Facile One Step Synthesis And Gas Sensing Behavior Of PANI/Mn3O4 Nanocomposite
Anupma Sharma, Vijay Kumar, Saurav Kumar, Pooja D., Sudeshna Bagchi, Amol P. Bhondekar
Volume 2, Issue 7, Page 450-454, Year 2017 | DOI: 10.5185/amp.2017/710
Keywords: PANI, Mn3O4, nanocomposite, gas sensing, acetone
Abstract: In this work, we present the first investigations of Mn3O4 nanoparticles doped in polyaniline (PANI) matrix for gas sensing application. PANI/Mn3O4 nanocomposite (NC) was synthesized by facile one step reduction method with varied dopant concentrations (1mM and 3mM) of synthesized Mn3O4 nanoparticles followed by its characterization for optical, structural, morphological, thermal and electrical properties. Optical characterization by UV-Vis and FT-IR confirmed the doping of Mn3O4 in polymer matrix. TGA analysis showed improvement in the thermal stability of the NC. SEM images portrayed agglomerated morphology of PANI whereas the NC depicted fibre-like structures symptomatic of more porosity. Gas sensing behavior was investigated towards acetone, ethanol and benzaldehyde vapours. The sensor with 3mM dopant concentration exhibited significant sensing response with a sensitivity of 1.5 at room temperature towards acetone vapour, which can be attributed to the controlled and improved properties at the interface via molecular and supramolecular interactions. The synthesized NC has a potential use as acetone sensor with fast response and recovery. Copyright © 2017 VBRI Press.