物理吸附
材料科学
傅里叶变换红外光谱
碳化
化学工程
热重分析
碳纤维
多孔性
活性炭
石墨
石墨烯
拉曼光谱
扫描电子显微镜
纳米技术
化学
有机化学
催化作用
复合材料
吸附
工程类
物理
光学
复合数
作者
Rodolfo de Andrade Schaffner,Carlos Eduardo Borba,Felipe Mattos Tavares,Lígia Gomes Oliveira,Pedro Castaño,Helton José Alves
摘要
Abstract Porous carbon materials such as activated carbons are widely used industrially for the purposes of purification, decolourization, deodorization, and gas storage, among others. Routes for the synthesis of these materials employing templates have increasingly attracted attention due to the ease of manipulating the characteristics of the final product. In the present work, a simple synthesis method was applied for the production of highly porous carbon materials using commercial sugar as the carbon source, Aerosil silica as a template, and deionized water. The synthesis procedure was as follows: (I) Gel formation; (II) carbonization of the gels; (III) removal of the silica template; (IV) activation. The materials were characterized by N 2 and CO 2 physisorption, Raman spectroscopy, X‐ray diffraction, Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscopy, and thermogravimetric analysis. The aging time had an important influence on the specific area and porosity of the material, with physisorption analysis revealing a high specific area and pore volume. The activation procedures further contributed to significantly increasing the specific area (up to 1158 m 2 g −1 ) and pore volume (up to 1.65 cm 3 g −1 ). The X‐ray diffractograms and Raman spectra identified the formation of semi‐crystalline structures in the material, with the presence of a random distribution of graphite and graphene oxide, in addition to amorphous carbon. FTIR analysis showed the presence of bands corresponding to aromatic groups. The results demonstrated that it was possible to obtain materials with excellent potential for use in different industrial sectors using simple raw materials and a technique that is easy to reproduce.
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