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Transition Metal Exchanged Zeolite Layers for Selectivity Enhancement of Metal-Oxide Semiconductor Gas Sensors

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5 Author(s)

A novel method of improving the selectivity of metal oxide gas sensors has been developed by using catalytically active molecular sieve materials. They have been successfully introduced into a proprietary sensor array. The cracking patterns of linear alkanes over transition metal exchanged zeolite Y have been measured using a zeolite bed/GC/MS experimental set-up within a temperature range of 300degC to 400degC. Studies have been carried out regarding the effects of metal loading, zeolite type, material fabrication techniques, and operating temperature in relation to catalytic activity and selectivity. The composite sensors utilising the novel zeolite materials have been used in a custom built sensor rig that houses three dual electrode sensors and can measure real-time responses of these sensors to an introduced headspace generated from organic liquids

Published in:

Sensors Journal, IEEE  (Volume:7 ,  Issue: 4 )

Date of Publication:

April 2007

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