Edge-enriched WS2 nanosheets on carbon nanofibers boosts NO2 detection at room temperature

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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A flexible S1−xSex@porous carbon nanofibers (x≤0.1) thin film with high performance for Li-S batteries and room-temperature Na-S batteries

Energy Storage Materials ◽

10.1016/j.ensm.2016.05.011 ◽

2016 ◽

Vol 5 ◽

pp. 50-57 ◽

Cited By ~ 45

Author(s):

Linchao Zeng ◽

Yu Yao ◽

Jinan Shi ◽

Yu Jiang ◽

Weihan Li ◽

...

Keyword(s):

Thin Film ◽

Carbon Nanofibers ◽

Porous Carbon ◽

High Performance ◽

Room Temperature

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3D hybrid Ni-Multiwall carbon nanotubes/carbon nanofibers for detecting sarin nerve agent at room temperature

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2018.11.317 ◽

2019 ◽

Vol 780 ◽

pp. 680-689 ◽

Cited By ~ 12

Author(s):

Khaled Tawfik Alali ◽

Jingyuan Liu ◽

Kassem Aljebawi ◽

Qi Liu ◽

Rongrong Chen ◽

...

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanofibers ◽

Room Temperature ◽

Multiwall Carbon Nanotubes ◽

Nerve Agent ◽

Multiwall Carbon

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Effect of GNWs/NiO-WO3/GNWs Heterostructure for NO2 Gas Sensing at Room Temperature

Sensors ◽

10.3390/s22020626 ◽

2022 ◽

Vol 22 (2) ◽

pp. 626

Author(s):

Seokhun Kwon ◽

Seokwon Lee ◽

Joouk Kim ◽

Chulmin Park ◽

Hosung Jung ◽

...

Keyword(s):

Particulate Matter ◽

Room Temperature ◽

Microwave Plasma ◽

Gas Sensing ◽

Chemical Vapor ◽

Gas Concentration ◽

Negative Change ◽

Low Concentrations ◽

Detection Characteristics ◽

No2 Detection

Recently, as air pollution and particulate matter worsen, the importance of a platform that can monitor the air environment is emerging. Especially, among air pollutants, nitrogen dioxide (NO2) is a toxic gas that can not only generate secondary particulate matter, but can also derive numerous toxic gases. To detect such NO2 gas at low concentration, we fabricated a GNWs/NiO-WO3/GNWs heterostructure-based gas sensor using microwave plasma-enhanced chemical vapor deposition (MPECVD) and sputter, and we confirmed the NO2 detection characteristics between 10 and 50 ppm at room temperature. The morphology and carbon lattice characteristics of the sensing layer were investigated using field emission scanning electron microscopy (FESEM) and Raman spectroscopy. In the gas detection measurement, the resistance negative change according to the NO2 gas concentration was recorded. Moreover, it reacted even at low concentrations such as 5–7 ppm, and showed excellent recovery characteristics of more than 98%. Furthermore, it also showed a change in which the reactivity decreased with respect to humidity of 33% and 66%.

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Carbon Nanofibers from Carbon Nanotubes by 1.2 keVAr+Sputtering at Room Temperature

Journal of Nanomaterials ◽

10.1155/2014/313095 ◽

2014 ◽

Vol 2014 ◽

pp. 1-5 ◽

Cited By ~ 4

Author(s):

Shuang-Xi Xue ◽

Qin-Tao Li ◽

Xian-Rui Zhao ◽

Qin-Yi Shi ◽

Zhi-Gang Li ◽

...

Keyword(s):

Electron Microscopy ◽

Carbon Nanotubes ◽

Carbon Nanofibers ◽

Carbon Nanoparticles ◽

Room Temperature ◽

Ion Irradiation ◽

Transmission Electron ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes ◽

Carbon Nanowires

Multi-walled carbon nanotubes (MWCNTs) were irradiated by 1.2 keV Ar ion beams for 15–60 min at room temperature with current density of 60 µA/cm2. The morphology and microstructure are investigated by scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. The results show that carbon nanofibers are achieved after 60 min ion irradiation and the formation of carbon nanofibers proceeds through four periods, carbon nanotubes—amorphous carbon nanowires—carbon nanoparticles along the tube axis—conical protrusions on the nanoparticles surface—carbon nanofibers from the conical protrusions.

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