Synthesis and luminescence properties of CeF3:Tb3+ nanodisks via ultrasound assisted ionic liquid method
来源期刊：Journal of Rare Earths2014年第6期
论文作者：刘三喜 惠宇 朱玲 范习之 邹兵林 曹学强
文章页码：508 - 513
摘 要：CeF3 and CeF3:Tb3+ nanocrystals were successfully synthesized by the ultrasound assisted ionic liquid（IL） method at room temperature. X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, selected area electron diffraction（SAED）, high-resolution transmission electron micrographs（HRTEM） and photoluminescence（PL） spectra were employed to characterize the nanocrystals. The results of XRD indicated that the obtained samples crystallized well with a hexagonal phase crystal structure. SEM and TEM images demonstrated that the obtained CeF3:Tb3+ nanocrystals had a discoid shape in the presence of ultrasound and IL, whereas only granular nanoparticles were obtained by magnetic stirring. The possible formation mechanisms of the crystal growth were proposed. The PL spectra of the CeF3:Tb3+ nanodisks exhibited a strong green emission when excited at 254 nm. Furthermore, the photoluminescence intensity of CeF3:Tb3+ of the discoid particles was largely improved compared with that of the granular nanoparticles.
刘三喜1，惠宇2，朱玲1，范习之2，邹兵林2，曹学强2
1. Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation,School of Chemistry and Biological Engineering,Changsha University of Science and Technology2. State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences
摘 要：CeF3 and CeF3:Tb3+ nanocrystals were successfully synthesized by the ultrasound assisted ionic liquid（IL） method at room temperature. X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, selected area electron diffraction（SAED）, high-resolution transmission electron micrographs（HRTEM） and photoluminescence（PL） spectra were employed to characterize the nanocrystals. The results of XRD indicated that the obtained samples crystallized well with a hexagonal phase crystal structure. SEM and TEM images demonstrated that the obtained CeF3:Tb3+ nanocrystals had a discoid shape in the presence of ultrasound and IL, whereas only granular nanoparticles were obtained by magnetic stirring. The possible formation mechanisms of the crystal growth were proposed. The PL spectra of the CeF3:Tb3+ nanodisks exhibited a strong green emission when excited at 254 nm. Furthermore, the photoluminescence intensity of CeF3:Tb3+ of the discoid particles was largely improved compared with that of the granular nanoparticles.
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