Pd doped WO3 films prepared by sol-gel process for hydrogen sensing

被引：139

作者：

Fardindoost, Somayeh ^{[1
]}

Zad, Azam Iraji ^{[1
,2
]}

Rahimi, Fereshteh ^{[1
]}

Ghasempour, Roghayeh ^{[2
]}

机构：

[1] Sharif Univ Technol, Dept Phys, Tehran 1458889694, Iran

[2] Sharif Univ Technol, Inst Nanosci & Nanotechnol, Tehran 1458889694, Iran

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 02期

关键词：

WO3; Hydrogen sensor; Sol gel; GAS SENSORS; TUNGSTEN; NANOPARTICLES; NANOCRYSTALS; TEMPERATURE; SENSITIVITY; OXYGEN;

D O I：

10.1016/j.ijhydene.2009.11.033

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：

The sol gel method was employed to prepare peroxopolytungstic acid (P-PTA). Palladium chloride salt was dissolved in the sol with different Pd:W molar ratios and coated on Al2O3 substrates by spin coating method. XRD and XPS techniques were used to analyze the crystal structure and chemical composition of the films before and after heat treatment at 500 degrees C. We observed that Pd can modify the growth kinetic of tungsten trioxide nanoparticles by reducing the crystallite size and as a result can improve hydrogen sensitivity. Resistance-sensing measurements indicated sensitivity of about 2.5 x 10(4) at room temperature in hydrogen concentration of 0.1% in air. Considering all sensing parameters, an optimum working temperature of 100 degrees C was obtained. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

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页码：854 / 860

页数：7

相关论文

共 38 条

[1] Sol-gel derived thin-film semiconductor hydrogen gas sensor [J].

Adamyan, A. Z. ;

Adamyan, Z. N. ;

Aroutiounian, V. M. ;

Arakelyan, A. H. ;

Touryan, K. J. ;

Turner, J. A. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2007, 32 (16) :4101-4108

[2] Study of sensitivity and response kinetics changes for SnO2 thin-film hydrogen sensors [J].

Adamyan, A. Z. ;

Adamyan, Z. N. ;

Aroutiounian, V. M. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2009, 34 (19) :8438-8443

[3]

ARBIOL J, 2001, METAL ADDITIVES DIST, P37

[4] Metal oxide hydrogen, oxygen, and carbon monoxide sensors for hydrogen setups and cells [J].

Aroutiounian, Vladimir .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2007, 32 (09) :1145-1158

[5] Reliability of commercially available hydrogen sensors for detection of hydrogen at critical concentrations: Part II - selected sensor test results [J].

Boon-Brett, L. ;

Bousek, J. ;

Moretto, P. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2009, 34 (01) :562-571

[6] Analysis of the noble metal catalytic additives introduced by impregnation of as obtained SnO2 sol-gel nanocrystals for gas sensors [J].

Cabot, A ;

Arbiol, J ;

Morante, JR ;

Weimar, U ;

Bârsan, N ;

Göpel, W .

SENSORS AND ACTUATORS B-CHEMICAL, 2000, 70 (1-3) :87-100

[7] Highly sensitive hydrogen sensor based on suspended, functionalized single tungsten nanowire bridge [J].

Choi, Jungwook ;

Kim, Jongbaeg .

SENSORS AND ACTUATORS B-CHEMICAL, 2009, 136 (01) :92-98

[8] Metal oxide nano-crystals for gas sensing [J].

Comini, Elisabetta .

ANALYTICA CHIMICA ACTA, 2006, 568 (1-2) :28-40

[9] Crystallization study of sol-gel un-doped and Pd-doped TiO2 materials [J].

Crisan, Dorel ;

Dragan, Nicolae ;

Crisan, Maria ;

Raieanu, Malina ;

Braileanu, Ana ;

Anastasescu, Mihai ;

Ianculescu, Adelina ;

Mardare, Diana ;

Luca, Dumitru ;

Marinescu, Virgil ;

Moldovan, Antoniu .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2008, 69 (10) :2548-2554

[10] Synthesis and gas-sensing properties of pd-doped SnO2 nanocrystals.: A case study of a general methodology for doping metal oxide nanocrystals [J].

Epifani, Mauro ;

Arbiol, Jordi ;

Pellicer, Eva ;

Comini, Elisabetta ;

Siciliano, Pietro ;

Faglia, Guido ;

Morante, Joan R. .

CRYSTAL GROWTH & DESIGN, 2008, 8 (05) :1774-1778

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