Development of Fe2O3-PANI nanocomposite thin film based sensor for NO2 detection

The oxide-polyaniline (alpha-Fe2O3-PANI) films were prepared by spin coating method on various corning glass substrates over Pt inter-digital electrodes (IDEs). The prepared film was characterised using XRD, SEM, AFM, UV-vis and FTIR. Also, it was employed for NO2 sensing. The nanostructured alpha-Fe2O3-PANI film showed a high sensing response similar to 2.29 x 10(2) towards 20 ppm of NO2 gas. Besides giving the higher sensing response towards NO2 gas, alpha-Fe2O3-PANI sensor structure was found to be highly selective and exhibited the poor gas sensing response towards other interfering gases including e.g. Acetone, IPA, NH3, LPG and CO2. The investigated sensor can be used for the detection of NO2 at the industrial level. 2017 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.