| Tb3+doped LaF3-SiO2nano-composite materials are synthesized by sol-gel method at room temperature. Through XRD, TG-DTA, IR, excitation, emission and3-D spectra, this paper analyzes the materials’structure and the luminescence characteristics. The structure indicates that the optimal doping formula for preparing nano-materials is La5Si95. The LaF3transforms into a stable mineral structure of hexagonal cerium fluoride when the temperature is600℃, the crystal structure is destroyed and transforms into amorphous SiO2structure while it is above800℃. When the optimum annealing temperature is600℃, the monitoring wavelength is544nm, the best excitation wavelength is288nm, and the optimal doping molar concentration of Tb3+is0.25%.At the same time, Eu3+doped LaF3-SiO2nano-composite materials are synthesized by sol-gel method at room temperature, and the structure and properties are characterized by XRD, TG-DTA, IR, excitation, emission and3-D spectra. The structure indicates that the optimal doping formula for preparing nano-materials is La5Si95that transforms into a stable mineral structure of cerium fluoride, and mainly finds Si-O-Si bonds when the temperature is above500℃. Luminous property researches show that the optimum annealing temperature is500℃. The best excitation wavelength is395nm when the monitoring wavelength is612nm, and the optimal doping molar concentration of Eu3+is0.35mol%. In conclusion, this synthesis procedure is environment friendly and is also suitable for the synthesis of other rare earth ions-doped luminescent materials, especially for saving the dosage of rare earth, material cost and improving the luminous efficiency. Comparing with the conventional unitary luminescent materials, the LaF3-SiO2nano-composite materials have more vast application prospects for future, nowadays they have more development space during chemical and biological fields, it is worth sparing no effort while to explore the problem. |
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