Investigating NO2 gas sensing behavior of flower-like MoS2 and rGO based nano-composite

Kanaujiya, Neha; Anupam,; Golimar, Kapil; Pandey, Prateek Chandra; Kumari, Jyoti; Varma, G. D.

doi:10.1063/1.5032477

Cited by 10 publications

(5 citation statements)

References 6 publications

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“…After removing the NO 2 from the gas sensor, the resistance of the gas sensor can return completely each time with almost no drift. The recovery behavior is very fast and recovery time constants are as short as 2–4 s. As the MoS 2 gas sensors reported in the previous works often fail to recover [28,29,30], the degree of recovery is an important indicator of the quality of the gas sensor. Herein, the recovery characteristic of the MoS 2 gas sensor is investigated by calculating the recovery rate, defined as follows [31,32].…”

Section: Resultsmentioning

confidence: 99%

Gas Sensors Based on Mechanically Exfoliated MoS2 Nanosheets for Room-Temperature NO2 Detection

Zhang

Long

et al. 2019

Sensors

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The unique properties of MoS2 nanosheets make them a promising candidate for high-performance room temperature gas detection. Herein, few-layer MoS2 nanosheets (FLMN) prepared via mechanical exfoliation are coated on a substrate with interdigital electrodes for room-temperature NO2 detection. Interestingly, compared with other NO2 gas sensors based on MoS2, FLMN gas sensors exhibit high responsivity for room-temperature NO2 detection, and NO2 is easily desorbed from the sensor surface with an ultrafast recovery behavior, with recovery times around 2 s. The high responsivity is related to the fact that the adsorbed NO2 can affect the electron states within the entire material, which is attributed to the very small thickness of the MoS2 nanosheets. First-principles calculations were carried out based on the density functional theory (DFT) to verify that the ultrafast recovery behavior arises from the weak van der Waals binding between NO2 and the MoS2 surface. Our work suggests that FLMN prepared via mechanical exfoliation have a great potential for fabricating high-performance NO2 gas sensors.

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Section: Resultsmentioning

confidence: 99%

Gas Sensors Based on Mechanically Exfoliated MoS2 Nanosheets for Room-Temperature NO2 Detection

Zhang

Long

et al. 2019

Sensors

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“…Among these harmful gases, NO 2 and NH 3 will not only do harm to the environment, but also harm people's health, such as damaging the ozone layer, causing acid rain, causing pulmonary edema, etc. Neha kanaujiya, et al [18] synthesized petal like MoS 2 by hydrothermal method, and then prepared MoS 2 composite graphene materials. The research group explored the sensing properties of pure MoS 2 and its composite rGO materials at different temperatures and concentrations of NO 2 .…”

Section: Application Of Materials In Gas Sensorsmentioning

confidence: 99%

“…gas at room temperature. [18] H 2 is a kind of flammable and explosive gas, and serious casualties caused by H 2 explosion also occur from time to time. A Venkatesan et al [19] reported the sensing of H 2 by MoS 2 /rGO materials.…”

Section: Application Of Materials In Gas Sensorsmentioning

confidence: 99%

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Research Progress of MoS₂Composite rGO Material in Gas Sensor

Jiang¹,

Wang²,

Tao³

2021

E3S Web Conf.

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Since the successful preparation of single-layer graphene in 2004, two-dimensional materials have gradually become one of the research hotspots in the field of materials science. However, due to the inevitable defects of intrinsic two-dimensional materials, researchers began to explore how to obtain more excellent two-dimensional materials. In this paper, the basic properties, preparation methods and application in gas sensors of MoS2/rGO composites are reviewed. This paper has a certain reference value for the research of two-dimensional materials used in gas sensors.

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“…Also, it has stable crystalline structure, size dependent bandgap and found in either semiconductor or metallic nature. It is widely reported in various applications ranging from sensors, transistors, and solar cells to optical fiber lasers and photodetectors [1][2][3][4][5][6][7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Near Infrared Molybdenum Disulfide/Silicon Heterojunction Photodetector by Drop Casting Method

Rashid¹,

Arsad²,

Ahmad³

et al. 2021

Preprint

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In this work, a highly efficient, molybdenum disulfide (MoS2) based near infrared (NIR) heterojunction photodetector is fabricated on a Si substrate using a cost-effective and simple drop casting method. A non-stoichiometric and inhomogeneous MoS2 layer with a S/Mo ratio of 2.02 is detected using energy dispersive X-ray spectroscopy and field emission scanning electron microscope analysis. Raman shifts are noticed at 382.42 cm-1 and 407.97 cm-1, validating MoS2 thin film growth with a direct bandgap of 2.01 eV. The fabricated n-MoS2/p-Si photodetector is illuminated with a 785 nm laser at different intensities, and demonstrate the ability of the photodetector to work in both regions, the forward biased and reverse biased from above 1.5 V and less than -1.0 V. The highest responsivity, R is calculated to be 0.52 A/W while the detectivity D* is 4.08 x 10^10 Jones for an incident light intensity of 9.57 mW/cm2. The minimum rise and fall times are calculated as 1.77 ms and 1.31 ms for an incident laser power of 9.57 mW/cm^2 and 6.99 mW/cm^2 respectively at a direct current bias voltage of 10 V. The demonstrated results are promising for the low-cost fabrication of a thin MoS2 film for photonics and optoelectronic device applications.

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Investigating NO2 gas sensing behavior of flower-like MoS2 and rGO based nano-composite

Cited by 10 publications

References 6 publications

Gas Sensors Based on Mechanically Exfoliated MoS2 Nanosheets for Room-Temperature NO2 Detection

Gas Sensors Based on Mechanically Exfoliated MoS2 Nanosheets for Room-Temperature NO2 Detection

Research Progress of MoS₂Composite rGO Material in Gas Sensor

Fabrication and Characterization of Near Infrared Molybdenum Disulfide/Silicon Heterojunction Photodetector by Drop Casting Method

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Investigating NO2 gas sensing behavior of flower-like MoS2 and rGO based nano-composite

Cited by 10 publications

References 6 publications

Gas Sensors Based on Mechanically Exfoliated MoS2 Nanosheets for Room-Temperature NO2 Detection

Gas Sensors Based on Mechanically Exfoliated MoS2 Nanosheets for Room-Temperature NO2 Detection

Research Progress of MoS2Composite rGO Material in Gas Sensor

Fabrication and Characterization of Near Infrared Molybdenum Disulfide/Silicon Heterojunction Photodetector by Drop Casting Method

Contact Info

Product

Resources

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Research Progress of MoS₂Composite rGO Material in Gas Sensor