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采用水热法,以氧化石墨烯为模板,成功合成了NaErF_4六棱柱状微米棒。通过X射线衍射(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等对合成样品的物相结构及晶粒形态进行了表征,研究了NaErF_4微纳米晶在不同n(Er~(3+))∶n(F-)和V(GO)∶V(硅烷)下的生长过程,并提出了其可能的生长机制。产物的室温上转换发光谱显示NaErF_4六棱柱状微米棒具有很强的红光上转换。Er~(3+)的特征绿光和红光上转换发光峰分别位于523nm、540nm和672nm处,红绿强度比(R/G)约为31。
Using hydrothermal method, graphene oxide as a template, successfully synthesized NaErF_4 hexagonal columnar microrods. The phase structure and grain morphology of the synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effects of NaErF_4 micro- 3 +)): n (F-) and V (GO): V (silane), and proposed its possible growth mechanism. The emission spectrum of the product at room temperature shows that the NaErF_4 hexagonal columnar microrods have a strong red upconversion. The characteristic green and red upconversion luminescence peaks of Er ~ (3+) are at 523nm, 540nm and 672nm, respectively, and the ratio of red and green (R / G) is about 31.