NO2 detection and redox capacitance reaction of Ag doped SnO2/rGO aerogel at room temperature

2021 ◽  
pp. 161287
Author(s):  
Wenqian Yan ◽  
Kunmeng Zhu ◽  
Yi Cui ◽  
Yanhan Li ◽  
Tao Dai ◽  
...  
Keyword(s):  
Room Temperature ◽  
No2 Detection ◽  
Redox Capacitance

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

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2123 ◽  
Author(s):  
Wenli Li ◽  
Yong Zhang ◽  
Xia Long ◽  
Juexian Cao ◽  
Xin Xin ◽  
...  
Keyword(s):  
Gas Sensors ◽  
High Performance ◽  
Density Functional ◽  
Room Temperature ◽  
Mos2 Nanosheets ◽  
Mechanical Exfoliation ◽  
High Responsivity ◽  
Recovery Behavior ◽  
No2 Gas Sensors ◽  
No2 Detection

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.

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

2021 ◽  
Vol 411 ◽  
pp. 125120
Author(s):  
Yongshan Xu ◽  
Jiayue Xie ◽  
Yunfan Zhang ◽  
FengHui Tian ◽  
Chen Yang ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Room Temperature ◽  
Ws2 Nanosheets ◽  
No2 Detection

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

Sensors ◽  
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%.

2D SnSe2 Nanoflakes Decorated with 1D ZnO Nanowires for ppb-Level NO2 Detection at Room Temperature

2021 ◽  
pp. 128061
Author(s):  
Xuezheng Guo ◽  
Yanqiao Ding ◽  
Xi Yang ◽  
Bingsheng Du ◽  
Chengjiu Zhao ◽  
...  
Keyword(s):  
Room Temperature ◽  
Zno Nanowires ◽  
No2 Detection

Enhanced Performances of PbS Quantum-Dots-Modified MoS2 Composite for NO2 Detection at Room Temperature

2019 ◽  
Vol 11 (9) ◽  
pp. 9438-9447 ◽  
Author(s):  
Xin Xin ◽  
Yong Zhang ◽  
Xiaoxiao Guan ◽  
Juexian Cao ◽  
Wenli Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Pbs Quantum Dots ◽  
No2 Detection

scholarly journals Two-Dimensional NbS2 Gas Sensors for Selective and Reversible NO2 Detection at Room Temperature

ACS Sensors ◽  
2019 ◽  
Vol 4 (9) ◽  
pp. 2395-2402 ◽  
Author(s):  
Yeonhoo Kim ◽  
Ki Chang Kwon ◽  
Sungwoo Kang ◽  
Changyeon Kim ◽  
Tae Hoon Kim ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Two Dimensional ◽  
No2 Detection

Flexible and transparent sensors for ultra-low NO2 detection at room temperature under visible light illumination

2020 ◽  
Vol 8 (29) ◽  
pp. 14482-14490 ◽  
Author(s):  
Xiao-Xue Wang ◽  
Hua-Yao Li ◽  
Xin Guo
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Light Illumination ◽  
Stability Tests ◽  
Visible Light Illumination ◽  
No2 Detection

Flexible and transparent sensors based on parallelly aligned In2O3 nanowires can detect ppb-level NO2 at room temperature under visible light (even under an iPhone screen). The sensing performances are maintained after bending and stability tests.

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