Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 378, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2022.133216
Keywords
Ti 3 C 2 T x MXene; Ethanol; Gas sensor; DFT
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MoO3/Ti3C2Tx MXene nanocomposites were successfully prepared by a simple hydrothermal synthesis method, achieving effective monitoring of low-concentration ethanol gas (1.61@1 ppm). The MoO3/Ti3C2Tx MXene nanocomposites have a doubled specific surface area (61.044 m2/g) compared to Ti3C2Tx MXene (33.385 m2/g), providing more reaction centers and active sites for ethanol molecules. The gas-sensing results showed outstanding selectivity, reproducibility, and fast response-recovery (10/49 s). The possible sensing mechanism of the composite was discussed in detail with density functional theory (DFT). This work provides a new sensing design strategy for detecting VOCs at low-temperature.
Ethanol, as one of the most widely used volatile organic compounds (VOCs), can cause serious harm to the human respiratory system when exposed to low concentrations of ethanol gas for a long time. Here, we successfully prepared MoO3/Ti3C2Tx MXene nanocomposites by a simple hydrothermal synthesis method, realizing the effective monitoring of low-concentration ethanol gas (1.61@1 ppm). The specific surface area of MoO3/ Ti3C2Tx MXene nanocomposites (61.044 m2/g) is doubled compared with Ti3C2Tx MXene (33.385 m2/g), which provides more reaction centers and active sites for ethanol molecules. Meanwhile, the gas-sensing results revealed that MoO3/Ti3C2Tx MXene nanocomposites show outstanding selectivity and reproducibility, as well as fast response-recovery (10/49 s). Subsequently, the possible sensing mechanism of the composite was further discussed in detail in combination with density functional theory (DFT). This work provides a new sensing design strategy for detecting VOCs at low-temperature.
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