Analysis of sensing properties of thermoelectric vapor sensor made of carbon nanotubes/ethylene-octene copolymer composites

被引：20
作者：
Slobodian, Petr [1 ]
Riha, Pavel [2 ]
Olejnik, Robert [1 ]
Benlikaya, Ruhan [3 ]
机构：
[1] Tomas Bata Univ, Univ Inst, Ctr Polymer Syst, Trida T Bati 5678, Zlin 76001, Czech Republic
[2] Acad Sci Czech Republ, Inst Hydrodynam, Patankou 5, Prague 16612 6, Czech Republic
[3] Balikesir Univ, Dept Secondary Sci & Math Educ, TR-10100 Balikesir, Turkey
来源：
CARBON | 2016年 / 110卷
关键词：
GAS SENSOR; COMBUSTION CATALYST; CHEMICAL OXIDATION; SURFACE; NETWORK; PERFORMANCE; METHANE; FUNCTIONALIZATION;
D O I：
10.1016/j.carbon.2016.09.023
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We designed a novel self-powered thermoelectric vapor sensor, whose thermogenerated voltage was modulated by chemical vapors. The sensor was made of composites of oxidized multi-walled carbon nanotubes within ethylene-octene copolymer. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy of the multi-walled carbon nanotubes within ethylene-octene copolymer showed that the oxidation with HNO3 or KMnO4 enhanced its p-type electrical conductivity and that the thermoelectric power increase was proportional to the formation of new oxygen-containing functional groups on the surface of carbon nanotubes. When this composite was subjected to a saturated vapor of either heptane (aliphatic hydrocarbon), toluene (aromatic hydrocarbon) or ethanol (alcohol), its respective relative resistance increased in average by 3.6, 1.1 and 0.05. Consequently, the magnitude of voltage generated by the thermoelectric device containing the oxidized multi-walled carbon nanotubes within ethylene-octene copolymer determined the absence or presence of the aforementioned chemical vapors. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：257 / 266
页数：10
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