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|Type:||Artigo de periódico|
|Title:||Novel talc-like nickel phyllosilicates functionalized with ethanolamine and diethanolamine|
|Abstract:||Ethanolamine (E) and diethanolamine (D) were incorporated into 3-glycidoxypropyltrimethoxysilane (G) to give two new silylating agents. These agents were used to prepare in sol-gel process talc-like compounds, corresponding to nickel phyllosilicates (Ph), called PhGE and PhGD. Both structures have been confirmed by infrared spectroscopy, solid state NMR for silicon and carbon nuclei, thermogravimetry, X-ray powder diffraction and SEM. The 13 C NMR results showed organic moieties covalently bound on the inorganic framework, while (29)Si NMR revealed the silicon only occupied T positions. The materials presented a well-organized trioctahedral 2:1 structure, indicated by the powder X-ray patterns by the (060) reflection, with basal spacings of 1015 and 1147 pm. Based on the nitrogen amount, 3.08 +/- 0.42 and 2.25 +/- 0.03 mmol g(-1) of silylating agent were grafted onto the inorganic framework. Both phyllosilicates uptake barium ions from aqueous solution to give maximum adsorption of 0.54 +/- 0.05 and 0.81 +/- 0.01 mmol g(-1). (c) 2008 Elsevier B.V. All rights reserved.|
|Editor:||Elsevier Science Bv|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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