کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
612686 | 880704 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis of highly-ordered mesoporous silica particles using mixed cationic and anionic surfactants as templates Synthesis of highly-ordered mesoporous silica particles using mixed cationic and anionic surfactants as templates](/preview/png/612686.png)
We applied a molecular assembly formed in an aqueous surfactant mixture of cationic cetyltrimethylammonium bromide (CTAB) and anionic sodium octylsulfate (SOS) as templates of mesoporous silica materials. The hexagonal pore size can be controlled between 3.22 and 3.66 nm with the mixed surfactant system. In addition, we could observe the lamellar structure of the mixed surfactants with precursor molecules, which strongly shows the possibility of precise control of both the pore size and the structure of pores by changing the mixing ratio of surfactants. Moreover, use of the cationic surfactant having longer hydrophobic chain like stearyltrimethylammonium bromide (STAB) caused the increase in d100d100 space and shifted the point of phase transition from hexagonal phase to lamellar phase to lower concentration of SOS.
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Journal: Journal of Colloid and Interface Science - Volume 312, Issue 1, 1 August 2007, Pages 42–46