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Preparation of monolithic transparent mesoporous silica and mesoporous onion-like carbon

机译:单片透明介孔二氧化硅和中孔洋葱状碳的制备

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Large-sized, crack-free silica monoliths have been fabricated by a fast and convenient way via EISA method using P123 as soft template and 1-hexadecyl-3-methylimidazolium bromide ([C16mim]Br) as additive. The hydrogen bonds formed between ILs and the silano groups of silica gel play crucial roles in the form of the bulk, transparent silica monolith. The mesoporous structure onion-like carbon monoliths were prepared with the transparent silica monolith as template via the nanocasting technique. The mesoporous silica and carbon monoliths have been characterized by the XRD, HRTEM, N_2 sorption and elemental analysis. The results reveal that pore diameter of the mesoporous carbon about 3.47nm, and the specific surface area of carbon with a nitrogen content of 4.2%, can be tuned from 408.2-629.0m~2/g. HRTEM shows that this carbon material with nanoonions structure.
机译:通过使用P123作为软模板和1-十六烷基-3-甲基咪唑溴([C16MIM] BR)作为添加剂,通过EISA方法通过EISA方法进行了大规模的无裂缝的二氧化硅单片。在ILS和硅胶基团之间形成的氢键在散装透明二氧化硅整料的形式中起重要的作用。通过纳米型技术用透明二氧化硅单片制备介孔结构洋葱状碳整体溶液。中孔二氧化硅和碳整料的特征在于XRD,HRTEM,N_2吸附和元素分析。结果表明,介孔碳的孔径约3.47米,氮含量为4.2%的碳的比表面积可从408.2-629.0m〜2 / g调节。 HRTEM显示这种具有纳多结构的碳材料。

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