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Synthesis and physicochemical properties of graphene/ZrO2 composite aerogels

机译：石墨烯/ ZrO2复合气凝胶的合成及其理化性质

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摘要

Aerogel materials possess a wide variety of exceptional properties, including a quite low density, high specific surface area, high porosity, etc. Considering that both graphene aerogels and ZrO2 aerogels have advantages and disadvantages respectively, graphene/ZrO2 composite aerogels are prepared, by a facile step, to enable them to have low thermal conductivity and to enhance the electronic interaction between the ZrO2 nanoparticles and graphene sheets. The chemical composition and crystalline structure of the resulting graphene/ZrO2 composite aerogels, as well as the strong interaction between the graphene sheets and the ZrO2 nanoparticles, have been disclosed by X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and X-ray powder diffraction (XRD). The morphology and hierarchically porous attributes of the resulting graphene/ZrO2 composite aerogels have been investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption-desorption tests. The mechanical properties, electrical conductivity, electrochemical properties and thermal conductivity (as well as thermal stability) of the resulting graphene/ZrO2 composite aerogels have also been revealed in this study.
机译：气凝胶材料具有多种优异的性能，包括密度非常低，比表面积高，孔隙率高等。考虑到石墨烯气凝胶和ZrO2气凝胶分别具有优点和缺点，可以通过以下方法制备石墨烯/ ZrO2复合气凝胶：容易的步骤，以使它们具有较低的热导率并增强ZrO2纳米粒子与石墨烯片之间的电子相互作用。 X射线光电子能谱（XPS），拉曼光谱和X射线粉末已经揭示了所得石墨烯/ ZrO2复合气凝胶的化学组成和晶体结构，以及石墨烯片与ZrO2纳米颗粒之间的强相互作用。衍射（XRD）。使用扫描电子显微镜（SEM），透射电子显微镜（TEM）和氮吸附-脱附测试研究了所得石墨烯/ ZrO2复合气凝胶的形貌和分层多孔属性。这项研究还揭示了所得石墨烯/ ZrO2复合气凝胶的机械性能，电导率，电化学性能和热导率（以及热稳定性）。

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