Biomimetic synthesis of mesoporous silica support with a three-dimensional large-pore ordered structure
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摘要: 介孔二氧化硅作为固定漆酶的载体,在降解氯酚农药研究中意义重大。以正硅酸乙酯(TEOS)为硅源,以不同链长的长链烷基三甲基溴化铵(CnTAB,n = 12,14,16,18)和两性生物表面活性剂椰油基甘氨酸钠(YCS)为混合模板剂,仿生合成了具有三维六方结构的有序介孔二氧化硅。和传统介孔二氧化硅载体相比,三维六方介孔二氧化硅具有较大的孔径及比表面积,且相邻孔道之间发生相互的连通。当使用链长为C16以上的阳离子表面活性剂和YCS混合时,得到孔径为9 nm左右,且具有不同形貌的大孔径介孔二氧化硅,为酶的固定化提供了优良载体。图8表2参22Abstract: Mesoporous silica was used as a support to immobilize enzyme (laccase) that were important in chlorphenol degeneration research. To biomimetically synthesize the mesoporous silica with an ordered three-dimensional (3D),hexagonal structure,cationic surfactants,alkyltrimethylammonium bromides (CnTAB,n = 12,14,16,and 18) with different chain lengths and an amphoteric biological surfactant,Sodium N-dodecyl glycine (YCS),were used as mixed templates in a mixture of H2SO4 as the acid source and tetraethyl orthosilicate(TEOS) as the silica source. The biomimetic synthesizing was successful. Compared with traditional mesoporous silica support,the 3D hexagonal mesoporous silica had a larger pore diameter (5 - 10 nm) and surface area. The adjacent pore channel occurred pore link. Using C16TAB or C18TAB along with YCS as mixed templates,mesoporous silica with a pore diameter of about 9 nm was obtained. Mesoporous silica with different morphologies and large pore diameter also provided excellent support for immobilizing laccase.[Ch,8 fig. 2 tab. 22 ref.]
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Key words:
- inorganic chemistry /
- large pore /
- mesoporous silica /
- biomimetic synthesis
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2010.03.019
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