Thomou Eleni, Diamanti Evmorfia K, Enotiadis Apostolos, Spyrou Konstantinos, Mitsari Efstratia, Boutsika Lamprini G, Sapalidis Andreas, Moretón Alfonsín Estela, De Luca Oreste, Gournis Dimitrios, Rudolf Petra
Department of Materials Science and Engineering, University of Ioannina, Ioannina, Greece.
Zernike Institute for Advanced Materials, Faculty of Science and Engineering, University of Groningen, Groningen, Netherlands.
Front Chem. 2020 Sep 17;8:564838. doi: 10.3389/fchem.2020.564838. eCollection 2020.
In this work, we report on a facile and rapid synthetic procedure to create highly porous heterostructures with tailored properties through the silylation of organically modified graphene oxide. Three silica precursors with various structural characteristics (comprising alkyl or phenyl groups) were employed to create high-yield silica networks as pillars between the organo-modified graphene oxide layers. The removal of organic molecules through the thermal decomposition generates porous heterostructures with very high surface areas (≥ 500 m/g), which are very attractive for potential use in diverse applications such as catalysis, adsorption and as fillers in polymer nanocomposites. The final hybrid products were characterized by X-ray diffraction, Fourier transform infrared and X-ray photoelectron spectroscopies, thermogravimetric analysis, scanning electron microscopy and porosity measurements. As proof of principle, the porous heterostructure with the maximum surface area was chosen for investigating its CO adsorption properties.
在本工作中，我们报道了一种简便快速的合成方法，通过对有机改性氧化石墨烯进行硅烷化反应，制备具有定制性能的高度多孔异质结构。使用了三种具有不同结构特征（包含烷基或苯基）的二氧化硅前驱体，以在有机改性氧化石墨烯层之间形成高产率的二氧化硅网络作为支柱。通过热分解去除有机分子，生成具有非常高比表面积（≥500 m²/g）的多孔异质结构，这对于催化、吸附以及作为聚合物纳米复合材料中的填料等多种潜在应用具有很大吸引力。最终的杂化产物通过X射线衍射、傅里叶变换红外光谱和X射线光电子能谱、热重分析、扫描电子显微镜和孔隙率测量进行了表征。作为原理验证，选择了具有最大表面积的多孔异质结构来研究其对CO的吸附性能。
