摘要
采用油相法制备了单分散性好的Li_3PO_4纳米晶,通过X射线衍射仪(XRD)、透射电子显微镜(TEM)、傅里叶变换红外光谱仪(FTIR)和荧光光谱仪(PL)对样品的形貌、结构和光学特性进行表征。结果表明:油酸与油胺的摩尔比为1∶1时,可以获得分散性好、粒径均一、尺寸为6nm的单斜相Li_3PO_4纳米晶;位于1545cm^(-1)和1448cm^(-1)处-COO-基非对称和对称伸缩振动吸收峰说明样品表面的有机物是通过羧基的氧原子以双齿模式与锂离子配位包覆;在380～625nm处的宽带发射峰为纳米晶表面有机物包覆形成的界面态宽带发射峰。
Monodisperse Li3PO4 nanocrystals were synthesized via an organic solution approach.The nanocrystals were then characterized via conventional techniques including Fourier transform infrared spectrometer (FTIR)and photoluminescence spectra (PL)ect..Research findings show that the Li3PO4 nanocrystals are pure monoclinic phase,well dispersed,uniformly synthesized when the mole ratio of oleic acid/oleylamine is 1:1.Asymmetric and symmetric stretching vibrating absorption peak of COO-in 1545 cm^-1 and 1448cm^-1 given by the FTIR show that the mechanism of the sample's surface modification by the organics might be a coordination of the oxygen atoms of the carboxyl with the lithium ions by a bidentate mode. Photoluminescence emission spectra of the Li3PO4 nanocrystals is made up of a broad emission at 380-625 nm, which maybe due to the midgap state between Li3PO4 and surfactant.
作者
赵舒宁
黄世明
胡亚华
顾牡
刘小林
刘波
张娟楠
ZHAO Shuning;HUANG Shiming;HU Yahua;GU Mu;LIU Xiaolin;LIU Bo;ZHANG Juannan(Shanghai Key Laboratory of Special Artificial Microstructure Materials & Technology,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;College of Nanhu,Jiaxing University,Jiaxing 314001,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2018年第6期888-892,共5页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(11475127).
关键词
油相法
Li3PO4
纳米晶
分散均匀
界面态
organic solution approach
Li3PO4
nanocrystals
homogeneous dispersion
midgap state
