首页|(162812)Sensing performance of α-Fe_2O_3/Ti_3C_2T_x MXene nanocomposites to NH_3 at room temperature
(162812)Sensing performance of α-Fe_2O_3/Ti_3C_2T_x MXene nanocomposites to NH_3 at room temperature
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NSTL
Elsevier
Room temperature (RT) gas sensors play a crucial role in the development of wearable and portable devices. Herein, a single hydrothermal approach was used to effectively rivet the α-Fe_2O_3 to the functionalized Ti_3C_2T_x MXene plates to prepare the α-Fe_2O_3/Ti_3C_2T_x MXene composites material with high specific surface area (29.2 m~2/g) and abundant functional groups, forming a hybrid heterojunction structure. A side-heated sensor was manufactured and its sensing performance for a variety of vapors were measured experimentally. The morphology and crystal phase of the composite products were analyzed through a range of testing technique. The rose-like α-Fe_2O_3/Ti_3C_2T_x MXene sensor revealed a response value and rapid response/recovery times of 18.3% and below 2.5 s for 5 ppm NH_3 gas at RT under relatively humidity (RH) of 22%. Meanwhile, it illustrated an excellent linear response in the vary of 5-100 ppm, excellent reversibility and the long-term stability. In addition, a plausible mechanism of the α-Fe_2O_3/Ti_3C_2T_x MXene sensor was predicted, and the adsorption capacity of composites material was confirmed by the support of density functional theory (DFT) calculations. This work is expected to provide a fresh idea for the design of other high properties RT gas sensors in the future.
Gas sensorsα-Fe_2O_3Ti_3C_2T_x MXeneNH_3Room temperature
Miao Liu、Jun Ji、Peng Song
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School of Material Science and Engineering, University of Jinan, Jinan 250022, China
NSTL
Elsevier
