2014
DOI: 10.1021/jp501203h
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Fluorine- and Niobium-Doped TiO2: Chemical and Spectroscopic Properties of Polycrystalline n-Type-Doped Anatase

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Cited by 67 publications
(60 citation statements)
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“…20 This species exhibits an anisotropic g tensor with rhombic symmetry, g xx a g yy a g zz . 24 The shape of the signal however seems to confirm substitutional bulk Ti 3+ as observed in Nb-doped or F-and Nb-codoped anatase by Biedrzycki et al 7 The presence of Ti 3+ can be explained by ion substitution and charge compensation. The values reported in Table 1 are in good agreement with those reported elsewhere.…”
supporting
confidence: 62%
See 1 more Smart Citation
“…20 This species exhibits an anisotropic g tensor with rhombic symmetry, g xx a g yy a g zz . 24 The shape of the signal however seems to confirm substitutional bulk Ti 3+ as observed in Nb-doped or F-and Nb-codoped anatase by Biedrzycki et al 7 The presence of Ti 3+ can be explained by ion substitution and charge compensation. The values reported in Table 1 are in good agreement with those reported elsewhere.…”
supporting
confidence: 62%
“…7,26 The visible light photo-induced electron injection is mainly driven by the discrete N donor levels situated in the band gap, Fig. However, as already highlighted by Biedrzycki et al, 7 aliovalently doped systems seem to selectively favour the solution of higher stability, hence the extensive presence of Ti 3+ ions would indicate much higher contribution of the mechanism of valence induction over that one of vacancy formation.…”
mentioning
confidence: 90%
“…11,14 Nitrogen bulk quantification is quite a challenging task, since conventionally used techniques, such as X-ray photoelectron spectroscopy (XPS), provide information about the surface and near-subsurface composition of the oxide, which is greatly influenced by the presence of atmospheric contaminants (C, N and O). 8 Previous studies on Nb-doped TiO2 have also underlined other relevant discrepancies between bulk and surface compositions in such systems, such as a higher Nb content at the surface due to the occurrence of surface segregation phenomena 58 . Further, Bartlett and coauthors 36 reported by XPS the absence of any Ti 3+ in heavily N,Nb-codoped samples, which was instead detected by EPR analyses.…”
Section: Resultsmentioning
confidence: 99%
“…However, most of the previous studies indicate that the anatase TiO 2 exhibits unintentional n-type conductivity, while a stable p-type conductivity is difficult to obtain. 10,11 Therefore, the preparation of TiO 2 with good p-type conductivity is especially important for photoelectron and photochemistry applications.…”
Section: Introductionmentioning
confidence: 99%