以低聚脲醛树脂为有机碳源前驱体、正硅酸乙酯(TEOS)为无机硅源、表面活性剂F127为模板剂,采用溶剂蒸发诱导自组装(EISA)合成有序介孔碳/二氧化硅杂化材料,研究了碳化温度对于介孔碳/二氧化硅杂化材料比表面积、孔径大小及分布的影响.采用X射线衍射仪(XRD)、热失重分析仪(TGA)、透射电子显微镜(TEM)、氮气吸/脱附等对制备样品进行了表征.结果表明,随着碳化温度的升高,各样品的晶面间距缩小,孔径数值也逐渐变小.碳化温度为850℃时,所得介孔碳/二氧化硅杂化材料孔径较小且孔径尺寸分布较集中.
Ordered mesoporous carbon/silica hybrid materials were synthesized using the oligomer of urea-formaldehyde resin as carbon source,triple copolymer surfactant F127 as template and tetraethylorthosilicate (TEOS) as silica source via evaporation induced self-assembly (ElSA)method.Through changing carbonization temperature,mesoporous carbon/silica hybrid samples with different BET surface areas and pore size distributions were obtained.The materials were characterized by X-ray diffraction (XRD),transmission electron microscope (TEM),Thermo Gravimetric Analyzer (TGA) and nitrogen adsorption-desorption analysis.The results showed that carbonization temperature would directly influence the pore structure.When the carbonization temperature is 850℃,the mesoporous carbon/silica hybrid material with perfect orderliness and narrow pore size distribution can be prepared.
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