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- W2897025051 abstract "Hybrid imogolite aluminosilicate nanotubes with methylated internal surface can be obtained by introduction of the corresponding organosilane during their synthesis. However, similarly to pristine imogolite, a number of side products, including proto-imogolite (open-imoLS), allophanes, and aluminum hydroxides, are formed, which ultimately impact on the properties of the dispersions. In order to minimize the proportion of these side products, we have here systematically explored the impact of the initial Si/Al ratio on the content of hybrid imogolite dispersions before and after dialysis. By combining cryo-transmission electron microscopy, inductively coupled plasma mass spectrometry, infrared spectroscopy, and small-angle X-ray scattering, we evidenced that the Si/Al ratio has a large impact on the formation of aluminum hydroxides that can be minimized with a slight excess of Si precursor. However, a large excess of Si is detrimental to the reaction yield leading to an important proportion of proto-imogolite. We propose that the optimal Si/Al ratio of ca. 0.6 can both minimize the proportion of aluminum hydroxides and proto-imogolite. These results suggest that the dynamic and therefore reactive character of imogolite dispersions may have been so far underlooked." @default.
- W2897025051 created "2018-10-26" @default.
- W2897025051 creator A5053906395 @default.
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- W2897025051 date "2018-10-08" @default.
- W2897025051 modified "2023-10-18" @default.
- W2897025051 title "Exploring Hybrid Imogolite Nanotube Formation via Si/Al Stoichiometry Control" @default.
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- W2897025051 doi "https://doi.org/10.1021/acs.langmuir.8b01075" @default.
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