Edge-exposed MoS2 nanospheres assembled with SnS2 nanosheet to boost NO2 gas sensing at room temperature

Liu, Lujia; Ikram, Muhammad; Ma, Laifeng; Zhang, Xueyi; He, Ling; Ullah, Mohib; Khan, Mawaz; Yu, Haitao; Shi, Keying

doi:10.1016/j.jhazmat.2020.122325

Cited by 96 publications

(61 citation statements)

References 72 publications

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“…The same phenomena have also been reported from other 2D material‐based gas sensors. [ 26 , 33 ] Moreover, the sensor shows an outstanding selectivity toward NO 2 among other interfering gases including NH 3 , methanol, ethanol, and acetone as shown in Figure 3f .…”

Section: Resultsmentioning

confidence: 99%

A Photovoltaic Self‐Powered Gas Sensor Based on All‐Dry Transferred MoS₂/GaSe Heterojunction for ppb‐Level NO₂ Sensing at Room Temperature

et al. 2021

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Traditional gas sensors are facing the challenge of low power consumption for future application in smart phones and wireless sensor platforms. To solve this problem, self-powered gas sensors are rapidly developed in recent years. However, all reported self-powered gas sensors are suffering from high limit of detection (LOD) toward NO 2 gas. In this work, a photovoltaic self-powered NO 2 gas sensor based on n-MoS 2 /p-GaSe heterojunction is successfully prepared by mechanical exfoliation and all-dry transfer method. Under 405 nm visible light illumination, the fabricated photovoltaic self-powered gas sensors show a significant response toward ppb-level NO 2 with short response and recovery time and high selectivity at room temperature (25°C). It is worth mentioning that the LOD toward NO 2 of this device is 20 ppb, which is the lowest of the reported self-powered room-temperature gas sensors so far. The discussed devices can be used as building blocks to fabricate more functional Internet of things devices.

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Section: Resultsmentioning

confidence: 99%

A Photovoltaic Self‐Powered Gas Sensor Based on All‐Dry Transferred MoS₂/GaSe Heterojunction for ppb‐Level NO₂ Sensing at Room Temperature

et al. 2021

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“…Having many resemblances in term of crystal structures, combining MoS 2 with other TMDs families provide more synergistic process and component suitability, which often increases the gas sensor ability. An assemble heterostructure containing MoS 2 and SnS 2 composite has been successfully fabricated by Liu et al [236] using a hydrothermal approach. The MoS 2 /SnS 2 composite exhibited an outstanding improvement for NO 2 gas detection compared to MoS 2 and SnS 2 .…”

Section: Heterostructures Couplingmentioning

confidence: 99%

“…Simultaneously, the holes from MoS sensor is exposed to NO 2 gas, the molecules are adsorbed on the surface of the sensor and capture free electrons from the accepter level of the sensor to form NO 2 − . Also, the NO 2 molecules reacted with chemisorbed oxygen and consequently converted into NO 3 , disturbing the electric field's equilibrium to decrease the barrier width and increase the sensor conductivity toward NO 2 gas [236]. The entire process is simplified in Fig.…”

Section: Heterostructures Couplingmentioning

confidence: 99%

Advanced Strategies to Improve Performances of Molybdenum-Based Gas Sensors

et al. 2021

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Molybdenum-based materials have been intensively investigated for high-performance gas sensor applications. Particularly, molybdenum oxides and dichalcogenides nanostructures have been widely examined due to their tunable structural and physicochemical properties that meet sensor requirements. These materials have good durability, are naturally abundant, low cost, and have facile preparation, allowing scalable fabrication to fulfill the growing demand of susceptible sensor devices. Significant advances have been made in recent decades to design and fabricate various molybdenum oxides- and dichalcogenides-based sensing materials, though it is still challenging to achieve high performances. Therefore, many experimental and theoretical investigations have been devoted to exploring suitable approaches which can significantly enhance their gas sensing properties. This review comprehensively examines recent advanced strategies to improve the nanostructured molybdenum-based material performance for detecting harmful pollutants, dangerous gases, or even exhaled breath monitoring. The summary and future challenges to advance their gas sensing performances will also be presented.

