[en] We report an effective method to synthesize a red long-lasting phosphorescent material, Y₂O₂S: Eu³⁺, Mg²⁺, Ti⁴⁺ nanotubes. Y(OH)₃ nanotubes were first synthesized by a convenient hydrothermal method to serve as the precursor. Y₂O₂S: Eu³⁺, Mg²⁺, Ti⁴⁺ powders were obtained with high yield and purity by calcinating the precursor in CS₂ atmosphere. The morphology and optical properties of the composites were characterized. XRD investigation showed a pure phase of Y₂O₂S. SEM and TEM observation revealed that the phosphors with diameters of 100-200 nm and lengths of 1-3 μm inherited the tube-like shape from the precursor after being calcinated in CS₂ atmosphere. From the spectrum, the main emission peaks are ascribed to Eu³⁺ ions transition from ⁵D_J (J=0, 1, 2) to ⁷F_J (J=0, 1, 2, 3, 4). After irradiation by 265 or 325 nm, the phosphor emitted red color long-lasting phosphorescence. It was considered that the red-emitting long-lasting phosphorescence was due to the persistent energy transfer from the traps to the Ti⁴⁺ and Mg²⁺ ions.