Resumo

BARRERA, María C.; VINIEGRA, Margarita; ESCOBAR, José  e  DE LOS REYES, José A.. Control de las propiedades texturales de ZrO₂-TiO₂ Sol-Gel: Efecto de parámetros de síntesis. Rev. Soc. Quím. Méx [online]. 2002, vol.46, n.2, pp.73-78. ISSN 0583-7693.

ZrO₂-TiO₂ at different compositions was prepared by low temperature sol-gel method with HNO₃, NH₄OH and CH₃COOH as additives. The alcogels were calcined (300-700 °C) and characterized by N₂ physisorption, XRD and TGA-DTA. By varying the composition, the H₂O / alkoxide and additive/alkoxide ratios and the type of additive it was possible to modulate the textural properties of the prepared oxides. The TiO₂-rich formulation (85 w %) was the one with larger pores (5-8 nm). The maximum in surface area was found for samples of composition near the equimolar (samples calcined at 500 °C).

Palavras-chave : ZrO₂-TiO₂; synthesis; textures.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )