Hydrothermal synthesis, characterization and photoluminescence properties of GdOHCO₃ rhombic microcrystals

Abstract

GdOHCO₃ rhombic microcrystals were synthesized by hydrothermal method with urea used as the precipitator. Experimental parameters, such as the molar ratio of the starting reagents, reaction temperature and reaction time were examined. The as-obtained product was characterized by powder X-ray diffraction(XRD), field-emission scanning electron microscopy(FESEM), X-ray photoelectron spectroscopy(XPS), Fourier transform infrared spectroscopy(FTIR) and spectrofluorometry. The main reactions to form GdOHCO₃ were proposed. In addition, the photoluminescence(PL) properties of GdOHCO₃ rhombic microcrystals were discussed. The broad band located between 350 nm and 600 nm in the emission spectrum can be attributed to the self-trapped exciton luminescence.

Keywords

GdOHCO₃ / Hydrothermal method / Crystal growth / Rhombic microcrystal / Photoluminescence

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