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Título

Correlation study between photo-degradation and surface adsorption properties of phenol and methyl orange on TiO2 Vs platinum-supported TiO2

Autor Murcia, J.J.; Hidalgo, M.C. ; Navío, José Antonio ; Araña, J.; Doña-Rodríguez, J.M.
Fecha de publicación 2014
EditorElsevier
Citación Applied Catalysis B: Environmental 150-151: 107- 115 (2014)
ResumenAdsorption of phenol and methyl orange on the surface of TiO2 and Pt-TiO2 photocatalysts was investigated by FT-IR spectroscopy. It was found that platinum plays an important role in the adsorption properties of the studied substrates on TiO2. Platinum deposits modified the phenol-photocatalyst interaction providing new adsorption sites on TiO2 surface. On Pt-TiO2 photocatalysts, phenol mainly interacts via formation of adsorbed phenolates species. It was also found that the adsorption of methyl orange on titania and Pt-TiO2 photocatalysts occurs via interaction of the azo group with surface Ti4+. Pt photodeposition significantly increases the TiO2 photoreactivity in phenol and methyl orange photo-degradation; however, this increase depends on the properties of the Pt deposits. Moreover, it was observed that platinum content is the main factor determining the substrate-photocatalyst interaction and therefore the Pt-TiO2 photocatalytic performance. © 2013 Elsevier B.V.
URI http://hdl.handle.net/10261/103622
DOI10.1016/j.apcatb.2013.12.010
Identificadoresdoi: 10.1016/j.apcatb.2013.12.010
issn: 0926-3373
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