Sol-Gel Zirconia: Phosphate Addition Effect

Abstract

Abstract.Zirconia (Zr02) and phosphate zirconia gels were obtained by the sol-gel process. It was used as a precursor to the zirconium n-butoxide in ethanol. The process took place instantly when different solutions containing the ion phosphate, like phosphoric acid and sodium acidic phosphate were added to the initial solution; a hydrolysis catalyst was not used. The samples were characterized by means of X-Ray powder diffraction, Infrared Spectroscopy (FTIR) and Textural Analysis BET. The addition of the phosphate ion produces an increase in the specific area of the samples. The X-Ray diffraction, shows that the tetragonal phase has been stabilized to low annealed temperatures and how the phosphate ion contributes to obtain a second phase, the monoclinic one.

Catalytic Nanomedicine as a Therapeutic Approach to Brain Tumors: Main Hypotheses for Mechanisms of Action

“…Finally, unlike other nanostructures with catalytic properties (such as those used in petrochemistry), the bionanocatalysts for oncological applications have a surface coating with specific molecules, mainly hydracids. By stabilizing the OH groups in the oxide matrix and creating larger stabilities in the solid with high specific areas, the addition of these molecules enhances the physicochemical structure of the external surface [51,62]. Furthermore, as will be described in the following section, surface coating constitutes a vital step in the synthesis of bionanocatalysts since the production of efficient, selective, and specific molecules depends on the surface coating being designed correctly with certain molecules.…”

“…matrix and creating larger stabilities in the solid with high specific areas, the addition of these molecules enhances the physicochemical structure of the external surface [51,62]. Furthermore, as will be described in the following section, surface coating constitutes a vital step in the synthesis of bionanocatalysts since the production of efficient, selective, and specific molecules depends on the surface coating being designed correctly with certain molecules.…”