Ammonia sensing properties of polyaniline/α-Fe2O3 hybrid nanocomposites

被引：58

作者：

Bandgar, D. K. ^{[1
]}

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

Mane, A. T. ^{[1
]}

Gupta, S. K. ^{[2
]}

Aswal, D. K. ^{[2
]}

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

机构：

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

[2] Bhabha Atom Res Ctr, Tech Phys Div, Mumbai 400085, Maharashtra, India

来源：

SYNTHETIC METALS | 2015年 / 204卷

关键词：

Conducting polymers; Gas sensors; Morphology; Nanocomposites; XPS; THIN-FILMS; CONDUCTING POLYANILINE; LOW-TEMPERATURE; GAS SENSORS; POLYPYRROLE; ALPHA-FE2O3; FABRICATION; COMPOSITES; VAPOR; XPS;

D O I：

10.1016/j.synthmet.2015.02.032

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Polyaniline (PAni) films modified by different loading of alpha-Fe2O3 nanoparticles have been formed by solid state synthesis method and investigated for various oxidizing and reducing gases. We demonstrates that alpha-Fe2O3 nanoparticles (50%): PAni hybrid nanocomposites films are highly selective to NH3 with high sensitivity (50 at 100 ppm), fast response time (29 s) and highly reproducible response curves. X-ray diffraction analysis, field emission scanning electron microscopy observations, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy analysis revealed that the n-type alpha-Fe2O3 nanoparticle transfers the electrons to polyaniline forms into a incredibly reduced state. These observations in PAni/alpha-Fe2O3 hybrid nanocomposites is insensitive to interaction with other gases except ammonia. The sensing mechanism of PAni/alpha-Fe2O3 hybrid nanocomposites to NH3 was interpreted with the help of proposed energy band diagram. In-addition to this, the interaction mechanism between the NH3 and PAni/alpha-Fe2O3 hybrid nanocomposite was investigated by an impedance spectroscopy tool. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：1 / 9

页数：9

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