Novel Y2O3 coated Y2O3:Eu3+ nanotubes with different coating ratios were synthesized successfully by a facile two-step process, including hydrothermal synthesis of Y(OH)(3) coated Y(OH)(3):Eu3+ as precursors and then calcination of them at 1000 degrees C for 2 h. X-ray diffraction patterns and field emission scanning electron microscope images indicated these Y2O3 coated Y2O3:Eu3+ phosphors possess tubular nanostructures. The photoluminescence properties of Y2O3 coated Y2O3:Eu3+ were systematically investigated by photoluminescence spectra, and photoluminescence enhancement was observed after proper coating. In other words, the coating ratio played a crucial role in photoluminescence efficiency. When it was 1/9, the photoluminescence intensity of D-5(0) -> F-7(2) emission (about 613 urn) was 60% higher than that of Y2O3: Eu3+ phosphors under 255 nm excitation. Therefore, surface coating may be an alternative route for enhanced photoluminescence properties of the Y2O3:Eu3+ red-emitting phosphor. (C) 2015 Elsevier Ltd. All rights reserved.