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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedad Mexicana de Física A.C.
2004
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| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57062711 |
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- Photo-oxidation of water sensitized by TiO2 and WO3 in presence of different electron acceptors A. Mills M. A. Valenzuela Física, Astronomía y Matemáticas WO3 TiO2 water oxidation electron acceptor Semiconductor photosynthesis The photo-oxidation of water is studied in presence of UV-light (¸ < 400 nm) using titanium dioxide (TiO2) and tungsten oxide (WO3;microandnano-crystalline) semiconductors in presence of different sacrificial electron acceptors (SEA): Fe(NO3)2, Na2S2O8, Ce(SO4)2,Co[(NH3)5Cl]Cl2, AgNO3, HgCl2 and Cu(NO3)2. TiO2 is 5 to 10 times more photoactive than WO3 with reference to oxygen evolution.Ag ions are the best of the SEAs, for all the semiconductors tested in the photo-redox process. No oxygen evolution is observed whenHg2+ or Cu2+ ions are used as SEAs. The effect of high (10-2 mol dm-3) and low (10-3 mol dm-3) SEA concentrations is also studied but no common trend is observed. Instead, each system (i.e., SEA+H2O+Semiconductor) exhibits a different behaviour and the results arerationalised in terms of the spectral and redox potential features of the system. 2004 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57062711 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.Re3 Vol.50