Facile Microwave-Assisted Synthesis of Lanthanide Doped CaTiO3 Nanocrystals

Journal of the Brazilian Chemical Society

Li, Maximo S.¹  Pereira, Sandra C.¹  Universidade Federal de Goiás, Catalão, Brazil¹  Figueiredo, Alberthmeiry T.¹  Longo, Elson¹  Universidade de São Paulo, São Carlos, Brazil¹  Universidade Estadual de São Paulo, Araraquara, Brazil¹  National Institute of Technology Kurukshetra, Haryana, India¹  Stoppa, Marcelo H.¹  Barrado, Cristiano M.¹  Dwivedi, Yashashchandra¹ 

关键词:  luminescence;    spectroscopy;    lanthanide elements;    defect emissions;    nanophosphors;   

DOI  :  10.5935/0103-5053.20150229

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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.

【 授权许可】

Unknown