Spherical Particles of Zirconia-Titania of Hexagonal Structure from a Neutral Amine Route |
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Authors: | de Farias RF Airoldi |
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Institution: | a Departamento de Química, Universidade Federal de Roraima, 69310-270, Boa Vista, Roraima, Brazil;b Instituto de Química, Universidade Estadual de Campinas, C.P. 6154, 13083-970, Campinas, São Paulo, Brazil |
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Abstract: | Through the sol–gel process, using the so-called neutral amine route, spherical particles of 1:1 zirconia–titania were synthesized from zirconium(IV) and titanium(IV) butoxides as well as 1,12-diaminododecane as precursor species. The obtained product exhibited a hexagonal structure, as determinated by X-ray diffraction data. The obtained material was also characterized by thermogravimetry, differential scanning calorimetry, infrared spectroscopy, scanning electron microscopy, and surface area measurements. Despite the release of template molecules on heating, the spherical morphology was retained up to about 1200°C, at which the disruption of the spheres took place. |
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Keywords: | zirconia titania sol– gel spheres neutral amine route |
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