Synthesis of the wire-in-tube structure porous C₁₂H₁₂O₁₂S₃Tb₂@g-C₃N₄/ZnO luminescent composite in hydrothermal condition

The wire-in-tube structure was often prepared by electrostatic spinning method, and a kind of novel wire-in-tube structure porous C₁₂H₁₂O₁₂S₃Tb₂ @g-C₃N₄/ZnO luminescent material was obtained by hydrothermal method in this study in which a wire-like C₁₂H₁₂O₁₂S₃Tb₂ was wrapped in the inner layer of the porous tube-like g-C₃N₄/ZnO shell layer, and an obvious g-C₃N₄ narrow edge layer was distributed on the outer layer of the tube-like structure. Due to the wire-in-tube structure and the stronger UV absorption capacity of g-C₃N₄/ZnO matrix and organic ligand (SSA), the characteristic emission of Tb was greatly enhanced in the C₁₂H₁₂O₁₂S₃Tb₂ @g-C₃N₄/ZnO phosphors which showed a very strong green light emission at 543 nm. On the other hand, the g-C₃N₄ shows much better absorbing ability to visible light which has been rarely used to optimize the luminescence properties of rare earth materials. In this study, the g-C₃N₄ showed the absorption to 490 nm emission light which was precisely used to improve the emission at 543 nm.