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首页> 外文期刊>RSC Advances >One-pot controlled synthesis of single-crystal alpha-Fe2O3 hollow nanostructure and its gas sensing properties
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One-pot controlled synthesis of single-crystal alpha-Fe2O3 hollow nanostructure and its gas sensing properties

机译：一锅法控制的单晶α-Fe2O3空心纳米结构的合成及其气敏特性

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A series of single-crystal alpha-Fe2O3 nanostructures with tunable morphologies have been prepared via a simple one-pot solvothermal synthesis. The as-prepared nanoparticles were fully characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HR-TEM), selective area electron diffraction (SAED), N-2 adsorption-desorption isotherms, and other techniques. The morphologies of the products can be easily adjusted by controlling the amount of NaAc added; with the amount of NaAc increasing the shell thickness of hollow spheres decreases, till the hollow structures disappeared and changed to nanoflower aggregates. Reaction temperature and the solvent ratio also play important roles in the synthesis of hollow nanospheres. The gas sensing properties of the as-prepared samples were also investigated. The results showed that the samples exhibited good gas sensing properties towards acetone vapor, and the gas sensing behavior was related to the morphologies of the samples.
机译：通过简单的一锅溶剂热合成已经制备了一系列具有可调形态的单晶α-Fe2O3纳米结构。使用X射线衍射（XRD），透射电子显微镜（TEM），高分辨率TEM（HR-TEM），选择性区域电子衍射（SAED），N-2吸附-脱附等温线对制备的纳米颗粒进行了全面表征和其他技术。通过控制NaAc的添加量，可以轻松调整产品的形貌。随着NaAc的增加，空心球的壳厚度减小，直到空心结构消失并变为纳米花聚集体。反应温度和溶剂比在空心纳米球的合成中也起着重要作用。还研究了所制备样品的气敏特性。结果表明，样品对丙酮蒸气具有良好的气敏特性，且气敏行为与样品的形貌有关。

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