Resumo

LOPEZ, Luis et al. COMPARACIÓN ESTRUCTURAL Y MORFOLÓGICA DE TiO₂ SINTETIZADOS POR LA RUTA DE LOS ATRANOS Y LA RUTA CONVENCIONAL EN EL MÉTODO SOL-GEL. Rev. Bol. Quim [online]. 2011, vol.28, n.2, pp.106-113. ISSN 0250-5460.

ABSTRACT   Powder of TiO₂ was synthesized by the “route of the atranes” (new precursory Titanatrane) and for the conventional route (precursory alkoxide, Tetrabutil Titanato) both through sol-gel method, burned at 400, 500 and 600°C. The structural characterization and morphological by technical DRX, TOC, SEM and DRS are related with the temperature of burned and precursor to define the properties of the TiO₂. The TiO₂ obtained using Titanatrano precursory presents amorphous particles with microdomains crystalline in anatase phase, high organic content (394 ppm C/TiO₂ up to 400°C), narrow distribution in the average size of particle and quasi spherical morphology. The TiO₂ obtained using Alkoxide precursory present amorphous particles with crystalline microdominios in phases anatase and brookite at 400 and 500°C, and in phases anatase and rutile at 600°C, low organic content (» 5 ppm C/TiO₂), wide distribution in the average size of particle and irregular morphology. The magnitudes of the values in Bg correspond to the phases crystalline of anatase (400, 500 and 600°C both precursors) and rutile (600°C Alkoxide). The differences in the properties of TiO₂ are explained in function to the behaviours of the precursors in the process sol-gel and in the process of burned

Palavras-chave : TiO₂; Sol-Gel method; Atrane Route; Titanatrane; Alkoxide; Structure-Morphology.

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