Room temperature vanadium dioxide-carbon nanotube gas sensors made via continuous hydrothermal flow synthesis

被引：64

作者：

Evans, Gwyn P. ^{[1
,2
]}

Powell, Michael J. ^{[2
]}

Johnson, Ian D. ^{[2
]}

Howard, Dougal P. ^{[2
]}

Bauer, Dustin ^{[2
]}

Darr, Jawwad A. ^{[2
]}

Parkin, Ivan P. ^{[2
]}

机构：

[1] UCL, Dept Secur & Crime Sci, 35 Tavistock Sq, London WC1H 9EZ, England

[2] UCL, Dept Chem, Gordon St, London WC1H 0AJ, England

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2018年 / 255卷

基金：

英国工程与自然科学研究理事会;

关键词：

Gas sensor; Carbon nanotubes; Vandium oxides; Continous hydrothermal flow synthesis; Humidity sensing; Ammonia gas; HUMIDITY SENSING PROPERTIES; CROSS-SENSITIVITY; PHASE-TRANSITION; THIN-FILMS; AMMONIA; VO2; OXIDES; NH3; NANOMATERIALS; NANORODS;

D O I：

10.1016/j.snb.2017.07.152

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Vanadium dioxide-carbon nanotube (VO2-CNT) nanocomposite materials were produced via a continuous hydrothermal flow synthesis (CHFS) method. The composites were made in a single step from CHFS using dispersions of commercially available single-walled carbon nanotubes (SWCNTs) or multi-walled carbon nanotubes (MWCNTs) in a metal salt solution (aq.). The room temperature gas sensing characteristics of the VO2-CNT nanocomposites were investigated and compared with sensors of CHFS-made VO2 without added carbon. The VO2-CNT nanocomposites were found to display high sensitivity to H2O vapour, showing excellent potential as humidity sensors. Furthermore, p-type responses to ammonia gas were observed, with the VO2 (no carbon) sensors showing the largest response. Overall, surface composition and microstructure were found to greatly influence sensor responses to H2O vapour and NH3 gas. (C) 2017 Published by Elsevier B.V.

引用

页码：1119 / 1129

页数：11

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