Effect of sensing temperature on the ammonia gas sensor based on polypyrrole-graphene oxide nano-composite
Paper ID : 1300-ICNS
Authors:
Atefeh Darvish Shahmoradi *
Department of Chemistry, Factually of basic Science, Tarbiat Modares University, Tehran, P.O. Box 14115‐175, Iran
Abstract:
Abstract: In this project, pyrrole was polymerized uniformly on the surface of graphene oxide (GO) by in situ polymerization method. According to the obtained appropriate solubility of PPy/GO nano-composite in organic solvents such as chloroform, electrospinning technique was used in this solvent to coat it onto Au-Interdigital electrode (Au-IDE) surface as chemiresistor gas sensor. The nano-composite was characterized by FESEM and FT-IR methods. The electrical resistance was measured using the ammonia (NH3) gas sensing properties of polypyrrole graphene oxide nano-composite (PPy/GO). It was investigated based on the electrical resistance variations upon gas adsorption at different temperature from 30 to 60°C in air and in various NH3 concentrations. The sensitivity and detection limit values for the PPy/GO nano-composite were obtained at 30°C (0.0033, 0.9 ppm), 40°C (0.0146, 1.0 ppm), 50°C (0.011, 0.6 ppm) and 60°C (0.0197, 2.9 ppm), respectively. According to the results the best detection limit was obtained at 50°C temperature.
Keywords:
“conducting polymer”, “grapheme oxide”, “nano-composite”, “gas sensors”
Status : Abstract Accepted (Poster Presentation)