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Nguyen L.Q., Phan P.Q., Duong H.N., Nguyen C.D. and Nguyen L.H. Sens. 13, 1754, 2013.

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Article

Electrical and Gas Sensing Behaviour of Polypyrrole/silver Sulphide Nanocomposites

1University Institute of Chemical Technology, North Maharashtra University, Jalgaon, MS


American Journal of Sensor Technology. 2017, Vol. 4 No. 1, 10-20
DOI: 10.12691/ajst-4-1-2
Copyright © 2017 Science and Education Publishing

Cite this paper:
Bharati Yeole, Tanushree Sen, Dharmesh Hansora, Satyendra Mishra. Electrical and Gas Sensing Behaviour of Polypyrrole/silver Sulphide Nanocomposites. American Journal of Sensor Technology. 2017; 4(1):10-20. doi: 10.12691/ajst-4-1-2.

Correspondence to: Satyendra  Mishra, University Institute of Chemical Technology, North Maharashtra University, Jalgaon, MS. Email: profsm@rediffmail.com

Abstract

We investigated the room temperature NH3 sensing performance of polypyrrole/silver sulphide (PPy/Ag2S) nanocomposites (NCs). Sonochemically synthesized Ag2S nanoparticles (80-100 nm) were incorporated into the PPy matrix via ultrasound-assisted in-situ polymerization. The resulting PPy/Ag2S NCs were evaluated based on structural, morphological, and electrical properties. Microscopy results revealed a uniform dispersion of Ag2S nanoparticles in the PPy matrix. We studied the effect of Ag2S nanoparticle concentration on the electrical properties and gas sensing performance of the PPy/Ag2S NCs. The current-voltage (I-V) characteristics revealed the semiconducting nature of the PPy/Ag2S NCs. An improvement in the electrical conductivity was observed for the PPy/Ag2S NC with 3 wt% Ag2S nanoparticle content. PPy/Ag2S NCs were further tested for detection of NH3 in ambient conditions. The PPy/Ag2S NCs exhibited excellent sensor response towards 100 ppm NH3 concentration at room temperature.

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