A one-step solvothermal route for the synthesis of nanocrystalline anatase TiO2 doped with lanthanide ions

Spectroscopy Study on the Location and Distribution of Eu3+ Ions in TiO2 Nanoparticles

“…14) Several papers have also reported that the direct excitation into Eu 3þ with light of wavelength longer than 360 nm gives rise to the broad band spectrum. 3,5,13,16,20,25) In this study, we found that different broad band features are observed depending on excitation wavelength within the same Eu 3þ absorption band region. Figure 8 shows the temperature dependence of PL spectra for Eu900 excited at 330 nm.…”

“…Spectra (1) and (2) in Fig. 1 were taken from papers by Falcomer et al 13) and Ikeda et al, 14) respectively. A spectrum quite similar to Spectrum (1) (called broad band spectrum, hereafter) is found in many reports, 1,3,5,[10][11][12][16][17][18][19][20][21][22][23][24]27) while a spectrum similar to Spectrum (2) (called sharp line spectrum, hereafter) has been observed by Li et al 6) The broad band spectrum has its most intense band at 613 nm, while the sharp line spectrum has its at 618 nm.…”

Europium‐Doped Mesoporous Titania Thin Films: Rare‐Earth Locations and Emission Fluctuations under Illumination

“…[24,[29][30] Crystallization of the TiO 2 mesoporous framework is of importance for applying these films in devices that exhibit semiconducting properties, for instance, photovoltaic cells and photocatalysts. [31][32][33] Figure 1 b also shows a comparison of the XRD patterns obtained for a nondoped titania mesoporous film with those obtained for a film doped with europium. The diffraction patterns of both films show a broad signal corresponding to the amorphous phase and diffraction peaks assigned to the crystalline phase.…”

“Unusual Ln3+ substitutional defects”: The local chemical environment of Pr3+ and Nd3+ in nanocrystalline TiO2 by Ln–K edge EXAFS

“…Investigating the local structure of the site or sites occupied by the dopant ions is indeed of great relevance for characterising the luminescence properties of these materials. The interest towards nanocrystalline TiO 2 in the anatase form doped with lanthanide ions is also due to the fact that this class of materials finds important applications in the field of photocatalytic degradation of numerous organic molecules [12,14,15]. Moreover, titanium dioxide is considered a non-toxic compound and for this reason it is interesting to investigate the possibility of developing nanocrystalline luminescent TiO 2 activated with lanthanide ions for use in the field of optical imaging for biomedical purposes [16].…”