采用精氨酸辅助水热法,通过调节RE3+和F-源的摩尔比制备出亚微米级六棱柱形13-NaGdF4:Eu3+发光材料,用XRD、FESEM、EDS和荧光光谱对样品的形貌、结构和发光性能进行了表征。结果表明:随着F-源量的增加,样品由空心结构变成实心结构。当RE3+:F-=1:8时制得的表面光滑均匀的NaGdF4:Eu3+空心六棱柱的发光强度最强。以Eu3+的5F0→7F2 跃迁占据主导地位,说明Eu3+占据NaGdF4非对称的1a格位和非对称的1f格位。
Sub-microscale 13-NaGdF4: Eu3+ luminescence materials with hexagonal prism morphology were prepared via arginine-assisted hydrothennal method by conveniently adjusting different molar radio of RE3+ and F source. The XRD, FESEM, EDS and increasing, the shapes of structure, morphology and properties of the samples were characterized by photoluminesence the samples have spectra. The results showed that as the F- content been changed from hollow into solid. The luminescent intensity of NaGdF4: Eu3 + hollow hexagonal prism with smooth and uniform surface was considered to be the best, likewise a fluoride excess (RE3 +: F- = 1:8 ). The 5D0→7F2 was the main transition of Eu3+ , indicating that Eu3 + was occupied in 1 a and 1 f site of NaGdF4.