Sensors & Transducers Journal
(ISSN 1726- 5479)
Vol. 85, Issue 11, November 2007, pp.1728-1738
Detection of Hydrogen Sulphide Gas Sensor Based Nanostructured Ba2CrMoO6 Thick Films
A. V. Kadu, N. N. Gedam and G. N. Chaudhari
Nano Technology Research Laboratory, Department of Chemistry
Shri Shivaji Science College
Amravati- 444602, M.S., India
Received: 2 April 2007 /Accepted: 20 November 2007 /Published: 26 November 2007
Abstract: Nanocrystalline pure and doped Ba2CrMoO6, having an average crystallite size of 40 nm were synthesized by the sol-gel citrate method. Structural and gas-sensing characteristics were performed by using X-ray diffraction (XRD) and sensitivity measurements. The gas sensing properties to reducing gases like Hydrogen sulphide (H2S), liquefied petroleum gas (LPG), carbon monoxide (CO) and hydrogen gas (H2) were also discussed. The maximum sensitivity was obtained for 5 wt % Ni doped Ba2CrMoO6 at an operating temperature 250oC for H2S gas. Pd incorporation over 5 wt% Ni doped Ba2CrMoO6 improved the sensitivity, selectivity, response time, and reduced the operating temperature from 250 to 200oC of the sensor for H2S gas. This sensor also shows good satiability.
Keywords: Nanoparticles, Ba2CrMoO6, Sensitivity, Selectivity, Hydrogen sulphide gas sensor
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