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首页> 外文期刊>International Journal of Electrochemical Science >Morphological and Optical Properties of SnO2 Doped ZnO Nanocomposites for Electrochemical Sensing of Hydrazine
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Morphological and Optical Properties of SnO2 Doped ZnO Nanocomposites for Electrochemical Sensing of Hydrazine

机译：SnO 2 掺杂的ZnO纳米复合材料的形貌和光学性质对肼的电化学传感

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摘要

SnO2/ZnO nanomaterials were synthesized by sol-gel method using polyethylene glycol with differentSnO2 contents. The synthesized samples were annealed at 600 oC. The effects of SnO2/ZnO wereinvestigated Viz., molar ratios, morphology, optical and photocatalytic properties. The prepared sampleswere analyzed by XRD, TEM, SEM, FT-Raman spectroscopy, N2 physical adsorption, FT-IR, and UVVis spectroscopy. The optical band gaps of SnO2/ZnO nanocomposites were obtained from UV-diffusereflectance spectroscopic studies. The photocatalytic activities of prepared samples increased with thedecrease SnO2 content, which could be explained by increase in charge parting resulting from thecoupling of ZnO with SnO2 due change in potential energy. Additionally, the SnO2/ZnO nanocompositewith the optimal molar ratio was used to change a glassy carbon electrode (GCE) and then employedsuccessfully for the electrochemical sensing of hydrazine at various concentrations using theamperometric technique. The modified GCE showed high sensitivity 1.16 μAμM-1cm-2, linear dynamicrange 2.5 to 25μM (R2 = 0.9997), fast response time within 5s and a limit of detection (LOD) 0.36 μMat (S/N=3).
机译：采用不同含量的SnO2聚乙二醇溶胶-凝胶法合成了SnO2 / ZnO纳米材料。合成的样品在600 oC退火。研究了SnO2 / ZnO的影响，即摩尔比，形态，光学和光催化性能。通过XRD，TEM，SEM，FT-拉曼光谱，N2物理吸附，FT-IR和UVVis光谱分析制备的样品。 SnO2 / ZnO纳米复合材料的光学带隙是通过紫外-漫反射光谱研究获得的。制备的样品的光催化活性随SnO2含量的减少而增加，这可以解释为由于势能的变化而使ZnO与SnO2偶联导致电荷分配增加。此外，使用具有最佳摩尔比的SnO2 / ZnO纳米复合材料来改变玻璃碳电极（GCE），然后使用安培技术成功地用于各种浓度的肼的电化学传感。改进的GCE表现出1.16μAμM-1cm-2的高灵敏度，2.5至25μM的线性动态范围（R2 = 0.9997），5s之内的快速响应时间以及0.36μMat的检出限（LOD）（S / N = 3）。

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