Ammonia Gas Sensor Using Polypyrrole-Coated TiO2/ZnO Nanofibers

被引：134

作者：

Wang, Ying ^{[1
]}

Jia, Wenzhao ^{[1
]}

Strout, Timothy ^{[1
]}

Schempf, Ashely ^{[1
]}

Zhang, Heng ^{[2
]}

Li, Baikun ^{[3
]}

Cui, Junhong ^{[4
]}

Lei, Yu ^{[1
]}

机构：

[1] Univ Connecticut, Dept Chem Mat & Biomol Engn, Storrs, CT 06269 USA

[2] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA

[3] Univ Connecticut, Dept Civil & Environm Engn, Storrs, CT 06269 USA

[4] Univ Connecticut, Dept Comp Sci & Engn, Storrs, CT 06269 USA

来源：

ELECTROANALYSIS | 2009年 / 21卷 / 12期

基金：

美国国家科学基金会;

关键词：

Polypyrrole; Nanofibers; NH3; detection; Vapor phase polymerization; Electrospinning; Nanotechnology; Conducting materials; ACUTE LIVER-FAILURE; SENSING BEHAVIORS; CARBON NANOTUBES; NITRIC-OXIDE; FILMS; SENSITIVITY; ENCEPHALOPATHY; CEMENTATION; COMPOSITES; OXIDATION;

D O I：

10.1002/elan.200904584

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Highly porous polypyrrole (PPy)-coated TiO2/ZnO nanofibrous mat has been successfully synthesized. The core TiO2/ZnO nanofibers have an average diameter of ca. 100 nm and the shell of ultrathin PPy layer has a thickness of ca. 7 run. The NH3 gas sensor using the as-prepared material exhibited a fast response over a wide dynamic range and high sensitivity with a detection limit of 60 ppb (S/N= 3). Compared to conventional pristine PPy film, the improved performance in NH3 detection can be attributed to the free access of NH3 to PPy and a minimized gas diffusion resistance through the ultrathin PPy layer.

引用

页码：1432 / 1438

页数：7

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