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
收藏
页码：1432 / 1438
页数：7
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