Abstract
Gd2O2SO4:Tb3+ nanopieces were synthesized by a combined approach of electrospinning and calcination at 1000°C in mixed gas of sulfur dioxide and air. The nanopieces excited by a 230nm light showed excellent green luminescence with the strongest emission peak at 545nm due to the 5D4→7F5 transition of Tb3+. Interestingly, the intensity of emission peak at 545nm of Gd2O2SO4:Tb3+ nanopieces exhibited about two times stronger than that of the bulk Gd2O2SO4:Tb3+ at the same doping concentrations of Tb3+. Besides, the effects of alkali metal ions doping on the luminescence of the nanopieces have been examined. The emission intensities were further enhanced by alkali metal ions doping, especially for Gd2O2SO4:Tb3+/Li+. The optimal doping concentration of Li+ was 7%.
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