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Preparation method of Al<3+> doped hexagonal phase NaYF4:Yb, Er upconversion material

A conversion material and hexagonal phase technology, applied in the field of preparation of hexagonal phase NaYF4:Yb, Er up-conversion materials, can solve the problems of high purity and small size, etc., to achieve increased up-conversion fluorescence intensity, high fluorescence intensity, The effect of important economic benefits

Inactive Publication Date: 2019-07-26
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention aims to propose an Al 3+ doped hexagonal NaYF 4 : The preparation method of Yb, Er up-conversion material, in order to solve the existing hexagonal phase NaYF 4 The problem of not being able to combine high purity and small size

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  • Preparation method of Al&lt;3+&gt; doped hexagonal phase NaYF4:Yb, Er upconversion material
  • Preparation method of Al&lt;3+&gt; doped hexagonal phase NaYF4:Yb, Er upconversion material
  • Preparation method of Al&lt;3+&gt; doped hexagonal phase NaYF4:Yb, Er upconversion material

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Embodiment 1

[0029] a kind of Al 3+ doped hexagonal NaYF 4 : Yb, the preparation method of Er up-conversion material, specifically comprises the following steps:

[0030] 1) According to the molar ratio of 2: 0.78: 0.2: 0.02: 0.05, the trifluoroacetate solution of Na, Y, Yb, Er, Al was added into a three-necked flask and mixed to obtain a mixed solution A;

[0031] 2) Stir and evaporate the mixed solution A to dryness at 80°C to remove moisture, then continue to add a mixed solvent consisting of 3mL oleic acid and 9mL octadecene to the above-mentioned three-necked flask, stir and vacuumize at 100°C to Dewatering and deoxygenation to obtain reaction solution B;

[0032] 3) Argon gas was slowly introduced into the reaction solution B of the three-necked flask, and then, the temperature was raised to 300° C. at a heating rate of 10° C. / min, and the reaction was kept for 50 minutes to obtain a yellow colloidal solution C;

[0033] 4) Cool the colloidal solution C naturally, then, use absolu...

Embodiment 2

[0035] a kind of Al 3+ doped hexagonal NaYF 4 : Yb, the preparation method of Er up-conversion material, specifically comprises the following steps:

[0036] 1) According to the molar ratio of 2: 0.78: 0.2: 0.02: 0.01, the trifluoroacetate solution of Na, Y, Yb, Er, Al was added into a three-necked flask and mixed to obtain a mixed solution A;

[0037] 2) Stir and evaporate the mixed solution A to dryness at 80°C to remove moisture, then continue to add a mixed solvent consisting of 3mL oleic acid and 9mL octadecene to the above-mentioned three-necked flask, stir and vacuumize at 100°C to Dewatering and deoxygenation to obtain reaction solution B;

[0038] 3) Argon gas was slowly introduced into the reaction solution B of the three-necked flask, and then, the temperature was raised to 300° C. at a heating rate of 10° C. / min, and the reaction was kept for 50 minutes to obtain a yellow colloidal solution C;

[0039] 4) Cool the colloidal solution C naturally, then, use absolu...

Embodiment 3

[0041] a kind of Al 3+ doped hexagonal NaYF 4 : Yb, the preparation method of Er up-conversion material, specifically comprises the following steps:

[0042] 1) According to the molar ratio of 2: 0.78: 0.2: 0.02: 0.15, the trifluoroacetate solution of Na, Y, Yb, Er, Al was added into a three-necked flask and mixed to obtain a mixed solution A;

[0043]2) Stir and evaporate the mixed solution A to dryness at 80°C to remove moisture, then continue to add a mixed solvent consisting of 3mL oleic acid and 9mL octadecene to the above-mentioned three-necked flask, stir and vacuumize at 100°C to Dewatering and deoxygenation to obtain reaction solution B;

[0044] 3) Argon gas was slowly introduced into the reaction solution B of the three-necked flask, and then, the temperature was raised to 300° C. at a heating rate of 10° C. / min, and the reaction was kept for 50 minutes to obtain a yellow colloidal solution C;

[0045] 4) Cool the colloidal solution C naturally, then, use absolut...

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Abstract

The invention provides a preparation method of a Al<3+> doped hexagonal phase NaYF4:Yb, Er upconversion material. The preparation method has the advantages that small-radius Al<3+> is introduced intoa NaYF4:Yb, Er crystal lattice through a trifluoroacetate high-temperature thermal decomposition method to allow NaYF4 to have evident lattice distortion, the ability of NaYF4 converting from alpha phase (cubic phase) to beta phase (hexagonal phase) is increased, and accordingly the purity of the hexagonal phase NaYF4 upconversion material is increased, and the upconversion fluorescence intensityof the hexagonal phase NaYF4 upconversion material is increased; in addition, the doping of the Al<3+> can favorably lower the symmetry of the local crystal field of activating agent Er<3+>, f-f forbidden transition can be destroyed to increase the probability of radiative transition, reaction time can be shortened, and accordingly the small-size hexagonal phase NaYF4:Yb, Er upconversion materialcan be synthesized favorably, the upconversion fluorescence intensity of the NaYF4:Yb, Er upconversion material is further enhanced, and the actual application of the NaYF4:Yb, Er upconversion material in the field of biomarkers.

Description

technical field [0001] The invention relates to the technical field of up-conversion luminescent materials, in particular to an Al 3+ doped hexagonal NaYF 4 : Preparation method of Yb, Er up-conversion material. Background technique [0002] Rare earth up-conversion fluorescent materials have the advantages of high chemical stability, good photostability, low toxicity, narrow emission band, and long luminescence lifetime. Compared with down-conversion fluorescent labeling materials such as traditional fluorescent dyes and quantum dots, rare-earth up-conversion fluorescent materials can emit visible light by using near-infrared light, and near-infrared light has a deeper light penetration depth in biological tissues, which is harmful to biological With the advantages of almost no tissue damage and no background fluorescence, it is expected to become the next generation of biomarker materials. In particular, the hexagonal NaYF 4 It is one of the host materials with the hig...

Claims

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Application Information

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IPC IPC(8): C09K11/85B82Y20/00B82Y30/00
CPCB82Y20/00B82Y30/00C09K11/7773
Inventor 王友法周月霞陈静
Owner WUHAN UNIV OF TECH
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