Sensing behavior of CdS-TiO thick films for the detection of hydrocarbons.

In this article, the sensing behaviors of undoped titanium dioxide (TiO) and CdS-doped TiO (CdS-TiO) thick films are discussed. Sensing pastes of 2 wt% CdS-TiO and undoped TiO were prepared in the laboratory and used to fabricate thick film gas sensors on an alumina substrate. The crystal structures of TiO and CdS-TiO samples were characterized by XRD and atomic force microscopy (AFM).

Study of the response behavior of a CdS-SnO thick film for high selectivity towards propanol gas.

Gas monitoring devices are in demand for a rapidly growing range of applications. Metal oxide-based gas sensors have been extensively used for the detection of toxic pollutant gases, combustible gases, and hydrocarbon vapors. The sensitivity for a low concentration and observed response and the recovery times of the reported gas sensors are not satisfactory, and it needs further detailed studies.