Structure analysis and performance research of La,Eu-doped LDHs materials

The samples of Mg-Al-M-hydrotalcite-like(M=Eu,La) compounds were prepared by co-precipitation and through hydrothermal treatment.XRD,FT-IR,TG/DSC and fluorescence spectrum were applied to analyze the structure and determine the properties of the samples.Results of XRD and FT-IR showed that typical diffraction peaks,which indicates the formation of layered structure,are observed in all three samples.TG/DSC curves demonstrate the thermal stability of the samples.Fluorescence spectroscopy analysis indicates that under excitation by 254nm,the Eu-LDHs keep the characteristic spectral.The XRD and infrared spectrum analysis results revealed that a few ions in layers are replaced by La3+,Eu3+ ions in our samples.La3+and Eu3+ successfully insert hydrotalcite layer.Eu-LDHs is a new kind of monochromatic red luminescence materials.