Facile Microwave-Assisted Synthesis of Lanthanide Doped CaTiO3 Nanocrystals

AUTOR(ES)

Pereira, Sandra C., Figueiredo, Alberthmeiry T., Barrado, Cristiano M., Stoppa, Marcelo H., Dwivedi, Yashashchandra, Li, Maximo S., Longo, Elson

FONTE

J. Braz. Chem. Soc.

DATA DE PUBLICAÇÃO

2015-11

RESUMO

This article discusses a simple approach for the microwave-assisted synthesis of good quality nanosized calcium titanate crystals doped with trivalent Tm and Yb lanthanide ions. The prepared nanoparticles had a microcube-like structure and a crystallite size of ca. 47 nm. The structure of the nanocrystals was analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and their spectroscopic behavior was examined at a laser excitation wavelength of 350.7 nm. It was found that doping CaTiO3 nanocrystals with Yb and Tm leads to about 250-fold brighter photoluminescence (PL) emissions in the blue and near-infrared regions than that emitted by pure CaTiO3 nanocrystals. The PL emission was correlated with the structural disorder.

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