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采用表面活性剂辅助水热法,制备了一维棒状NaGdF4:Tb3+/Eu3+多色纳米发光材料,对其结构和性能进行了表征。XRD分析表明:所得样品为六方相的NaGdF4,结晶良好,微量的Eu3+,Tb3+对Gd3+的取代没有显著的改变NaGdF4的晶相结构。SEM照片显示:Eu3+单掺NaGdF4和Tb3+,Eu3+双掺NaGdF4纳米发光材料的形貌相同,均为由椭圆形纳米球组成的长约700 nm,直径约100 nm的纳米棒。荧光光谱表明:Tb3+,Eu3+双掺的NaGdF4在500~700 nm之间有很强的绿光和橙红光发射,并且发光强度与Eu3+和Tb3+的掺杂浓度有关。通过调节Tb3+,Eu3+的掺杂量实现了多色发光,发光颜色从绿光区向红光区移动。
A one-dimensional rod-shaped NaGdF4: Tb3 + / Eu3 + multicolor nano-luminescent material was prepared by surfactant-assisted hydrothermal method. Its structure and properties were characterized. The XRD results show that the obtained sample is hexagonal NaGdF4 with good crystallinity. The substitution of trace amounts of Eu3 + and Tb3 + for Gd3 + does not change the crystal phase structure of NaGdF4 significantly. SEM images show that the morphology of the Eu3 + doped single-doped NaGdF4 and Tb3 +, Eu3 + doped double-doped NaGdF4 nano-luminescent materials are all nanorods composed of elliptical nanospheres with a length of about 700 nm and a diameter of about 100 nm. Fluorescence spectra show that Tb3 + and Eu3 + doped NaGdF4 have strong green and orange red emission at 500-700 nm, and the emission intensity is related to the doping concentrations of Eu3 + and Tb3 +. By adjusting the doping amount of Tb3 + and Eu3 +, multi-color luminescence is achieved, and the luminescent color moves from the green region to the red region.