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Información tecnológica

versión On-line ISSN 0718-0764

Resumen

MALO, Jorge E.; MEJIA, María I.  y  MARIN, Juan M.. Photocatalysts Pt/S-TiO 2 obtained by Photodeposition of Pt on S-TiO 2 Synthesized from TiOSO 4 through the Integrated Method Sol-Gel/Solvothermal at low Temperatures. Inf. tecnol. [online]. 2018, vol.29, n.4, pp.97-100. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642018000400097.

Photoactive materials Pt/S-TiO2 were obtained by photodeposition of Pt on S-TiO2 photocatalyst synthesized from titanium oxysulfate (TiOSO4) using the integrated method sol-gel/solvothermal at low temperatures (250°C). The photodeposition was performed changing platinum concentration by 0.2% and 0.5% w/w and using two residence times of 60 min and 120 min. The properties of materials were determined by analysis of DRX, Raman, XRF, FTIR-ATR, XPS, UV-vis/DRS, SEM, EDX, TEM, surface area and porosity. The obtained materials were mesoporous and crystallized as anatase phase, incorporating 0.31% of S (by weight) and 85% of the nominal Pt value, showing absorption and photoactivity in both ultraviolet and visible radiation. The material prepared with higher Pt content and longer photodeposition time, 0.5/120 Pt/S-TiO2, reached the highest UV and visible photoactivities in the degradation of methyl orange in the liquid phase.

Palabras clave : photocatalysts; TiOSO4; sol-gel/solvothermal; Pt/S-TiO2; photodeposition.

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