Preparation method of cubic pyrochlore phase nanofiber based on electrospinning method and application thereof

A technology of cubic pyrochlore and electrospinning, which is applied in the preparation of spinning solutions, rayon of inorganic raw materials, etc., to achieve the effects of good repeatability, simplifying the double-doping or multi-doping process, and meeting the requirements of mass production

Active Publication Date: 2019-02-22
深圳万知达科技有限公司
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Problems solved by technology

But so far there is no 2 Ti 2 o 7 A report on the study of the upcon

Method used

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  • Preparation method of cubic pyrochlore phase nanofiber based on electrospinning method and application thereof
  • Preparation method of cubic pyrochlore phase nanofiber based on electrospinning method and application thereof
  • Preparation method of cubic pyrochlore phase nanofiber based on electrospinning method and application thereof

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preparation example Construction

[0036] A method for preparing cubic pyrochlore phase nanofibers based on an electrospinning method of the present invention comprises the following steps:

[0037] S1, DMF and acetic acid are mixed and stirred according to the mass ratio of 1:(0.3~0.6), to obtain solution A;

[0038] S2. During continuous stirring, tetrabutyl titanate with a mass ratio of 1: (1.5-2) to solution A is added to solution A to obtain solution B;

[0039] S3, adding erbium nitrate with solution B in a mass ratio of 1: (14 to 32) into solution B to obtain solution C in the process of constant stirring;

[0040] S4, adding bismuth nitrate with a mass ratio of 1: (15 to 34) to solution C during continuous stirring to obtain solution D;

[0041] S5. Add 5-10% (mass fraction) of PVP to the solution C and stir to form an electrospinning precursor solution;

[0042] S6. In the case of applying a high-voltage power supply of 18-25 kV, spray the precursor liquid onto the collector through a micro-flow prec...

Embodiment 1

[0049] DMF and acetic acid were mixed in a mass ratio of 0.3:1, and a transparent solution was formed by magnetic stirring; then 0.8ml of tetrabutyl titanate was added and fully dissolved by stirring; 0.11g of erbium nitrate was added under rapid stirring; After it was fully dissolved, 1.05 g of bismuth nitrate was added and fully stirred to dissolve it, and finally PVP with a mass fraction of 5% was added, and an electrospinning precursor was obtained after magnetic stirring. Under the control voltage of 18KV and the flow rate of 10μl / 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 4°C / min. If the rate is increased to 600°C for 1 hour, the pyrochlore phase Bi with high crystallization performance can be obtained. 2 Ti 2 o 7 : Er nanomaterials.

[0050] figure 1 gives the obtained Er 2 Ti 2 o 7 The scanning electron micrograph (S...

Embodiment 2

[0052] DMF and acetic acid were mixed in a mass ratio of 0.4:1, and a transparent solution was formed by magnetic stirring; then 0.81ml of tetrabutyl titanate was added and fully dissolved by stirring; 0.13g of erbium nitrate was added under rapid stirring; After it was fully dissolved, 1.02 g of bismuth nitrate was added and fully stirred to dissolve it, and finally PVP with a mass fraction of 6% was added, and the electrospinning precursor was obtained after magnetic stirring. Under the conditions of control voltage of 20KV and flow rate of 12μl / 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. Increase the rate to 650°C for 1.5 hours to obtain pyrochlore phase Bi with high crystallinity 2 Ti 2 o 7 : Er nanomaterials.

[0053] figure 2 Given the laser with a wavelength of 980nm as the excitation source, the obtained up-con...

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Abstract

The invention discloses a preparation method of cubic pyrochlore phase nanofiber based on an electrospinning method and application. The method includes using dimethylformamide as a solvent, adding anappropriate amount of polyvinylpyrrolidone to form a Taylor cone in an electrostatic field by dropping, preparing a one-dimensional nano material by the electrospinning method under the action of liquid surface tension and the electric field, and removing organic matter residues by heating, heat preservation and cooling to obtain the cubic pyrochlore phase one-dimensional nano material. The doping process of other rare earth ions and the traditional double doping or multi-doping processes are avoided, and the preparation method is simple and practicable, good in repeatability and capable of meeting the batch production requirements. A green up-converting luminescent substrate involved is an oxide with good chemical stability, non-toxic, inexpensive and prone to meet industrial productionrequirements. The prepared one-dimensional pure pyrochlore phase nano material is expected to play an important role in the fields of display, anti-counterfeiting, biological detection, infrared sensors, solar photovoltaic devices and the like.

Description

technical field [0001] The invention belongs to rare earth ternary Bi 2 Ti 2 o 7 : The field of Er compound one-dimensional nanomaterial preparation and luminescent technology, specifically relates to a preparation method and application of cubic pyrochlore phase nanofibers based on electrospinning method. Background technique [0002] Up-conversion luminescent material is a new type of optical functional material that can convert infrared light invisible to the naked eye into visible light, also known as multi-photon material. It has very important application value in the fields of anti-counterfeiting, display, biological detection, imaging, and photothermal treatment of diseases. At present, the main up-conversion luminescent materials can be divided into rare earth fluorides (NaYF 4 etc.), rare earth oxyhalides (represented by YOCl 3 etc.), rare earth sulfur oxides (with La 2 o 2 S, Y 2 o 2 S, etc.), rare earth oxides and composite oxides (represented by Y 2 o ...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01D1/02
CPCD01D1/02D01F9/08
Inventor 葛万银徐美美焦思怡常哲
Owner 深圳万知达科技有限公司
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