Construction of tube-wrapped-wire structure ordered porous Tb3+ doped Gd2O3@ZnO composite by situ rearrangement of core-shell structure spheroidal particles in hydrothermal environment

Abstract

Abstract A kind of much novel tube-wrapped-wire morphology ordered porous Tb3+ doped Gd2O3@ZnO composite was obtained by the situ rearrangement of Gd2O3@ZnO composite precursor spheroidal particles in hydrothermal condition, which a wire-like Gd2O3 was wrapped in a ZnO tube whose surfaces were distributed with the ordered mesoporous, and the C12H12O12S3Tb2 complex was distributed between ZnO layer and the Gd2O3 layer. The tube-wrapped-wire morphology were reported piecemeal through the electrospinning method, it was never reported to be prepared through hydrothermal method with the ordered porous on the surface of the tube-wrapped-wire structure as this study. The absorbed ultraviolet light by ZnO shell could promote the emission of C12H12O12S3Tb2, and the penetrable ultraviolet light through the pores could excite the core layer Gd2O3 to sensitize C12H12O12S3Tb2 emission. The porous tube-wrapped-wire structure could reduce the surface reflection process of exciting light, increase its diffuse process in interlayer, and realize internal and external synergy to promote luminescence intensity. The prepared material showed much stronger green emission which was 5.3 times of the prepared 22 Tb3+-H3SSA/ZnO material and 1.5 times of the prepared 22 Tb3+-H3SSA/Gd2O3 material.