. Tests performed at 360 degrees C show for the first time CO- and H-2-induced reversible variations in the optical absorption of thin TiO2/Au sol-gel films. The absorbance changes are strongly dependent oil both the testing wavelength and the film microstructure. Together with the sensing dynamics observed through an electric interface, it is possible to obtain a better understanding of the mechanisms involved in the detection of both gases. The presence of H-2 elicits almost ideal, step-like dynamic responses using conductometric detection.

引用

页码：3843 / 3849

页数：7

共 27 条

[1] ELECTRICAL CONDUCTIVITY OF SILICA GEL IN PRESENCE OF ADSORBED WATER [J].

ANDERSON, JH ;

PARKS, GA .

JOURNAL OF PHYSICAL CHEMISTRY, 1968, 72 (10) :3662-&

[2]

[Anonymous], POWD DIFFR FIL

[3]

[Anonymous], POWD DIFFR FIL

[4] FTIR study of carbon monoxide oxidation and scrambling at room temperature over copper supported on ZnO and TiO2 .1. [J].

Boccuzzi, F ;

Chiorino, A .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (09) :3617-3624

[5] FTIR study of carbon monoxide oxidation and scrambling at room temperature over gold supported on ZnO and TiO2 .2. [J].

Boccuzzi, F ;

Chiorino, A ;

Tsubota, S ;

Haruta, M .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (09) :3625-3631

[6] Gold-nanoparticle-doped TiO2 semiconductor thin films:: Optical characterization [J].

Buso, Dario ;

Pacifico, Jessica ;

Martucci, Alessandro ;

Mulvaney, Paul .

ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (03) :347-354

[7] MICROSTRUCTURE AND HUMIDITY-SENSITIVE CHARACTERISTICS OF ALPHA-FE2O3 CERAMIC SENSOR [J].

CANTALINI, C ;

PELINO, M .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1992, 75 (03) :546-551

[8] THE INFLUENCE OF WATER-VAPOR ON CARBON-MONOXIDE SENSITIVITY OF ALPHA-FE2O3 MICROPOROUS CERAMIC SENSORS [J].

CANTALINI, C ;

FACCIO, M ;

FERRI, G ;

PELINO, M .

SENSORS AND ACTUATORS B-CHEMICAL, 1994, 19 (1-3) :437-442

[9] Evidence for the role of colloidal palladium in the catalytic formation of H2O2 from H2 and O2 [J].

Dissanayake, DP ;

Lunsford, JH .

JOURNAL OF CATALYSIS, 2002, 206 (02) :173-176

[10] Catalytic oxidation of hydrogen over Au/TiO2 catalysts [J].

Dyrbeck, H. ;

Hammer, N. ;

Ronning, M. ;

Blekkan, E. A. .

TOPICS IN CATALYSIS, 2007, 45 (1-4) :21-24

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