Enhancement of ethanol gas sensing response based on ordered V2O5 nanowire microyarns

被引：74

作者：

Jin, Wei ^{[1
]}

Yan, Shilin ^{[1
]}

An, Li ^{[2
,3
]}

Chen, Wen ^{[2
,3
]}

Yang, Shuang ^{[2
,3
]}

Zhao, Chunxia ^{[2
,3
]}

Dai, Ying ^{[2
,3
]}

机构：

[1] Wuhan Univ Technol, Sch Sci, Wuhan 430070, Peoples R China

[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[3] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2015年 / 206卷

基金：

对外科技合作项目（国际科技项目）; 中国国家自然科学基金;

关键词：

Ultralong; V2O5; nanowire; Microyarns; Selectivity; Gas sensor; CARBON NANOTUBE YARNS; SPECTROSCOPIC ELLIPSOMETRY; METAL-OXIDES; SENSITIVITY; AMMONIA; SENSORS; NANOPARTICLES; MORPHOLOGY; NANOBELTS; ARRAYS;

D O I：

10.1016/j.snb.2014.09.064

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this paper, a prototype V2O5 nanowire microyarns-based gas sensor with high response and selectivity for ethanol was developed. The V2O5 nanowire yarns were directly spun from ultralong V2O5 nanowires viscous solution. This process is very similar to drawing a thread from a silk cocoon. The microyarns wound around alumina tubes like a spiral were tested for gas sensing toward ethanol, methanol, ammonia and toluene gases. It was found that the microyarns exhibit good response and selectivity to ethanol. The response of the yarns reaches the maximum value of 9.09 to 1000 ppm ethanol at 330 degrees C, which is around 3.5 times higher than that of the randomly ultralong nanowires. In contrast, only very little response was observed for methanol, ammonia and toluene, which indicated that V2O5 nanowire microyarns would be a potential candidate for practical gas detector. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：284 / 290

页数：7

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