Hydrothermal Synthesis of Polyaniline Nano-fibers as H2S Gas Sensor

Abstract

A simple hydrothermal method of synthesis of Polyaniline Nano-fibers was presented. Thin films from PANI have been deposited via spin-coating technique on silicon substrate. The structural, morphological, optical and sensitive properties were Studied for prepared thin films. The XRD results exhibit that the prepared films show crystalline nature of polyaniline Nano-Fibers and that the crystallite size, evaluated by the Scherer formula, is about 30.1 nm. The FE-SEM image of Polyaniline proved that the film prepared have Nano fiber like structure. The optical measurements proved that the optical energy gap was found to be 2.88 eV. The H2S sensing properties of thin films were measured for various operating temperatures, The best sensitivity of 7.32% was observed when operating at a working temperature of 150 °C, also the fast response time and recovery time behavior have been achieved.