Room temperature NO2 gas sensor based on PPy/α-Fe2O3 hybrid nanocomposites

被引：72

作者：

Navale, S. T. ^{[1
]}

Khuspe, G. D. ^{[1
]}

Chougule, M. A. ^{[1
]}

Patil, V. B. ^{[1
]}

机构：

[1] Solapur Univ, Funct Mat Res Lab, Sch Phys Sci, Solapur 413255, Maharashtra, India

来源：

CERAMICS INTERNATIONAL | 2014年 / 40卷 / 06期

关键词：

Polymer composites; Metal oxide; X-ray diffraction; NO2 gas sensor; Selectivity; THIN-FILMS; SENSING PROPERTIES; CONDUCTING POLYMER; FABRICATION; SNO2;

D O I：

10.1016/j.ceramint.2013.12.153

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Polypyrrole iron oxide (PPy/alpha-Fe2O3) hybrid nanocomposite sensor films were prepared by spin coating method on glass substrate and characterized for structural and morphological properties by means of X-ray diffraction (XRD), Fourier transform infra red (FTIR) spectroscopy and scanning electron microscopy (SEM), which proved the strong interaction between polypyrrole and alpha-Fe2O3 nanoparticles. The gas-sensing properties of the hybrid nanocomposites were studied and compared with those of PPy and alpha-Fe2O3. It was found that PPy/alpha-Fe2O3 hybrid nanocomposites can complement the drawbacks of pure PPy and alpha-Fe2O3 to some extent. It was revealed that PPy/alpha-Fe2O3 (50%) hybrid sensor operating at room temperature could detect NO2 at low concentration (10 ppm) with very high selectivity (18% compared to C2H5OH) and high sensitivity (56%), with better stability (85%). The sensing mechanism of PPy/alpha-Fe2O3 materials to NO2 was presumed to be the synergism of PPy and alpha-Fe2O3 or the effect of p-n heterojunctions. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：8013 / 8020

页数：8

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