Conductometric hydrogen gas sensor based on polypyrrole nanofibers

被引：55

作者：

Al-Mashat, Laith ^{[1
]}

Tran, Henry D.

Wlodarski, Wojtek ^{[1
]}

Kaner, Richard B.

Katantar-Zadeh, Kourosh ^{[1
]}

机构：

[1] RMIT Univ, Sensor Technol Lab, Sch Elect & Comp Engn, Melbourne, Vic 3001, Australia

来源：

IEEE SENSORS JOURNAL | 2008年 / 8卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

conducting polymers; hydrogen sensors; polypyrrole nanofibers;

D O I：

10.1109/JSEN.2008.917476

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Polypyrrole nanofibers are synthesized through a template-free chemical route and used as the active component for hydrogen gas sensing at room temperature. The synthesis of polypyrrole nanofibers was achieved by using bipyrrole as an initiator to speed up the polymerization of pyrrole with Fe 3 as the oxidizing agent. Scanning and transmission electron microscopy studies indicate that the resulting polypyrrole forms a nanofibrous mat with average nanofiber diameter of 18 nm. Fourier transform infrared spectroscopy and elemental analysis confirms that the structure of the nanofibers is comparable to bulk polypyrrole. Gas sensing properties of polypyrrole nanofibers were investigated by depositing nanofiber dispersions on an interdigited conductometric transducer. The sensor performance was tested through programmable exposure towards different concentrations of hydrogen gas diluted in synthetic air in an environmental cell at different temperatures. A short response time of 43 s was observed upon exposure to a concentration of 1% hydrogen with a decrease in film resistance of 312 Omega at room temperature. The sensor sensitivity was analyzed with gradual elevation of the operating temperature.

引用

页码：365 / 370

页数：6

共 28 条

[1]

[Anonymous], 1983, P INT M CHEM SENS FU

[2] CONDUCTING POLYMER GAS SENSORS .3. RESULTS FOR 4 DIFFERENT POLYMERS AND 5 DIFFERENT VAPORS [J].

BARTLETT, PN ;

LINGCHUNG, SK .

SENSORS AND ACTUATORS, 1989, 20 (03) :287-292

[3] CONDUCTING POLYMER GAS SENSORS .2. RESPONSE OF POLYPYRROLE TO METHANOL VAPOR [J].

BARTLETT, PN ;

LINGCHUNG, SK .

SENSORS AND ACTUATORS, 1989, 19 (02) :141-150

[4]

BARTLETT PN, 1991, SENSORS SENSORY SYST, P31

[5] STUDY OF THE ACTION OF GASES ON A POLYPYRROLE FILM [J].

BLANC, JP ;

DEROUICHE, N ;

ELHADRI, A ;

GERMAIN, JP ;

MALEYSSON, C ;

ROBERT, H .

SENSORS AND ACTUATORS B-CHEMICAL, 1990, 1 (1-6) :130-133

[6] ION-EXCHANGE PROPERTIES OF POLYPYRROLE [J].

GE, H ;

WALLACE, GG .

REACTIVE POLYMERS, 1992, 18 (02) :133-140

[7] Meso-substituted [34]octaphyrin(1.1.1.0.1.1.1.0) and corrole formation in reactions of a dipyrromethanedicarbinol with 2,2′-bipyrrole [J].

Geier, GR ;

Grindrod, SC .

JOURNAL OF ORGANIC CHEMISTRY, 2004, 69 (19) :6404-6412

[8] GAS SENSITIVITY OF POLYPYRROLE FILMS TO NO2 [J].

HANAWA, T ;

KUWABATA, S ;

YONEYAMA, H .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1988, 84 :1587-1592

[9] Nanostructured polyaniline sensors [J].

Huang, J ;

Virji, S ;

Weiller, BH ;

Kaner, RB .

CHEMISTRY-A EUROPEAN JOURNAL, 2004, 10 (06) :1314-1319

[10] Polyaniline nanofibers: Facile synthesis and chemical sensors [J].

Huang, JX ;

Virji, S ;

Weiller, BH ;

Kaner, RB .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (02) :314-315

← 1 2 3 →