GAS SENSING PROPERTIES OF Zn–DOPED TIN OXIDE NANOPARTICLES WITH METHANOL

Dr. Mahendra Kumar

Volume : V, Issue : X, October - 2015

GAS SENSING PROPERTIES OF Zn–DOPED TIN OXIDE NANOPARTICLES WITH METHANOL

Dr. Mahendra Kumar

Abstract :

 Tin oxide, an n–type wide direct band gap semiconductor is promisingly used material for detection of wide variety of gases such as LPG, NO2 , CO, H2 S and volatile organic compound (VOC’S) and many different applications such as high–performance capacitive behaviour, transparent conducting electrodes, transistors, lightemitting diodes (LEDs) and solar cells. The electrical conductivity of the SnO2 nanoparticles are dependent on the density of preadsorbed oxygen ions on its surface. The detection mechanism of gas is based on the reversible change of conductivity of the surface of metal oxide semiconductors particles/grains induced by gas–solid interaction. Several strategies have been adopted to enhance the performance of SnO2 gas sensors; including doping with aliovalent ions (e.g. Cu, Zn, In), catalytically active additives.