Undoped CeO₂, and single and triple doped CeO₂:M (whereM=Dy³⁺, Tb³⁺and Eu³⁺) nanophosphors  were synthesized through a simple sono chemical process and characterized by using X-raydiffraction  (XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), high resolution transmission electron microscopy (HRTEM), EDS and photoluminescence (PL) spectrophotometry. The TEM micrographs show that resultant nanoparticles have flower-likeshape. The doped samples showed multicolor emission on single wave length excitation. Energy transfer was observed from host to the dopantions. Characteristic blue emission from Dy³⁺ ions, green from Tb³⁺ ions and red from Eu³⁺ ions were observed. The CIE coordinates of the triple doped Ce_0.86Dy_0.005Tb_0.055Eu_0.08O₂ nano flowers lie in the white light region of the chromaticity diagram and show promise as good phosphor materials for new lighting devices.