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Preparation method and application of rare earth ytterbium holmium double-doped pyrochlore phase nanofiber

A nanofiber, double-doping technology is applied in the direction of inorganic raw material rayon, etc., to meet the requirements of mass production, good repeatability, and simple and easy preparation method.

Active Publication Date: 2022-02-01
SHAANXI UNIV OF SCI & TECH
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  • Description
  • Claims
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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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  • Preparation method and application of rare earth ytterbium holmium double-doped pyrochlore phase nanofiber
  • Preparation method and application of rare earth ytterbium holmium double-doped pyrochlore phase nanofiber
  • Preparation method and application of rare earth ytterbium holmium double-doped pyrochlore phase nanofiber

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preparation example Construction

[0033] A method for preparing rare earth ytterbium holmium double-doped pyrochlore phase nanofibers of the present invention comprises the following steps:

[0034] S1, DMF and acetic acid are mixed and stirred according to the mass ratio of 1:(0.2~0.8), to obtain solution A;

[0035] S2. In the process of continuous stirring, tetrabutyl titanate with a mass ratio of 1: (3-5) to solution A is added to solution A to obtain solution B;

[0036] S3, adding ytterbium nitrate and holmium nitrate with a mass ratio of 1: (3 to 18) in solution B to obtain solution C during continuous stirring, the mass ratio of solution B to the sum of ytterbium nitrate and holmium nitrate is (3.8 to 5.2 ):1;

[0037] S4, adding bismuth nitrate with a mass ratio of 1: (5.5 to 6.5) to solution C in the process of continuous stirring to obtain solution D;

[0038] S5. Add PVP with a mass fraction of 4-8% to the solution C and stir to prepare an electrospinning precursor solution;

[0039] S6. In the ...

Embodiment 1

[0049] DMF and acetic acid were mixed according to a mass ratio of 1:0.2, and a transparent solution was formed by magnetic stirring; then 0.9ml of tetrabutyl titanate was added and fully dissolved by stirring; 0.027g of holmium nitrate and 0.112g 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 4%, and obtain an electrospinning precursor solution after magnetic stirring.

[0050] Under the conditions of control voltage of 15KV and flow rate of 3μl / 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 3°C / min. If the rate is increased to 600°C for 2 hours, the pyrochlore phase Bi with high crystallization performance can be obtained. 2 Ti 2 o 7 : Yb 3+ ,Ho 3+ nanomaterials.

[0051] figure 1 Given the obtained Bi 2 Ti 2 o 7 : Yb...

Embodiment 2

[0053] DMF and acetic acid were mixed according to a mass ratio of 1:0.4, and a transparent solution was formed by magnetic stirring; then 1.0ml of tetrabutyl titanate was added and fully dissolved by stirring; 0.019g of holmium nitrate and 0.12g 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.

[0054] Under the conditions of control voltage of 15KV and flow rate of 7μl / 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 3°C / min. If the rate is increased to 650°C for 2 hours, the pyrochlore phase Bi with high crystallization performance can be obtained. 2 Ti 2 o 7 : Yb 3+ ,Ho 3+ nanomaterials.

[0055] figure 2 Given that the laser with a wavelength o...

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Abstract

The invention discloses a method for preparing rare earth ytterbium holmium double-doped pyrochlore phase nanofibers and its application. Using dimethylformamide as a solvent and adding polyvinylpyrrolidone, the droplets form Taylor cones under an electrostatic field, and on the surface of the liquid One-dimensional nanomaterials are prepared by electrospinning under the force of tension and electric field, and then the organic matter is removed through the process of heating, heat preservation and cooling, and cubic pyrochlore phase one-dimensional nanomaterials are prepared. One-dimensional nanofibers have good dispersibility in water, and have good upconversion performance and photothermal effect under near-infrared light irradiation. The preparation method is simple and easy, has good repeatability, and can meet the requirements of mass production. The matrix of the up-conversion photothermal material involved is an oxide, which has good chemical stability, is non-toxic, is cheap and is easily dispersed in water, and can meet the requirements of photothermal treatment and industrial production. It is expected to play an important role in the treatment of major diseases such as cancer and tumors.

Description

technical field [0001] The invention belongs to rare earth ternary Bi 2 Ti 2 o 7 :Yb 3+ ,Ho 3+ The technical field of compound one-dimensional nanomaterial preparation, specifically relates to a rare earth ytterbium holmium double-doped pyrochlore phase nanofiber preparation method and its application. Background technique [0002] Malignant tumors have become a disease with a relatively high mortality rate in the world, seriously threatening people's health. With the advancement and development of science and technology, although there have been breakthroughs in the diagnosis and treatment of tumors, the early diagnosis techniques are low, and the treatment methods mainly include radiotherapy, chemotherapy and surgery. Its toxic side effect is big, brings great misery to patient's body and mind. Therefore, the majority of researchers are also actively exploring new means of cancer diagnosis and treatment. [0003] Photothermal therapy is a new type of cancer treatmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08
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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