Effect of Substrate Temperature on Porosity and Gas Sensing Properties of SnO₂-B: Doped Polypyrrole Thin Films

Abstract

Porous SnO2-B: doped polypyrrole thin films were synthesized by the dissolving 0.15M of stannous chloride (SnCl4.5H2O) (10%, 20%, 30%, 40%, and 50%) in 25ml of ethanol and adding 4% of Boric acid (H3BO3) and polypyrrole (1:1) using chemical spray pyrolysis technique. Studies on effect of substrate temperature on porosity of the deposited films were at four different temperatures ranging 200⁰C to 280⁰C. The H2S gas was used to study the gas sensing behavior of deposited films and all films were characterized by using IR, XRD, SEM, UV-Vis spectrometry, and current-voltage measurement.