Detection of propanol gas using titanium dioxide based thick film

Cadmium Sulphide (CdS) doped Titanium dioxide (TiO2) thick film sensor was produced on alumina substrate and their propanol sensing behaviour were investigated. Undoped TiO2 and 2wt% CdS-TiO2 thick film are fabricated on alumina substrate. Sensing properties such as, sensitivity and selectivity measurement are carried out in the range 0-5000 ppm at room temperature. The results showed that, 2wt% CdS-TiO2 sample gives higher response (60%) for propanol against L.P.G. and ethanol. The response of propanol is 3.75 times more than L.P.G. and 1.94 time of Ethanol. 2wt% CdS-TiO2 sample are more (56.08 %) selective for propanol over L.P.G. and Ethanol. The result obtained indicated that CdS-TiO2 composite thick film may used for propanol sensing.