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Vol. 98, Issue 11, November 2008, pp.6-15

 

 

Bullet

 

Synthesis of Nanocrystalline SnO2 Modified TiO2:a Material for Carbon Monoxide Gas Sensor

A. B. BODADE, M. ALVI, A. V.KADU, S. V.JAGTAP,
S. K. RITHE, P. R. PADOLE and *G. N. CHAUDHARI
Nano Technology Research Laboratory, Department of Chemistry,
Shri Shivaji Science College, Amravati, M.S.- 444602, India
E-mail: gnc4@indiatimes.com, nano@rediffmail.com
 
 
Received: 16 October 2008   /Accepted: 17 November 2008   /Published: 30 November 2008

 

Abstract: Nanocrystalline SnO2 doped TiO2 having average crystallite size of 45-50 nm were synthesized by the sol-gel method and studied for gas sensing behavior to reducing gases like CO, liquefied petroleum gas (LPG), NH3 and H2. The material characterization was done by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM). The sensitivity measurements were carried out as a function of different operating temperature in SnO2 doped TiO2. The 15 wt.% SnO2 doped TiO2 based CO sensor shows better sensitivity at an operating temperature 240C Incorporation of 0.5 wt% Pd improved the sensitivity, selectivity, response time and reduced the operating temperature from 240C to 200C for CO sensor.

 

Keywords: TiO2, SnO2, CO sensor, Selectivity, Response time

 

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