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“…For gas sensing TMDC-material in the device, the most common working principle is for adsorption of gas particles towards the TMDCs for a charge transfer, giving a change of resistivity in material, then desorption from the TMDCs [113]. In this field, researchers are constantly searching for TMDC materials that can provide a very low limit of detection (LOD), high sensitivity, short response and recovery time [114][115][116].…”

Section: Gas Sensing For Pollution Reductionmentioning

confidence: 99%

“…The technique resulted in low LOD (25 ppb) in room temperature conditions with high sensitivity. Moreover, Liu et al [114] synthesized a flower-like porous SnS 2 NSs with edge exposed MoS 2 nanosphere, which resulted in a very fast response time of 2 seconds. Group-10 noble TMDCs such as PtSe 2 has also received much research attention due to their widely tunable bandgap and excellent performance in gas sensing [124].…”

Section: No X Detectionmentioning

confidence: 99%

Transition Metal Dichalcogenides for the Application of Pollution Reduction: A Review

et al. 2020

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The material characteristics and properties of transition metal dichalcogenide (TMDCs) have gained research interest in various fields, such as electronics, catalytic, and energy storage. In particular, many researchers have been focusing on the applications of TMDCs in dealing with environmental pollution. TMDCs provide a unique opportunity to develop higher-value applications related to environmental matters. This work highlights the applications of TMDCs contributing to pollution reduction in (i) gas sensing technology, (ii) gas adsorption and removal, (iii) wastewater treatment, (iv) fuel cleaning, and (v) carbon dioxide valorization and conversion. Overall, the applications of TMDCs have successfully demonstrated the advantages of contributing to environmental conversation due to their special properties. The challenges and bottlenecks of implementing TMDCs in the actual industry are also highlighted. More efforts need to be devoted to overcoming the hurdles to maximize the potential of TMDCs implementation in the industry.

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Edge-exposed MoS2 nanospheres assembled with SnS2 nanosheet to boost NO2 gas sensing at room temperature

Cited by 96 publications

References 72 publications

A Photovoltaic Self‐Powered Gas Sensor Based on All‐Dry Transferred MoS₂/GaSe Heterojunction for ppb‐Level NO₂ Sensing at Room Temperature

A Photovoltaic Self‐Powered Gas Sensor Based on All‐Dry Transferred MoS₂/GaSe Heterojunction for ppb‐Level NO₂ Sensing at Room Temperature

Advanced Strategies to Improve Performances of Molybdenum-Based Gas Sensors

Transition Metal Dichalcogenides for the Application of Pollution Reduction: A Review

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Edge-exposed MoS2 nanospheres assembled with SnS2 nanosheet to boost NO2 gas sensing at room temperature

Cited by 96 publications

References 72 publications

A Photovoltaic Self‐Powered Gas Sensor Based on All‐Dry Transferred MoS2/GaSe Heterojunction for ppb‐Level NO2 Sensing at Room Temperature

A Photovoltaic Self‐Powered Gas Sensor Based on All‐Dry Transferred MoS2/GaSe Heterojunction for ppb‐Level NO2 Sensing at Room Temperature

Advanced Strategies to Improve Performances of Molybdenum-Based Gas Sensors

Transition Metal Dichalcogenides for the Application of Pollution Reduction: A Review

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A Photovoltaic Self‐Powered Gas Sensor Based on All‐Dry Transferred MoS₂/GaSe Heterojunction for ppb‐Level NO₂ Sensing at Room Temperature

A Photovoltaic Self‐Powered Gas Sensor Based on All‐Dry Transferred MoS₂/GaSe Heterojunction for ppb‐Level NO₂ Sensing at Room Temperature