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首页> 外文期刊>Applied Surface Science >Synthesis And Characteristics Of Continuous Mesoporous Carbon Films By A Rapid Solvent Evaporation Method
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Synthesis And Characteristics Of Continuous Mesoporous Carbon Films By A Rapid Solvent Evaporation Method

机译：快速溶剂蒸发法制备连续中孔碳膜及其特性

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摘要

Carbon films with a well-developed meso-porosity were synthesized directly by the carbonization of sulfuric-acid-treated P123 triblock copolymer/silica nanocomposite films, which were prepared from dip-coating technique through an association of sol-gel and evaporation-induced self-assembly process, and the residual silica was removed subsequently via HF-etching. P123 was employed as both structuring agent for self-assembly of tetraethyl orthosilicate and carbon precursor. The sulfuric acid solution was used as a catalyst for cross-linking of P123/silica in order to improve the carbon yield for the continuity of carbon films. Investigations by Field emission scanning electron microscopy (FESEM), X-ray diffraction, nitrogen adsorption measurement and transmission electron microscopy (TEM) indicate that the hybrid carbon/silica mesoporous films are preserved perfectly after the carbonization. When the silica is removed by acid treatment, continuous carbon films with an ordered symmetric structure are still kept well. The carbon films obtained are composed of carbon nanotubes with the diameter of around 6 nm, and the lengths of nanotubes affiliating with each other vary from about 100 nm to several micrometers, which were measured by FESEM and TEM.
机译：通过硫酸处理的P123三嵌段共聚物/二氧化硅纳米复合膜的碳化，直接合成了具有良好介孔性的碳膜，该碳膜是通过浸涂技术，溶胶-凝胶和蒸发诱导的自反应的结合而制备的-组装过程，然后通过HF蚀刻除去残留的二氧化硅。 P123用作原硅酸四乙酯和碳前体的自组装结构剂。硫酸溶液用作P123 /二氧化硅交联的催化剂，以提高碳膜连续性的碳收率。通过场发射扫描电子显微镜（FESEM），X射线衍射，氮吸附测量和透射电子显微镜（TEM）进行的研究表明，碳化后，碳/二氧化硅介孔杂化膜得以完美保存。当通过酸处理除去二氧化硅时，具有规则对称结构的连续碳膜仍保持良好。所获得的碳膜由直径约6nm的碳纳米管组成，彼此附着的纳米管的长度在约100nm到几微米之间变化，这通过FESEM和TEM测量。

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