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$Mo0_3/Ti0_2$ and $Bi_2MoO_6$ as ammonia sensors

Raju, AR and Rao, CNR (1994) $Mo0_3/Ti0_2$ and $Bi_2MoO_6$ as ammonia sensors. In: Sensors and Actuators B (Chemical), 21 (1). pp. 23-26.

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Abstract

Ammonia sensors based on catalytic oxides such as $V_2O_5, MoO_3,$ and $\alpha-, \beta-$ and $\gamma$-bismuth molybdates have been investigated. $MoO_3$ (15 mol%) supported on $TiO_2$ and $\gamma-Bi_2MoO_6$ both exhibit satisfactory sensing characteristics for $NH_3$, with a reasonably low working temperature (500-575 K) and a minimum detection limit of 10 ppm. Humidity has no measurable effect on the performance of these materials. FSR studies show the formation of $Mo^{5+}$ species on these oxides on contact with $NH_3$.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Ammonia sensors;Bismuth molybdates;Catalytic oxides;Molybdenum;Titanium;Vanadium
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 18 Oct 2006
Last Modified: 19 Sep 2010 04:31
URI: http://eprints.iisc.ernet.in/id/eprint/8272

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