A study of the optical properties of metal-doped polyoxotitanium cages and the relationship to metal-doped titania

Yaokang Lv, Jun Cheng (Corresponding Author), Peter D Matthews, Juan Pedro Holgado, Janina Willkomm, Michal Leskes, Alexander Steiner, Dieter Fenske, Timothy C King, Paul T Wood, Lihua Gan, Richard M. Lambert, Dominic S Wright

Research output: Contribution to journalArticle

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Abstract

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).
Original languageEnglish
Pages (from-to)8679-8689
Number of pages11
JournalDalton Transactions
Volume43
Issue number23
Early online date15 Apr 2014
DOIs
Publication statusPublished - 21 Jun 2014

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Energy gap
Optical properties
Metals
Transition metals
Doping (additives)
Metal ions
titanium dioxide
Impurities
Ions
Nanoparticles

Cite this

Lv, Y., Cheng, J., Matthews, P. D., Holgado, 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(23), 8679-8689. https://doi.org/10.1039/C4DT00555D

A study of the optical properties of metal-doped polyoxotitanium cages and the relationship to metal-doped titania. / Lv, Yaokang; Cheng, Jun (Corresponding Author); Matthews, Peter D; Holgado, Juan Pedro; Willkomm, Janina; Leskes, Michal; Steiner, Alexander; Fenske, Dieter; King, Timothy C; Wood, Paul T; Gan, Lihua; Lambert, Richard M.; Wright, Dominic S.

In: Dalton Transactions, Vol. 43, No. 23, 21.06.2014, p. 8679-8689.

Research output: Contribution to journalArticle

Lv, Y, Cheng, J, Matthews, PD, Holgado, JP, Willkomm, J, Leskes, M, Steiner, A, Fenske, D, King, TC, Wood, PT, Gan, L, Lambert, RM & Wright, DS 2014, 'A study of the optical properties of metal-doped polyoxotitanium cages and the relationship to metal-doped titania', Dalton Transactions, vol. 43, no. 23, pp. 8679-8689. https://doi.org/10.1039/C4DT00555D
Lv, Yaokang ; Cheng, Jun ; Matthews, Peter D ; Holgado, Juan Pedro ; Willkomm, Janina ; Leskes, Michal ; Steiner, Alexander ; Fenske, Dieter ; King, Timothy C ; Wood, Paul T ; Gan, Lihua ; Lambert, Richard M. ; Wright, Dominic S. / A study of the optical properties of metal-doped polyoxotitanium cages and the relationship to metal-doped titania. In: Dalton Transactions. 2014 ; Vol. 43, No. 23. pp. 8679-8689.
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