首页|MoO2/MoO3/MXene ternary nanocomposites for high-performance ethanol detection at room temperature
MoO2/MoO3/MXene ternary nanocomposites for high-performance ethanol detection at room temperature
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NSTL
Elsevier
? 2022 Elsevier B.V.Ethanol, as one of the common volatile organic compounds (VOCs), has serious harm to the human central nervous system. The high-efficiency detection of ethanol gas at room temperature (RT) has attracted widespread attention in the field of current gas-sensing detection. Here, we designed and prepared ternary nanocomposites constructed with two-dimensional MXene and MoO2/MoO3 nanosheets, which can be used in the field of low-concentration ethanol detection at RT. The MoO2/MoO3/MXene nanocomposites make full use of the excellent electrical conductivity and large specific surface area of MXene, which provides more active adsorption sites and reaction centers. Moreover, the construction of n-n heterojunctions between uniformly grown MoO2 and MoO3 nanosheets significantly enhances the response of the sensor. The gas sensing results revealed that MoO2/MoO3/MXene nanocomposites showed high response (Ra/Rg = 19.77 @200 ppm) to ethanol at RT, with a detection limit of 5 ppm (Ra/Rg = 2.07). At the same time, the sensor also has excellent selectivity and fast response-recovery to ethanol (46 s/276 s). Further, the possible gas sensing mechanism of the composites was proposed and discussed. This work suggests the promising applications of metal oxides heterojunctions/2D hybrid materials for VOCs gas sensing detection at RT.
EthanolGas sensorMoO2/MoO3 nanosheetsMXeneRoom temperature
Zhang S.、Song P.、Wang Q.、Ding Y.、Zheng Y.
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School of Material Science and Engineering University of Jinan
School of Transportation Civil Engineering Shandong Jiaotong University
NSTL
Elsevier
