P1.0.11 The sensing behavior of semiconductor metal oxides based on SnO2 thick film for detection of chlorinated VOCs in low concentration

Hamide Mohammad Aliha, Abasali Khodadadi & Yadollah Mortazavi
A SnO2-based semiconductor thick film gas sensor was fabricated for detection of chlorinated VOCs such as dichloromethane (DCM) and trichloroethylene (TCE) at concentrations of 10 and 20 ppm respectively in the temperature range of 100–400°C. Other semiconductors such as ZnO, CuO and Sm2O3 were added in 5.0% wt to SnO2 by co-precipitation method. The samples were characterized by TEM, XRD and BET. Characterization results showed that presence of dopants causes an increase in surface area...