LAUSR

Abstract A series of Tb-doped MgAl–NO 3 layered double hydroxides (LDHs) with Mg 2+ /(Al 3+ +Tb 3+ ) molar ratios ranging from 1.0 to 4.0 were synthesized through co-precipitation method at room temperature. X-ray diffraction (XRD) results indicated that the crystallinity of all the Tb-doped samples presented a single phase corresponding to LDHs. SEM measurement suggested that all the samples have similar morphologies. Fluorescence spectra show strong green emissions at 490 and 544 nm, ascribed to the 5 D 4 → 7 F 6 and 5 D 4 → 7 F 5 transition of Tb 3+ , respectively. This result revealed that the MgAl–NO 3 LDH system was favorable for the green emissions of Tb 3+ ions.