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.

• Fecha de publicación: 2018
• Institución: Universidad de Medellín
• Repositorio: Repositorio UDEM
• Idioma: spa
• OAI Identifier: oai:repository.udem.edu.co:11407/4887
• Acceso en línea: http://hdl.handle.net/11407/4887
• Palabra clave: Photocatalysts; Photodeposition; Pt/S-TiO2; Sol-gel/solvothermal; TiOSO4; Azo dyes; Integrated control; Mesoporous materials; Photocatalysts; Sol-gel process; Sol-gels; Titanium dioxide; Degradation of methyl oranges; Photo-deposition; Photoactive materials; Platinum concentration; TiO2 photocatalyst; TiOSO4; Titanium oxysulfate; Visible radiations; Platinum
• License: http://purl.org/coar/access_right/c_16ec