Effect of the method of preparation on the surface area and porosity of titanium(IV) phenylphosphonate |
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Authors: | María A. Villa-García Enrique Jaimez Anatoly Bortun José R. García Julio Rodríguez |
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Affiliation: | (1) Departmento de Química Orgánica e Inorgánica, Universidad de Oviedo, 33071 Oviedo, Spain;(2) Institute for Sorption and Problems of Endoecology of the Ukrainian Academy of Sciences, 32/34 Palladina prosp., 252142 Kiev, Ukraine |
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Abstract: | By using three synthetic procedures we have prepared layered -titanium phenylphosphonate samples with different degrees of crystallinity and distinct textural parameters. The solids were prepared by reacting phenylphosphonic acid with different titanium compounds used as precursors. The materials obtained have a high thermal stability as shown by TGA measurements.An analysis of nitrogen adsorption-desorption isotherms on the resulting materials allowed determination of the corresponding specific surface area and porous texture. The N2-isotherms correspond to type IV of the BDDT classification with hysteresis loops of the type H-1. The materials are essentially mesoporous and it was not detected any mensurable microporosity. Crystallinity, BET surface areas and porosity are markedly dependent on the preparation procedure. |
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Keywords: | porosity crystallinity textural parameters layered phosphonates |
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