Indian Journal of Pure and Applied Physics

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Room Temperature Ammonia Sensing of MoS2 2D Sheets Decorated with Polyaniline (PANI)


Affiliations
1 Department of Physics, Gauhati University, Guwahati 781 014, Assam, India
2 Department of Physics, Sipajhar College, Sipajhar 784 145, Assam, India
 

In the present work, a selective room temperature (RT) operable ammonia (NH3) sensor based on molybdenum disulphide (MoS2) nanosheet decorated with polyaniline (PANI) (MoS2-PANI) is successfully developed. The sensor material is prepared by simple chemical in-situ polymerisation of aniline. Prior to the gas sensing studies, morphological, thermal and compositional studies are carried out. These studies reveal good incorporation of PANI into MoS2 nanosheets. The gas sensing property of MoS2-PANI sensors is studied and compared with the sensor based on bare MoS2 and bare PANI. The bare PANI shows opposite gas sensing properties compared to the bare MoS2. However, the sensing nature of PANI is followed in the composite, but with better sensing and stability. The sensing behaviour is observed to be excellent in terms of stability, selectivity, sensitivity, response and recovery over the pure MoS2 sensor.

Keywords

Molybdenum Disulphide, Polyaniline, Composites, Ammonia Sensing, Selectivity, Repeatability.
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  • Room Temperature Ammonia Sensing of MoS2 2D Sheets Decorated with Polyaniline (PANI)

Abstract Views: 97  |  PDF Views: 52

Authors

Ali Akbar
Department of Physics, Gauhati University, Guwahati 781 014, Assam, India
Mausumi Das
Department of Physics, Sipajhar College, Sipajhar 784 145, Assam, India
D. Sarkar
Department of Physics, Gauhati University, Guwahati 781 014, Assam, India

Abstract


In the present work, a selective room temperature (RT) operable ammonia (NH3) sensor based on molybdenum disulphide (MoS2) nanosheet decorated with polyaniline (PANI) (MoS2-PANI) is successfully developed. The sensor material is prepared by simple chemical in-situ polymerisation of aniline. Prior to the gas sensing studies, morphological, thermal and compositional studies are carried out. These studies reveal good incorporation of PANI into MoS2 nanosheets. The gas sensing property of MoS2-PANI sensors is studied and compared with the sensor based on bare MoS2 and bare PANI. The bare PANI shows opposite gas sensing properties compared to the bare MoS2. However, the sensing nature of PANI is followed in the composite, but with better sensing and stability. The sensing behaviour is observed to be excellent in terms of stability, selectivity, sensitivity, response and recovery over the pure MoS2 sensor.

Keywords


Molybdenum Disulphide, Polyaniline, Composites, Ammonia Sensing, Selectivity, Repeatability.

References