期刊
LANGMUIR
卷 28, 期 19, 页码 7505-7511出版社
AMER CHEMICAL SOC
DOI: 10.1021/la300390s
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资金
- Global COE of MEXT
- Waseda University [2011A-604, 2010B-061]
The surface modification of a layered alkali silicate, octosilicate (Na(2)Si(8)o(17)center dot nH(2)O), with a sulfonic acid group was conducted. The sulfonic acid group was attached to the silicate layer by the reaction of octosilicate with phenethyl(dichloro)methylsilane and the subsequent sulfonation of the attached phenethyl groups with chlorosulfonic acid. The modified octosilicate is a solid acid as indicated by the intercalation of dodecylamine. A systematic expansion of the interlayer space was observed by the ion exchange with a series of alkyltrimethylammonium ions to show the variation of the layer charge density.
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