Buscar

Estamos realizando la búsqueda. Por favor, espere...

Structural, optical and photoluminescence properties of TiO2 and TiO2: Tm3+ nanopowders

Abstract: Tm3+-doped TiO2 nanocrystalline powders (in the range from 0.0 to 6 at. % of Tm3+) were synthesized by the sol-gel method at 500 °C. Structural, optical and photoluminescence properties were characterized by X-ray diffraction, transmission and scanning electron microscopy (TEM, SEM), UV?vis spectroscopy and photoluminescence spectroscopy. From XRD results all compositions show anatase structure, and the incorporation of Tm3+ promoted an increase in lattice parameters and inhibit the crystal growth. HRTEM micrographs show the presence of d-plane spacings corresponding to Tm2O3 and Tm2Ti2O7 phases for samples annealed at 500 °C. FTIR, reflectance UV?vis and photoluminescent spectra showed well defined bands ascribed to the Tm3+ f-f transition. Vacuum referred binding energy diagram and chemical shift model approach are presented to analyze the relationship between the TiO2 electronic structure and the Tm3+ f-f transition.

 Autoría: Borrego-Pérez J.A., González F., Meza-Avendaño C.A., De Los Santos I.M., López-Juárez R., Hernández I., Alonso-Guzman E.M., Martinez-Molina W., Chavez-Garcia H.L.,

 Fuente: Optik, 2021, 227, 166083

 Editorial: Elsevier

 Fecha de publicación: 01/02/2021

 Nº de páginas: 13

 Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.ijleo.2020.166083

 ISSN: 0030-4026,1618-1336

 Url de la publicación: https://doi.org/10.1016/j.ijleo.2020.166083

Autoría

BORREGO-PÉREZ, J. A.

GONZÁLEZ, FEDERICO

MEZA-AVENDAÑO, C. A.

MONTOYA DE LOS SANTOS, I.

LÓPEZ-JUÁREZ, RIGOBERTO

ALONSO-GUZMAN, E. M.

MARTINEZ-MOLINA, W.

CHAVEZ-GARCIA, H. L.