Rare earth oxyfluoride nanomaterial and its preparation method and application
A technology of oxyfluoride and nanomaterials, applied in the field of rare earth oxyfluoride nanomaterials and its preparation, can solve the problems of heterogeneous phases, narrow variable range, and easy occurrence of fluoride, etc., and the conditions are easy to control, uniform and repeatable Good performance and good repeatability
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Embodiment 1
[0062] Preparation of Rare Earth Oxyfluoride Nanomaterials by High Temperature Solvothermal Decomposition Using Rare Earth Trifluoroacetate and Ammonium Acetate as Precursors:
[0063] (1) Preparation of oil-soluble LaOF: 5% Eu nanocrystals
[0064] Weigh 0.5054 g of lanthanum trifluoroacetate, 0.0273 g of europium trifluoroacetate, and 0.1156 g of ammonium acetate into a three-hole flask at room temperature, and add 5 mL of oleic acid, 9 mL of oleylamine and 2 mL of octadecene as solvents. Heated under an inert atmosphere until the above-mentioned trifluoroacetate and ammonium acetate were dissolved, then continued to heat up to 310°C, reacted for 2 hours, cooled naturally to room temperature, precipitated and washed to obtain oil-soluble LaOF:5%Eu nanocrystals.
[0065] From figure 1 In a), it can be seen that the oil-soluble nanocrystal has good crystallinity, and its diffraction peak position and relative intensity are consistent with the PDF standard card of LaOF (JCPDS ...
Embodiment 2
[0094] Based on dissolution-enhanced time-resolved fluorescent immunoassay method, using Lu 6 o 5 f 8 :Eu Nanoprobes for Prostate Specific Antigen Detection
[0095] 1) Preparation of oil-soluble Lu 6 o 5 f 8 :40% Eu Nanocrystalline
[0096] Weigh 0.3408g lutetium trifluoroacetate, 0.2180g europium trifluoroacetate, and 0.0812g ammonium acetate into a three-hole flask at room temperature, add 5mL oleic acid and 9mL oleylamine as solvents; After dissolving with ammonium acetate, continue to heat up to 320°C, react for 2 hours, cool to room temperature naturally, precipitate and wash to obtain oil-soluble Lu 6 o 5 f 8 : 40% Eu nanocrystals.
[0097] Among them, the oil-soluble Lu 6 o 5 f 8 : The powder diffraction pattern and transmission electron microscope image of 40% Eu nanocrystals are shown in Figure 6 a) and Figure 6 b) as shown.
[0098] 2) Preparation of water-soluble Lu 6 o 5 f 8 :40% Eu Nanocrystalline
[0099] Weigh 30 mg of the oil-soluble Lu pr...
Embodiment 3
[0114] Lu 6 o 5 f 8 : Application performance test of Yb / Er nanocrystals
[0115] (1) Preparation of oil-soluble Lu 6 o 5 f 8 :20%Yb / 2%Er nanocrystalline
[0116] Weigh 0.4431g of lutetium trifluoroacetate, 0.1132g of ytterbium trifluoroacetate, 0.0112g of erbium trifluoroacetate, and 0.0812g of ammonium acetate into a three-hole flask at room temperature, add 5mL of oleic acid and 9mL of oleylamine as solvents; heat to After dissolving the above trifluoroacetic acid salt and ammonium acetate, continue to heat up to 320°C, react for 2 hours, cool to room temperature naturally, precipitate and wash to obtain oil-soluble Lu 6 o 5 f 8 : 20%Yb / 2%Er nanocrystals.
[0117] Figure 8 a) and 8b) for Lu 6 o 5 f 8 : Powder diffraction pattern and transmission electron microscope pattern of 20%Yb / 2%Er nanocrystals.
[0118] Such as Figure 9 As shown, under the excitation of 980nm near-infrared light, the material exhibits typical green (520-570nm) and red (640-670nm) up-c...
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