Flower-like beta-NaYF4:Yb<3+>/Er<3+> hexagonal prism micron crystal luminescent material with adjustable red light and green light intensity

A technology of crystal luminescence and hexagonal prism, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of limiting the exploration and application of rare earth doping upconversion fluoride microcrystals, and achieve uniform and controllable size, unique morphology, The effect of simple implementation

Pending Publication Date: 2022-01-07
XIAN UNIV OF POSTS & TELECOMM
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Problems solved by technology

Although these rare earth ion-doped upconversion fluoride microcrystals obtained by the hydrothermal method have good fluorescence properties, they are especially regarded as the "optical window" of biological tissues in terms of fluorescence spectrum regulation --- red light Regulation is still an important problem to be solved, which severely limits the exploration and application of rare earth-doped upconversion fluoride microcrystals in the field of life sciences

Method used

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  • Flower-like beta-NaYF4:Yb&lt;3+&gt;/Er&lt;3+&gt; hexagonal prism micron crystal luminescent material with adjustable red light and green light intensity
  • Flower-like beta-NaYF4:Yb&lt;3+&gt;/Er&lt;3+&gt; hexagonal prism micron crystal luminescent material with adjustable red light and green light intensity
  • Flower-like beta-NaYF4:Yb&lt;3+&gt;/Er&lt;3+&gt; hexagonal prism micron crystal luminescent material with adjustable red light and green light intensity

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Embodiment 1

[0018] 1.17mL 0.2mol / L Y(NO 3 ) 3 Aqueous solution, 0.3mL 0.2mol / L Yb(NO 3 ) 3 aqueous solution and 0.03mL0.2mol / LEr(NO 3 ) 3 Add the aqueous solution into a beaker filled with 21mL of 0.02mol / L sodium citrate aqueous solution, and stir thoroughly for 30min. Then add 9 mL of 1mol / L sodium fluoride aqueous solution to the mixed solution, adjust the pH of the reaction solution to 10 with ammonia water, continue stirring for 40 min, pour all the reaction solution into a 40 mL polytetrafluoroethylene-lined autoclave, Tighten the lid of the autoclave and place it in an electric blast drying oven at 200°C for 24 hours. After the autoclave is cooled down, the reaction product is alternately centrifugally washed with deionized water and absolute ethanol, and dried at 60°C to obtain flower-shaped β-NaYF 4 :Yb 3+ / Er 3+ Hexagonal prism micro-crystals.

[0019] The flower-like β-NaYF prepared by X-ray diffractometer and scanning electron microscope 4 :Yb 3+ / Er 3+ The morphol...

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Abstract

The invention discloses a flower-like beta-NaYF4:Yb<3+>/Er<3+> hexagonal prism micron crystal luminescent material with adjustable red light and green light intensity, wherein the luminescent material is prepared in one step by using sodium fluoride as a fluorine source through a simple and rapid method, the morphology structure of the flower-like hexagonal prism micron crystal is similar to that of just blooming lily, the crystallinity is good, the dispersity is good, the size is uniform and controllable, and by changing the excitation power, the red light intensity and the green light intensity of the single flower-like beta-NaYF4:Yb<3+>/Er<3+> hexagonal prism micron crystal can be flexibly regulated and controlled. The flower-like beta-NaYF4:Yb<3+>/Er<3+> hexagonal prism micron crystal luminescent material is easily soluble in water, does not need to be modified, and has important application prospects in the fields of anti-counterfeiting, biological imaging, sensing and the like.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, in particular to a flower-shaped β-NaYF with adjustable intensity of red light and green light 4 :Yb 3+ / Er 3+ Hexagonal prism micro-crystal luminescent material. Background technique [0002] Rare earth ion-doped up-conversion luminescent materials have many advantages such as long fluorescence lifetime, sharp emission spectrum, high signal-to-noise ratio, large anti-Stokes shift, good photostability and low toxicity. , optical coding, solid-state lasers and sensing have important application prospects. Due to the special energy level structure and energy level distribution covering the entire spectral region of trivalent rare earth ions, the regulation of the fluorescence emission of rare earth ions has become the focus of great attention of researchers in many research fields. [0003] With the rapid development of nanotechnology, researchers have successfully prepared rare-e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85
CPCC09K11/7773
Inventor 韩庆艳朱仁昊董军高伟赵博超
Owner XIAN UNIV OF POSTS & TELECOMM
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