INSTITUTIONAL DIGITAL REPOSITORY

Effect of multi-walled carbon nanotubes on DC electrical conductivity and acetone vapour sensing properties of polypyrrole

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dc.contributor.author Husain, A.
dc.contributor.author Mahajan, D.K.
dc.date.accessioned 2022-11-21T16:31:59Z
dc.date.available 2022-11-21T16:31:59Z
dc.date.issued 2022-11-21
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/4215
dc.description.abstract Polypyrrole (PPy) and polypyrrole/multi-walled carbon nanotubes nanocomposite (PPy/MWCNTs) were synthesized and characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmittance electron microscopy (TEM) and thermogravimetric analysis (TGA). PPy and PPy/MWCNTs were converted into pellets which were used in conductivity and acetone sensing experiments. The initial electrical conductivity of PPy increased from 0.16 Scm−1 to 2.27 Scm−1 by loading of MWCNTs into PPy matrix. At the same time, PPy/MWCNTs showed excellent conductivity retention properties as compared to PPy under both the isothermal and cyclic ageing conditions. A comparative acetone vapour sensing studies were carried out on PPy and PPy/MWCNTs sensors at different acetone concentration, i.e., 0.5, 0.4, 0.3, 0.2, 0.1, 0.05, 0.04, 0.03, 0.02 and 0.01 vol%. The PPy/MWCNTs sensor offered much-improved acetone vapour sensing performance as compared to PPy in terms of sensing response, reversibility and long term stability. PPy/MWCNTs sensor exhibited 2.44, 2.82, 3.06, 3.28, 3.88, 5.0, 5.42, 6.02, 6.08 and 7.44 times greater% sensing response than PPy sensor at 0.5, 0.4, 0.3, 0.2, 0.1, 0.05, 0.04, 0.03, 0.02 and 0.01 vol% acetone concentration, respectively. en_US
dc.language.iso en_US en_US
dc.subject Acetone vapour sensing en_US
dc.subject DC electrical conductivity en_US
dc.subject Multi-walled carbon nanotubes en_US
dc.subject Nanocomposite en_US
dc.subject Polypyrrole en_US
dc.title Effect of multi-walled carbon nanotubes on DC electrical conductivity and acetone vapour sensing properties of polypyrrole en_US
dc.type Article en_US


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