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Información tecnológica

versión On-line ISSN 0718-0764

Resumen

GALEANO, Laila; NAVIO, José A; RESTREPO, Gloria M  y  MARIN, Juan M. Preparation of Titanium Oxide/Silicon Oxide (TiO2/SiO2) systems through the solvothermal method for applications in photocatalysis. Inf. tecnol. [online]. 2013, vol.24, n.5, pp.81-92. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642013000500010.

Abstract Titanium Oxide/Silicon Oxide (TiO2/SiO2) systems were obtained by anchoring TiO2 in SiO2. The TiO2 photocatalyst was obtained by alcoholysis of TiCl4 with 2-propanol and subsequent crystallization under autogenous pressure at 200 °C, excluding calcination steps at high temperatures. SiO2/TiCl4 at different ratios were used to determine their influence on stability properties and photoactivity of TiO2/SiO2 systems. The photocatalytic activity was evaluated by the photodegradation of methanol in gaseous phase. The TiO2 did crystallize as anatase phase or as a mixture rutile/anatase, depending on the initial SiO2/TiCl4 ratio. The results showed that composite materials with high crystalinity of TiO2 are produced. It was also observed that there is a strong relationship between the photocatalytic activity and physicochemical properties and of these with the initial compositions used for the synthesis.

Palabras clave : TiO2/SiO2 systems; photocatalysis; solvothermal method; composite materials.

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