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Method for preparing rare-earth ytterbium-erbium-doped pyrochlore-phase nanofiber and application of nanofiber

A nanofiber, double-doping technology is applied in pharmaceutical formulations, medical preparations containing active ingredients, and inorganic raw material rayon, etc., to achieve the effects of good repeatability, meeting the requirements of mass production, and a simple and easy preparation method.

Active Publication Date: 2019-06-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far there is no 2 Ti 2 o 7 Research and report on the photothermal performance of the substrate by rare earth doping

Method used

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  • Method for preparing rare-earth ytterbium-erbium-doped pyrochlore-phase nanofiber and application of nanofiber
  • Method for preparing rare-earth ytterbium-erbium-doped pyrochlore-phase nanofiber and application of nanofiber
  • Method for preparing rare-earth ytterbium-erbium-doped pyrochlore-phase nanofiber and application of nanofiber

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preparation example Construction

[0037] A method for preparing rare earth ytterbium-erbium double-doped pyrochlore phase nanofibers of the present invention comprises the following steps:

[0038] S1, DMF and acetic acid are mixed and stirred according to the mass ratio of 1:(0.4~0.7), to obtain solution A;

[0039] S2. During continuous stirring, add tetrabutyl titanate with a mass ratio of 1:(3.8-4.5) to solution A to obtain solution B;

[0040] S3, mass ratio is 1:(4~20) ytterbium nitrate and erbium nitrate join in solution B and can obtain solution C in the constant stirring process, and the mass ratio of ytterbium nitrate and erbium nitrate and solution B is 1:(4~20) 4.7);

[0041] S4, adding bismuth nitrate with a mass ratio of 1: (15 to 34) to solution C during continuous stirring to obtain solution D;

[0042] S5. Add PVP with a mass fraction of 5-10% to the solution D and stir to form an electrospinning precursor solution;

[0043] S6. In the case of applying a 15-25 kV high-voltage power supply, ...

Embodiment 1

[0051] DMF and acetic acid are mixed according to the mass ratio of 0.4:1, form transparent solution by magnetic stirring; Then add the tetrabutyl titanate of 0.84ml and make it fully dissolve by stirring; Add the erbium nitrate of 0.031g and 0.106g of ytterbium nitrate; after it is fully dissolved, add 1.018g of bismuth nitrate and fully stir to dissolve it, and finally add PVP with a mass fraction of 5%, and obtain an electrospinning precursor solution after magnetic stirring.

[0052] Under the conditions of a control voltage of 15KV and a flow rate of 5 μl / m, a large amount of nanomaterials appeared on the collector. After the electrospinning was completed, the nanomaterials on the collector were transferred to the muffle furnace and heated at 2°C / min. Raise the rate to 700°C for 1 hour to obtain pyrochlore phase Bi with high crystallinity 2 Ti 2 o 7 : Yb 3+ , Er 3+ nanomaterials.

[0053] figure 1 Given the obtained Bi 2 Ti 2 o 7 : Yb 3+ ,Er 3+ Scanning electro...

Embodiment 2

[0055] DMF and acetic acid are mixed according to the mass ratio of 0.4:1, form transparent solution by magnetic stirring; Then add the tetrabutyl titanate of 0.85ml and make it fully dissolved by stirring; Add 0.015g of erbium nitrate and 0.182g of ytterbium nitrate; after it is fully dissolved, add 1.018g of bismuth nitrate and fully stir to dissolve it, and finally add PVP with a mass fraction of 6%, and obtain an electrospinning precursor solution after magnetic stirring.

[0056] Under the conditions of a control voltage of 17KV and a flow rate of 8μl / m, a large amount of nanomaterials appeared on the collector. After the electrospinning was completed, the nanomaterials on the collector were transferred to the muffle furnace and heated at 6°C / min. Raise the rate to 700°C for 1.5 hours to obtain pyrochlore phase Bi with high crystallinity 2 Ti 2 o 7 : Yb 3+ ,Er 3+ nanomaterials.

[0057] figure 2 The photothermal effect performance diagram obtained when the near-inf...

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Abstract

The invention discloses a method for preparing a rare-earth ytterbium-erbium-doped pyrochlore-phase nanofiber and application of the nanofiber. The method comprises the following steps of taking dimethyl formamide as a solvent, adding polyvinylpyrrolidone, forming a Taylor cone through liquid drops under the action of an electrostatic field, preparing a one-dimensional nano material by means of anelectrostatic spinning approach under the action of liquid surface tension and the electric field, and removing organic matter in the processes of heating, heat preservation and cooling to prepare the cubic pyrochlore-phase one-dimensional nano material. The one-dimensional nanofiber has high dispersibility in water and a great photothermal effect under the irradiation of near-infrared light. Thepreparation method is simple, feasible and high in repeatability and can meet the requirement of batch production. A related photo-thermal material matrix is an oxide which is high in chemical stability, free of toxin and low in price and is easily dispersed in water, and the demands of photo-thermal therapy and industrial production can be met. The prepared one-dimensional pure pyrochlore-phasenano material is expected to play an important role in the treatment field of major diseases such as cancers and tumors.

Description

technical field [0001] The invention belongs to rare earth ternary Bi 2 Ti 2 o 7 :Yb 3+ ,Er 3+ The technical field of compound one-dimensional nanomaterial preparation, specifically relates to a rare earth ytterbium erbium double-doped pyrochlore phase nanofiber preparation method and its application. Background technique [0002] According to investigations and studies, cancer has become one of the major diseases that threaten human health. With the advancement and development of science and technology, people's living environment has changed, and about 10,000 people in the country suffer from cancer every day. At the same time, traditional treatment methods such as chemotherapy methods, patients suffer greatly. Therefore, it is imminent to explore new cancer treatment methods. Photothermal therapy has attracted widespread attention as a new type of cancer treatment. That is, the combination of photothermal materials and traditionally used chemical drugs can signific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08A61K41/00A61P35/00
Inventor 葛万银徐美美施金豆焦思怡常哲
Owner SHAANXI UNIV OF SCI & TECH
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