Powder Technology, Vol.224, 175-182, 2012
Morphology-controlled synthesis, characterization, growth mechanism of SmOHCO3 with high uniform size and photoluminescence property of SmOHCO3:Eu3+
Octahedral and spherical SmOHCO3 particles with uniform sizes had been successfully synthesized on a large scale by a simple hydrothermal method using (NH2)(2)CO as the precipitant without any complex agent. The SmOHCO3 crystal was characterized by X-ray diffraction, X-ray photoelectron spectroscopy. Fourier transform infrared spectroscopy, field-emission scanning electron microscopy and photoluminescence. The molar ratio of (NH2)(2)CO to Sm3+, reaction temperature and reaction time had crucial influences on the morphology and microstructure evolution of the SmOHCO3 crystal. The possible formation mechanisms for the octahedral and spherical SmOHCO3 were proposed. The synthesis and optical properties of SmOHCO3:Eu3+ microcrystals under ultraviolet light excitation were investigated. More importantly, the results showed that the SmOHCO3:Eu3+ samples obtained by using different dosages of (NH2)(2)CO exhibited interesting morphology-dependent optical properties. Furthermore, this general and facile method might be of much significance in the synthesis of many other lanthanide compounds with various morphology and new optical properties. Crown Copyright (C) 2012 Published by Elsevier BM. All rights reserved.