Encapsulation of titanium (IV) silsesquioxane into the NH4USY zeolite: Preparation, characterization and application
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Data
2007-10-02
Autores
do Carmo, Devaney Ribeiro
Dias Filho, Newton Luiz
Stradiotto, Nelson Ramos
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Editor
Elsevier B.V.
Resumo
This work describes the encapsulation of titanium (IV) silsesquioxane into the supercavities of NH4USY ultra stabilized zeolite, after chemical treatment. The modified zeolite was characterized by Fourier transform infrared spectra, Nuclear magnetic resonance, scanning electronic microscopy, X-ray diffraction and thermogravity. This encapsulated titanium (IV) silsesquioxane can adsorb Azure A chloride after treatment with H3PO4, without modifier leaching problems. In an electrochemical study, the cyclic voltammograms of the graphite paste modified electrode, shows two redox couples with formal potential (E-0) -0. 1 V and 0.21 V to I and II redox couples respectively (v = 700 mV s(-1); Britton Robinson buffer (B-R) solution, pH 3) versus SCE ascribed to a monomer and dimmer of azure. This paper shows the use of ultra stabilized zeolite in the electrochemical field as host for molecules with nanometric dimensions. (c) 2006 Elsevier Ltd. All rights reserved.
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nanostructures, surfaces, chemical synthesis, infrared spectroscopy, nuclear magnetic resonance (NMR)
Como citar
Materials Research Bulletin. Oxford: Pergamon-Elsevier B.V., v. 42, n. 10, p. 1811-1822, 2007.