Abstract
In this work a potable, resistive sensor is fabricated for the selective detection of CO gas using nanorods of Ag doped octahedral molecular sieves-2 (Ag-OMS-2). During exposure to carbon monoxide (CO) gas at room temperature, resistance of Ag-OMS-2 film was dropped from 557 kΩ to 352 kΩ in just 18 sec. However, exposed sample regained its initial resistance value in 25 sec when CO gas source was removed. Both sensing and recovery processes were carried out at room temperature. The sensor film showed excellent reproducibility during several cycles of CO gas exposure. Swift activation of oxygen molecules for the oxidation of CO by the silver present in the tunnel of manganese oxide network is supposed to be responsible for sensing activity of Ag-OMS-2 towards carbon monoxide gas.
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