Green synthesis and Characterization of Ag-PANI (Polyaniline) Nanocomposite and its Application as a Carboxylate Vapour Sensor

Abstract

This article explains the detection of carboxylate vapour in low quantities, which is crucial for both human health and the chemical industry (minimum 30 ppm and maximum 130 ppm). Results of the production of a silver-polyaniline (Ag-PANI) nanocomposite and an analysis of an optical fibre gas sensor using an evanescent wave were discussed. Here, the sensor was created by depositing Ag-PANI nanocomposite on the cladding of an optical fibre and testing it in the range of 30 ppm to 130 ppm carboxylate vapour concentration from natural extracts. Through the use of X ray diffraction analysis (XRD), field emission scanning electron microscopy (FESEM), and Fourier-transform infrared spectroscopy (FTIR), structural, morphological, and optical features of the produced nanocomposites were examined. A 2.0 mM mole concentration of Ag-PANI nanocomposite was optimised for the experiment. Researchers looked at the fluctuation in carboxylate vapour concentration and the sensing response of optical fibre cladding coated with an improved Ag-PANI nanocomposite (2.0 mM) on carboxylate vapours from a natural extract of lemon juice. At lower concentrations (12 ppm) acetic acid, acetone, ammonia, and ethyl alcohol were detected using the performance of manufactured nanocomposites as a sensor. The Ag-PANI nanocomposite appears to be a promising, economical, and environmentally friendly nanocomposite for high performance carboxylate vapour sensors, and it may be further developed as a prototype in the future for the market.