Abstract
Room temperature rapid detection of toxic gases is still ambitious for real-time application. Recently, molybdenum disulfide transition dichalcogenides (MoS2 TMDCs) have been considered as a promising material for gas sensing application, owing to their high surface-to-volume ratio. However low response and incomplete recovery hinder their performance. In this work, we demonstrate MoS2 and cobalt incorporated MoS2 to enhance the sensing response and rapid recovery. Co-incorporated (7 at%) MoS2 showed 546.6% enhancement in response compared to pristine MoS2 for 100 ppm of NO2 gas at room temperature. The enhanced edge site presents in the Co-incorporated samples was the reason for excellent gas adsorption and increased response towards NO2 gas molecules. The stability analysis showed 70% of stability of a fabricated device. These results address a new pathway for an ideal gas sensor for room temperature application.
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