A highly efficient up-conversion fluorescent nanomaterial based on ytterbium molybdate matrix and its preparation method and application
A technology of nanocrystalline materials and luminescent materials, applied in the field of materials, can solve the problems of limiting the popularization and application of light-frequency up-conversion materials and low up-conversion fluorescence quantum yields
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[0074] The present invention also provides a preparation method of the material, comprising the steps of:
[0075] 1) provide a mixed solution, the mixed solution comprises ytterbium salt, the salt of rare earth element X, molybdate and the solvent for dissolving the aforementioned salt;
[0076] 2) heat-treating the mixed solution to obtain a solid precursor;
[0077] 3) optionally drying the solid precursor obtained in step 2);
[0078] 4) Calcining the product obtained in the preceding steps under an air atmosphere to obtain the material.
[0079] In another preferred embodiment, the ytterbium salt is selected from substances including (but not limited to) the following group: acetate, haloacetate, halide salt, or a combination thereof.
[0080] In another preferred example, the salt of the rare earth element X is selected from the group including (but not limited to): acetate, haloacetate, halide salt, or a combination thereof.
[0081] In another preferred embodiment, ...
Embodiment 1
[0125] Preparation of Ytterbium Trifluoroacetate and Erbium Trifluoroacetate
[0126] 1) Add an appropriate excess of ytterbium oxide (about 1g) or erbium oxide (about 1g) into 10ml of 50% trifluoroacetic acid aqueous solution, stir for more than 12 hours to dissolve;
[0127] 2) filtering and removing unreacted and dissolved oxide solid ytterbium oxide or erbium oxide to obtain a clear and transparent solution;
[0128] 3) The solution obtained in 2) is left to stand, and the solvent is slowly evaporated completely to obtain crystallized trifluoroacetate crystals;
[0129] 4) The crystalline product obtained in 3) is dried in a vacuum oven to obtain acetate of rare earth ions for future use.
[0130] Erbium-doped Yb 2 Mo 4 o 15 Preparation of nanocrystals
[0131] 1) 120mg (NH 4 ) 6 ·Mo 7 o 24 4H 2 O. 200mg ytterbium trifluoroacetate and 20mg erbium trifluoroacetate were dissolved in 10mL deionized water to obtain a clear aqueous solution;
[0132] 2) Add an approp...
Embodiment 2
[0147] Preparation of Ytterbium Trifluoroacetate and Holmium Trifluoroacetate
[0148] 1) Add an appropriate excess of ytterbium oxide (about 1g) or holmium oxide (about 1g) into 10ml of 25% trifluoroacetic acid aqueous solution, stir for more than 12 hours to dissolve;
[0149] 2) filtering and removing unreacted and dissolved oxide solid ytterbium oxide or holmium oxide to obtain a clear and transparent solution;
[0150] 3) The solution obtained in 2) is left to stand, and the solvent is slowly evaporated completely to obtain crystallized trifluoroacetate crystals;
[0151] 4) The crystalline product obtained in 3) is dried in a vacuum oven to obtain acetate of rare earth ions for future use.
[0152] Holmium doped Yb 2 Mo 4 o 15 Preparation of nanocrystals
[0153] 1) 120mg (NH 4 ) 6 ·Mo 7 o 24 4H 2 O, 200mg ytterbium trifluoroacetate and 20mg holmium trifluoroacetate were dissolved in 10mL deionized water to obtain a clear aqueous solution;
[0154] 2) Add an a...
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