Photocatalysts pt/S-TiO2 obtained by photodeposition of pt on S-TiO2 synthesized from TiOSO4 through the integrated method sol-Gel/Solvothermal at low temperatures [Fotocatalizadores pt/S-TiO2 obtenidos por fotodeposición de pt sobre S-TiO2 sintetizado a partir de TiOSO4 a través del método integrado sol-Gel/Solvotermal a bajas temperaturas]

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. © 2018 Centro de Informacion Tecnologica. All rights reserved