Hydrothermal Fabrication of Ag-Decorated MoSe2/Reduced Graphene Oxide Ternary Hybrid for H2S Gas Sensing
Hydrothermal Fabrication of Ag-Decorated MoSe2/Reduced Graphene Oxide Ternary Hybrid for H2S Gas Sensing
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DOI：
10.1109/jsen.2020.3006983
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发表时间：
2020-11-15
影响因子：
4.3
通讯作者：
Fan, Xin
中科院分区：
文献类型：
--
作者：
Luo, Yuwei;Zhang, Dongzhi;Fan, Xin
采用水热法制备了Ag-MoSe 2/还原氧化石墨烯（rGO）三元复合材料，研究了其对H2 S气体的敏感性。采用X射线衍射（XRD）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和能谱仪（EDS）对Ag-MoSe 2/rGO纳米复合材料的微观结构、形貌和组成特征进行了全面的测试。通过在室温下暴露于0.1 ~ 30 ppm的不同浓度的H2S气体中，研究了Ag-MoSe_2/rGO气敏元件的气敏性能。实验结果表明，该传感器对H-2S气体具有较高的响应速度、良好的响应恢复性能、良好的选择性和重现性。此外，还研究了Ag负载量对H2S气敏性能的影响. Ag-MoSe 2/rGO薄膜传感器的传感机理可归结为电子转移对势垒的调制和三元化合物纳米结构的协同效应。在不同的应用中，所制备的Ag-MoSe 2/rGO复合材料是室温下检测H2S气体的潜在候选材料。
This paper demonstrates a H-2 S gas sensor based on Ag-MoSe2/reduced graphene oxide (rGO) ternary composite material via hydrothermal method was studied. The microstructures, morphologies and compositional characteristics of the Ag-MoSe2/rGO nanocomposite were completely tested by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscope (TEM) and energy dispersive spectrometer (EDS). By exposing it to various concentrations of H-2 S gas from 0.1 ppm to 30 ppm at room temperature, the gas sensing properties of the Ag-MoSe2/rGO sensor were examined. The experimental data indicated that the H-2 S gas sensor has a high response, quite response-recovery performances, excellent selectivity and reproducibility toward H-2 S gas. Moreover, the work also investigates the effect of Ag loading in the compound on the H-2 S gas sensing. The sensing mechanism of the Ag-MoSe2/rGO film sensor can be attributed to the modulation of potential barrier with electron transfer and the synergistic effect of the ternary compound nanostructures. This paper shows that in diverse applications, the prepared Ag-MoSe2/rGO composite is a potential candidate for detecting H-2 S gas at room temperature.