Preparation method and application of up-conversion material NaYF4:Yb,Er@M

A technology for converting materials and metals, which is applied in nanotechnology, luminescent materials, nanotechnology, etc. for materials and surface science. Low efficiency and other problems, to achieve the effect of easy large-scale production, increased radiation attenuation rate, and low cost

Inactive Publication Date: 2019-05-03
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing up-conversion composite materials have a series of problems in the preparation steps, such as cumbersome, poor stability, and low catalytic degradation efficiency.
For example, Guo Cong et al. 4 :Yb 3+ / Er 3+ The influence of the luminescent properties of upconversion luminescent materials[J]. Synthetic Crystallographic Journal, 2016, 45(02):460-464.) Although the sol method reported can prepare Ag / NaYF 4 : Yb, Er, but there are the following problems: the particle size of Ag is difficult to control well; it is difficult to control the loading amount of Ag

Method used

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  • Preparation method and application of up-conversion material NaYF4:Yb,Er@M
  • Preparation method and application of up-conversion material NaYF4:Yb,Er@M
  • Preparation method and application of up-conversion material NaYF4:Yb,Er@M

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Embodiment 1

[0040] A NaYF 4 : The preparation method of Yb,Er@Ag upconversion material, comprising the following steps:

[0041] (1) NaYF 4 :Yb,Er nanoparticles were sonicated for 20min, dispersed in AgNO 3 The solution was made into 0.1mg / mL solution, aged for 15h, when NaYF 4 : Ag is fully adsorbed on the surface of Yb,Er nanoparticles + Then, the precursor was obtained by centrifugation, and the precursor was rinsed twice with deionized water;

[0042] (2) Disperse the precursor rinsed in step (1) in 3 mL of NaBH with a concentration of 5 mg / mL 4 In the solution, stir for 8 min to facilitate the Ag + Fully reduced to Ag particles, after completion, the reaction solution is centrifuged to obtain a solid product;

[0043] (3) After rinsing the solid product obtained in step (2) with deionized water for 4 times, it was dried at 70° C. for 4 hours to obtain NaYF 4 : Yb,Er@Ag upconversion material.

Embodiment 2

[0045] A NaYF 4 : The preparation method of Yb,Er@Au upconversion material, comprising the following steps:

[0046] (1) NaYF 4 :Yb,Er nanoparticles were sonicated for 100min, dispersed in HAuCl 4 The solution was made into 0.1mg / mL solution, aged for 24h, when NaYF 4 : After the surface of Yb, Er nanoparticles fully adsorbed Au(III), the precursor was obtained by centrifugation, and the precursor was rinsed with deionized water for 3 times;

[0047] (2) Disperse the precursor rinsed in step (1) in 5 mL of sodium citrate solution with a concentration of 8 mg / mL, stir for 8 min, so as to fully reduce Au(III) into Au particles, and centrifuge the reaction solution after completion separation to obtain a solid product;

[0048] (3) After rinsing the solid product obtained in step (2) with deionized water for 5 times, it was dried at 60° C. for 6 hours to obtain NaYF 4 : Yb,Er@Au upconversion material.

Embodiment 3

[0050] A NaYF 4 : The preparation method of Yb,Er@Ag upconversion material, comprising the following steps:

[0051] (1) NaYF 4 :Yb,Er nanoparticles were sonicated for 1min, dispersed in AgNO 3 The solution was made into 1mg / mL solution, aged for 1h, when NaYF 4 : Ag is fully adsorbed on the surface of Yb,Er nanoparticles + Then, the precursor was obtained by centrifugation, and the precursor was rinsed twice with deionized water;

[0052] (2) Disperse the precursor rinsed in step (1) in 5 mL of ethylene glycol solution with a concentration of 5 mg / mL, and stir for 5 min, so as to facilitate the removal of Ag + Fully reduced to Ag particles, after completion, the reaction solution is centrifuged to obtain a solid product;

[0053] (3) After rinsing the solid product obtained in step (2) with deionized water for 4 times, it was dried at 80° C. for 2 hours to obtain NaYF 4 : Yb,Er@Ag upconversion material.

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Abstract

The invention belongs to the technical field of up-conversion nano-composite materials, and especially relates to a preparation method and an application of an up-conversion material NaYF4:Yb,Er@M. The preparation method includes the following steps: (1) dispersing an up-conversion nano-material NaYF4:Yb,Er in a solution containing metal M ions, performing aging for 1-24 h to make the surface of the up-conversion material NaYF4:Yb,Er fully absorbs the metal M ions, and centrifuging the obtained solution to obtain a precursor; and (2) placing the precursor obtained in step (1) in a reducing agent, reducing the metal M ions into metal M, and separating the NaYF4:Yb,Er@M up-conversion material after the completion of the reduction in order to obtain the up-conversion material NaYF4:Yb,Er@M. Metal particles are attached in situ onto the surface of NaYF4:Yb,Er, and are very uniformly distributed to form the ideal up-conversion composite material, so that the fluorescence performance of theup-conversion material is significantly enhanced.

Description

technical field [0001] The invention belongs to the technical field of surface modification of up-conversion nano-composite materials, and in particular relates to a NaYF 4 : Yb,Er modified metal on the preparation of upconversion materials. Background technique [0002] Rare earth-modified nano-upconversion materials can convert infrared radiation into visible light through a multi-photon absorption process, with little light damage to organisms, weak background fluorescence, and a deep detection range, so they are widely used in lasers, infrared quantum counters, temperature sensors, solar cells, three-dimensional Display, anti-counterfeiting technology, biological macromolecular detection, medical imaging and other fields have potential application prospects. But this material usually has a low emission efficiency. Plasmon resonance can be generated at the surface by modifying the noble metal on the surface of the upconversion material, thereby enhancing the emission ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85B82Y20/00B82Y30/00
Inventor 李志华李娜郄元元曹国炜张敏罗楠楠
Owner SHANDONG NORMAL UNIV
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