Characterization of a carbon xerogel-based sensor for detection of acetone, ethanol, and methanol vapors

被引：16
作者：
Dias, Flavio Silva [1 ,2 ]
Tartuci, Leticia G. [2 ]
Gorgulho, Honoria de Fatima [2 ]
Machado, Wagner Souza [2 ]
机构：
[1] Inst Fed Bahia, Campus Vitoria da Conquista, BR-45075265 Vitoria Da Conquista, BA, Brazil
[2] Univ Fed Sao Joao Del Rei, Dept Ciencias Nat, Campus Dom Bosco, BR-36301160 Sao Joao Del Rei, MG, Brazil
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2016年 / 231卷
关键词：
Carbon xerogel; Gas sensor; Electric properties; Impedance; GAS-SENSING PROPERTIES; ACTIVATED CARBON; FUNCTIONAL-GROUPS; ADSORPTION; COMPOSITE; NANOMATERIALS; REMOVAL; SURFACE; FILMS;
D O I：
10.1016/j.snb.2016.03.054
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We report on the sensing properties of carbon xerogel (CX) for detection of acetone, ethanol, and methanol vapors. The sensor was prepared by deposition of a dispersion of CX dispersion onto an FR4 epoxy resin/fiber glass printed circuit board with interdigitated electrodes. The gas sensing performance was monitored by AC impedance spectroscopy. It was found that exposure to acetone, ethanol, and methanol vapors resulted in a change of sensor impedance that was proportional to the gas concentration. The CX sensor showed greater sensitivity to ethanol and acetone vapor, compared to methanol vapor, indicative of selectivity to larger molecules. However, faster response and recovery times were obtained for methanol vapor, indicative of lower binding energy. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：440 / 449
页数：10
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