Development of poly(3-thiopheneacetic acid)/zeolite Y as gas sensor material for ammonia

Abstract

Poly (3-thiopheneacetic acid) was synthesized and doped from an insulating state to a conducting state using perchloric acid. The electrical conductivity sensitivity towards ammonia is further improved by introducing Y zeolite into the doped Poly (3-thiopheneacetic acid) matrix. For the effect of zeolite content, the composite with 10% v/v of Y zeolite has the highest electrical conductivity sensitivity (σ/σN₂ ) values when exposed to NH₃. For the effect of Si/Al ratio, The electrical conductivity sensitivity (σ/σN₂ ) increases with increasing Si/Al ratio. The highest electrical conductivity sensitivity of all composites is received with the doped Pth / Zeolite Y (Si/Al = 80) at the value of 7.46 ± 3.56 x10².