纳米片
吸附
阳离子聚合
材料科学
化学工程
单层
溴化铵
卟啉
烷基
水溶液
粘土矿物
硅烷
有机化学
化学
高分子化学
纳米技术
复合材料
矿物学
肺表面活性物质
工程类
作者
Nanako Nishida,Kyosuke Arakawa,Takahiro Shimada,Shinsuke Takagi
出处
期刊:Langmuir
[American Chemical Society]
日期:2024-02-19
卷期号:40 (12): 6595-6600
标识
DOI:10.1021/acs.langmuir.3c03494
摘要
Clay-silica nanocomposite materials (CSiN) were prepared by an electrostatic interaction between negatively charged clay nanosheets and positively charged spherical silica, which was modified with an alkyl ammonium group by silane coupling. By optimization of the preparation conditions, 84% coverage of the silica surface by the clay nanosheets was achieved. Adsorption experiments using cationic porphyrin dyes on the CSiN revealed that the clay nanosheet covers the spherical silica as a single layer and does not detach from the silica surface under aqueous conditions. In addition, it turned out that the cationic porphyrin dye did not penetrate the space between the silica surface and the clay nanosheet. Porphyrin molecules were adsorbed only at the outer surface of the clay nanosheet without molecular aggregation even under the high-density adsorption conditions. By combining spherical silica and clay nanosheets, it is possible to prepare novel hybrid materials where the surface can act as a unique adsorption field for dyes.
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