CARBON NANOTUBE DOPED HYDROXYAPATITE: A STUDY FOR PROPANOL DETECTION.

The study deals with the investigation of Propanol (C3H7OH) sensing at its lower concentration by means of nano ceramic composite. It involves the synthesis of Hydroxyapatite (HAp) and preparation of nano composite material by doping various weight concentrations of carbon nanotubes (CNT) in HAp. Moreover, it also involves characterization of their nanostructure and analysis of their gas sensing behaviour after interacting with organic vapours like Propanol. The surface morphology of the synthesised material and prepared composites is characterised by X-Ray Diffraction (XRD) and Branauer-Emmett-Teller (BET) analysis. The gas sensing parameters such as operating temperature, response / recovery time, and maximum detection limit are studied. The influence of doping material in HAp matrix for propanol sensing is studied. Carbon nanotubes (CNT) doped HAp materials show higher sensitivity than pure HAp, The thick films of 0.2wt% CNT doped HAp gives much efficient sensor substrate for the detection of 100ppm Propanol at a temperature of 600C.