Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 360, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2022.131600
Keywords
Co-MoS 2; 2-D materials; Selectivity; Sensitivity; Response time
Funding
- SRM Institute of Science and Technology
- SEED
- STARTUP grant, and Nano-technology Research Center (NRC)
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In this study, MoS2 and cobalt incorporated MoS2 were demonstrated to enhance the sensing response and rapid recovery for toxic gas detection at room temperature. The Co-incorporated (7 at%) MoS2 showed a 546.6% enhancement in response compared to pristine MoS2 for 100 ppm of NO2 gas. The presence of enhanced edge site in the Co-incorporated samples contributed to excellent gas adsorption and increased response towards NO2 gas molecules. The fabricated device exhibited 70% stability.
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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