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首页> 外文期刊>Physical chemistry chemical physics: PCCP >A novel method for tailoring porous structures of nanoporous materials using supercritical solvents
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A novel method for tailoring porous structures of nanoporous materials using supercritical solvents

机译：一种使用超临界溶剂定制纳米多孔材料多孔结构的新方法

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摘要

Supercritical fluids (SCFs) were used for tailoring the structures of micro- and mesoporous silica with uniform pore sizes, CnFSM-16 (n = 8, 10, 12 and 16), where the value n denotes the carbon atom number in the alkyl chain of the template surfactant. Silica precursors, tetraethylorthosilicate (TEOS) dissolved in supercritical CO2 or in liquid ethanol, were impregnated onto FSM-16. The pore size of all the FSM-16 series decreased after coating in the supercritical solvent. On the other hand, silica was not introduced into pores smaller than that of the C12FSM-16 by coating in the liquid solvent. This is elucidated in terms of the penetration difference into the nanoporous structures of supercritical solvents and liquid solvents. These results are compared with those of activated carbon with various pore sizes coated in supercritical solvents or in liquid solvents. [References: 16]
机译：超临界流体（SCF）用于定制具有均匀孔径CnFSM-16（n = 8、10、12和16）的微孔和中孔二氧化硅的结构，其中n表示烷基链中的碳原子数模板表面活性剂。将溶解在超临界CO2或液体乙醇中的二氧化硅前体原硅酸四乙酯（TEOS）浸渍到FSM-16上。在超临界溶剂中涂布后，所有FSM-16系列的孔径均减小。另一方面，通过涂布在液体溶剂中，二氧化硅没有被引入比C12FSM-16小的孔中。根据超临界溶剂和液体溶剂在纳米孔结构中的渗透差异来阐明这一点。将这些结果与涂覆在超临界溶剂或液体溶剂中的各种孔径的活性炭进行了比较。 [参考：16]

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