Tunable Enhancement of a Graphene/Polyaniline/Poly(ethylene oxide) Composite Electrospun Nanofiber Gas Sensor

被引：10

作者：

Burris A.J. ^{[1
]}

Tran K. ^{[2
]}

Cheng Q. ^{[1
,2
]}

机构：

[1] Department of Chemistry, University of California, Riverside, 92521, CA

[2] Environmental Toxicology, University of California, Riverside, 92521, CA

来源：

Journal of Analysis and Testing | 2017年 / 1卷 / 2期

基金：

美国国家科学基金会;

关键词：

Chemiresistor; Composite nanofibers; Electrospinning; Gas sensor; Graphene oxide; Polyaniline;

D O I：

10.1007/s41664-017-0012-x

中图分类号：

学科分类号：

摘要：

Abstract: Electrospun nanofibers of a polyaniline (PANi)/(+)-camphor-10-sulfonic acid (HCSA)/poly(ethylene oxide) (PEO) composite doped with different variants of graphene oxide (GO) were fabricated and evaluated as chemiresistor gas sensors operating at room temperature. A new strategy for enhancing PANi/PEO gas sensor performance is demonstrated using GO dopants reduced via thermal (trGO) or chemical (crGO) routes. By varying the chemical reduction duration (6 h, crGO-6 or 24 h, crGO-24), tunable enhancement of sensor response was achieved. Upon exposure to short-chain aliphatic alcohol vapors, the partially reduced crGO-6 dopant exhibited higher response than GO and crGO-24, suggesting that the dopant enhances sensor performance via increased electrical conductivity over neat GO, and enhanced hydrogen bonding capability over the further-reduced crGO-24 variant. Sensor arrays consisting of PANi/PEO doped with trGO, crGO-6 or crGO-24 moieties successfully identified methanol, ethanol, and 1-propanol vapors using principal component analysis (PCA). Graphical abstract: [Figure not available: see fulltext.]. © 2017, The Nonferrous Metals Society of China and Springer Science+Business Media Singapore.

引用

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