Artículo
A study of the optical properties of metal-doped polyoxotitanium cages and the relationship to metal-doped titania
Autor/es | Lv, Y.
Cheng, J. Matthews, P.D. Holgado Vázquez, Juan Pedro Willkomm, J. Leskes, M. Steiner, A. Fenske, D. King, T.C. Wood, P.T. Lambert, R. M. Wright, D.S. |
Fecha de publicación | 2014 |
Fecha de depósito | 2019-01-14 |
Publicado en |
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Resumen | To what extent the presence of transition metal ions can affect the optical properties of structurally well-defined, metal-doped polyoxotitanium (POT) cages is a key question in respect to how closely these species model ... To what extent the presence of transition metal ions can affect the optical properties of structurally well-defined, metal-doped polyoxotitanium (POT) cages is a key question in respect to how closely these species model technologically important metal-doped TiO2. This also has direct implications to the potential applications of these organically-soluble inorganic cages as photocatalytic redox systems in chemical transformations. Measurement of the band gaps of the series of closely related polyoxotitanium cages [MnTi14(OEt)28O14(OH)2] (1), [FeTi14(OEt)28O14(OH)2] (2) and [GaTi14(OEt)28O15(OH)] (3), containing interstitial Mn(ii), Fe(ii) and Ga(iii) dopant ions, shows that transition metal doping alone does not lower the band gaps below that of TiO2 or the corresponding metal-doped TiO2. Instead, the band gaps of these cages are within the range of values found previously for transition metal-doped TiO2 nanoparticles. The low band gaps previously reported for 1 and for a recently reported related Mn-doped POT cage appear to be the result of low band gap impurities (most likely amorphous Mn-doped TiO2). |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España |
Identificador del proyecto | ENE2011-24-412
IPT-2011-1553-420000 |
Cita | Lv, Y., Cheng, J., Matthews, P.D., Holgado Vázquez, J.P., Willkomm, J., Leskes, M.,...,Wright, D.S. (2014). A study of the optical properties of metal-doped polyoxotitanium cages and the relationship to metal-doped titania. Dalton Transactions, 43, 8679-8689. |
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