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Dispersed SnO2 nanoparticles on MoS2 nanosheets for superior gas-sensing performances to ethanol

机译:MoS2纳米片上的分散SnO2纳米颗粒具有优于乙醇的气敏性能

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摘要

The unique properties of MoS2 nanosheets make them a promising supporting substrate for preventing the interparticle aggregation of metal-oxide-semiconductor nanomaterials. Novel composites were successfully obtained by a two-step low temperature hydrothermal method for the synthesis of SnO2 nanoparticles dispersing on the surfaces of MoS2 nanosheets. The morphology and structure of the as-prepared samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). Owing to the supporting substrate of specific two-dimensional MoS2 nanosheets and the superior gas-sensing performance offered by ultrasmall SnO2 nanoparticles, the sensor based on SnO2@MoS2 composites exhibits high response and good selectivity to ethanol gas.
机译:MoS2纳米片的独特性能使其成为防止金属氧化物半导体纳米材料颗粒间聚集的有前途的支撑基材。通过两步低温水热方法成功地获得了新型复合材料,用于合成分散在MoS2纳米片表面的SnO2纳米粒子。通过X射线衍射(XRD),X射线光电子能谱(XPS),场发射扫描电子显微镜(FESEM)和透射电子显微镜(TEM)来表征所制备样品的形态和结构。由于特定的二维MoS2纳米片的支撑基底以及超小SnO2纳米粒子提供的优越的气体传感性能,基于SnO2 @ MoS2复合材料的传感器显示出高响应性和对乙醇气体的良好选择性。

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