Gas sensors based on doped-CNT/SnO2 composites for NO2 detection at room temperature

被引：85

作者：

Leghrib, R. ^{[1
]}

Felten, A. ^{[2
]}

Pireaux, J. J. ^{[2
]}

Llobet, E. ^{[1
]}

机构：

[1] Univ Rovira & Virgili, MINOS, EMaS, Tarragona 43007, Spain

[2] Univ Namur, LISE, B-5000 Namur, Belgium

来源：

THIN SOLID FILMS | 2011年 / 520卷 / 03期

关键词：

Gas sensors; N- or B-doped carbon nanotubes; Metal oxides; NO2; detection; WALLED CARBON NANOTUBES; TIN OXIDE; ELECTRICAL-PROPERTIES; SENSING PROPERTIES; HYBRID MATERIALS; FILMS; SENSITIVITY; VAPOR;

D O I：

10.1016/j.tsf.2011.04.186

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For the first time nitrogen or boron doped carbon nanotubes were added into a SnO2 matrix to develop a new hybrid CNTs/SnO2 gas sensors. The hybrid sensor is utilised to detect low ppb concentrations of NO2 in air, by measuring resistance changes of thin CNTs/SnO2 films. The tests are performed at room temperature. For comparison, pure SnO2 and N or B-substituted CNT sensors are also examined. Comparative gas sensing results reveal that the CNTs/SnO2 hybrid sensors exhibit much higher response towards NO2, at least by a factor of 10, and good baseline recovery properties at room temperature than the blank SnO2 and the N or B-substituted CNT sensors. This finding shows that doping SnO2 with low quantity of CNTs doped with heteroatoms can dramatically improve sensitivity. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：966 / 970

页数：5

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