Eu3+ doped La2Ti2O7 nanocrystals with pure monoclinic phase and size of about 100 nm were prepared by a citric acid (CA) assisted sol-gel method.Techniques of thermo-gravimetric (TG) and differential scanning calorimetry (DSC),X-ray diffraction (XRD),as well as transmission electron microscopy (TEM) were employed to characterize the as-synthesized nanoparticles.Furthermore,photoluminescence (PL) performances of the Eu3+ doped La2Ti2O7 nanocrystals were evaluated with focus on the effects of calcination temperature and Eu3+ doping concentration on the photoluminescence properties.