24 / 25
Page 68
Mater Sci Nanotechnol 2017 | Volume 1 Issue 2
allied
academies
Nanomaterials and Nanochemistry
November 29-30, 2017 | Atlanta, USA
International Conference on
S
emiconductor oxides are a very important class of
materials because they possess excellent properties and
have seen wide application in various areas of science and
technology like solar energy conversion, photo catalysis, gas
sensors, and optoelectronics. They have been extensively
studied from both experimental and theoretical points of
view. Comparedwith their bulk counterparts, nanostructured
semiconductor oxides retain rich morphologies and unusual
physical and chemical properties, due to which they have
wide potential applications in nanoscale devices. Tin oxide
(SnO
2
) has been widely studied as an n-type semiconductor;
it has a band gap energy of 3.6 eV at room temperature
and has been used as a promising material for gas sensors
and optoelectronic devices, and as a negative electrode for
lithium batteries. Therefore in the present research Tin oxide
(SnO
2
) nanoparticles have been synthesized by solution
combustion synthesis, hydroxide method and hydrothermal
route and the effect of different nanostructures and sizes
on gas sensing behavior has been studied for toluene gas.
Most of the VOCs are hazardous and are known to cause
several kinds of diseases like allergies, asthma, cancer
and emphysema. Toluene is one of the VOCs. Obtained
ultrafine nanoparticles have BET surface area ~41 m
2
/gm.
Synthesized particles have particle size in the range of 8-20
nm. The degree of agglomeration of SnO
2
nanoparticles is
calculated. The nitrogen adsorption-desorption isotherms of
the nanoparticles were recorded at 77K.
e:
chavan_au@yahoo.co.inStudies on different SnO
2
nanostructures for VOC gas sensing
A U Chavan
D Y Patil College of Engineering, India