MXene nanosheet loaded rare earth luminescent nanocrystalline composite material, preparation method and application

A technology of rare earth luminescence and composite materials, which is applied in the field of nano-biomedical materials, can solve problems such as poor compatibility, poor bonding, and unstable morphology, and achieve good compatibility, simple process, and good optical stability.

Pending Publication Date: 2021-06-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and to provide a composite material and preparation method of two-dimensional MXene nanosheets loaded with rare earth luminescent nanocrystals, through synchronous improvement of material components and preparation processes, to overcome nano Problems of poor compatibility, poor bonding and unstable morphology between different components of the material

Method used

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  • MXene nanosheet loaded rare earth luminescent nanocrystalline composite material, preparation method and application
  • MXene nanosheet loaded rare earth luminescent nanocrystalline composite material, preparation method and application
  • MXene nanosheet loaded rare earth luminescent nanocrystalline composite material, preparation method and application

Examples

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specific Embodiment 1

[0041] The composite material of MXene nanosheets loaded with rare earth luminescent nanocrystals provided in this example is specifically two-dimensional Nb 2 C nanosheets loaded with NaYF 4 :Yb,Er@NaGdF 4 The composite material, its preparation method, comprises the following steps:

[0042] (1) Take 5 mL of NaYF with a concentration of 4 mg / mL 4 :Yb,Er@NaGdF 4 Cyclohexane solution, add 20mL deionized water, adjust the pH to 4 with 1M hydrochloric acid, stir vigorously at room temperature for 2 hours to remove the surface oleic acid ligand, and then wash it with a mixed solution of absolute ethanol and water with a volume ratio of 2:1 , 20,000 rpm, high-speed centrifugation three times for 10 minutes to obtain water-soluble rare earth luminescent nanocrystals without surface ligands, and then re-dispersed into 5mL of absolute ethanol;

[0043] (2) Prepare 5mg two-dimensional Nb 2 C nanosheets, dispersed in 5mL absolute ethanol solution and placed in a closed glass bottl...

specific Embodiment 2

[0048] The composite material of the MXene nanosheets loaded with rare earth luminescent nanocrystals provided in this example is specifically two-dimensional Nb 2 C nanosheets loaded with NaYF 4 :Yb,Tm@NaGdF 4 The composite material, its preparation method comprises the following steps:

[0049] (1) Take 5 mL of NaYF with a concentration of 6 mg / mL 4 :Yb,Tm@NaGdF 4 Cyclohexane solution, add 20mL deionized water, adjust the pH to 2 with 1M hydrochloric acid, stir vigorously at room temperature for 3 hours to remove the surface oleic acid ligand, and then wash it with a mixed solution of absolute ethanol and water with a volume ratio of 2:1 , 20,000 rpm, high-speed centrifugation three times for 10 minutes to obtain water-soluble rare earth luminescent nanocrystals without surface ligands, and then re-dispersed into 5mL of absolute ethanol;

[0050] (2) Prepare 7mg two-dimensional Nb 2 C nanosheets, dispersed in 5mL of absolute ethanol solution and placed in a closed glass...

specific Embodiment 3

[0054] The composite material of MXene nanosheets loaded with rare earth luminescent nanocrystals provided in this example is specifically two-dimensional Ti 3 C 2 Nanosheet loaded with NaYF 4 :Yb,Er@NaGdF 4 The composite material, its preparation method comprises the following steps:

[0055] (1) Take 4 mL of NaYF with a concentration of 4 mg / mL 4 :Yb,Er@NaGdF 4 Cyclohexane solution, add 16mL deionized water, adjust the pH to 4 with 1M hydrochloric acid, stir vigorously at room temperature for 4 hours to remove the surface oleic acid ligand, and then wash it with a mixed solution of absolute ethanol and water with a volume ratio of 2:1 , 20,000 rpm, high-speed centrifugation three times for 10 minutes to obtain water-soluble rare earth up-conversion luminescent nanocrystals without surface ligands, and then re-dispersed into 4 mL of absolute ethanol;

[0056] (2) Prepare 6mg of two-dimensional Ti 3 C 2 Nanosheets were dispersed in 6mL of absolute ethanol solution and p...

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Abstract

The invention discloses an MXene nanosheet loaded rare earth luminescent nanocrystalline composite material, which is a water-soluble nanosheet composite material formed by compounding a two-dimensional MXene nanosheet with negative electricity on the surface and a rare earth luminescent nanocrystalline without a surface ligand and with positive electricity through electrostatic adsorption and further modifying the two-dimensional MXene nanosheet and the rare earth luminescent nanocrystalline. The invention also discloses a preparation method and application of the composite material. The preparation method comprises the following steps: loading rare earth luminescent nanocrystals with positive charges on the surfaces of electronegative two-dimensional MXene nanosheets, and then carrying out surface modification to obtain the water-soluble two-dimensional MXene nanosheet loaded rare earth luminescent nanocrystal composite material. The material has the advantages of being good in biocompatibility, good in photothermal conversion performance and photothermal stability, strong in biological tissue photothermal ablation capacity and the like, and the preparation method is simple and high in repetition rate. The material has good fluorescence property and magnetic resonance imaging capability, and can be applied to fluorescence and magnetic resonance imaging dual-mode imaging in a living body.

Description

technical field [0001] The invention relates to the technical field of nano biomedical materials, in particular to a composite material, preparation method and application of two-dimensional MXene nanosheets loaded with rare earth luminescent nanocrystals. Background technique [0002] At present, two-dimensional transition metal carbides (MXene) have attracted extensive attention due to their graphene-like lamellar structure, which combines the properties of ceramics and metals, exhibiting high strength, corrosion resistance, and thermal stability, At the same time, it has good electrical conductivity, flexibility and optical properties, and the abundant active sites provided by its huge specific surface area also make it exhibit excellent catalytic activity. Therefore, it has wide applications in catalysis, electronics, energy storage, and biology. The strong optical absorption properties and efficient photothermal conversion ability of MXene are often used as phototherma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85A61K41/00A61K49/00A61K49/08A61K49/18A61P35/00
CPCC09K11/7705A61K41/0052A61K49/0019A61K49/005A61K49/0067A61K49/08A61K49/18A61P35/00
Inventor 孙丽宁孙松强陈雨王卓
Owner SHANGHAI UNIV
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