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Method for preparing europium and fluorine-doped yttrium oxide nanofibres

A technology of europium yttrium oxyfluoride and nanofibers, applied in the field of nanomaterial preparation

Inactive Publication Date: 2011-05-04
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

No YOF:Eu seen yet 3+ report on nanofibers

Method used

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  • Method for preparing europium and fluorine-doped yttrium oxide nanofibres
  • Method for preparing europium and fluorine-doped yttrium oxide nanofibres
  • Method for preparing europium and fluorine-doped yttrium oxide nanofibres

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Embodiment

[0021] Embodiment: take by weighing 1g Y 2 o 3 and 0.0820g Eu 2 o 3 , the molar ratio of the two is 19:1, that is, the molar percentage of europium ions is 5%, evaporated after dissolving with dilute nitric acid, and obtains Y(NO 3 ) 3 and Eu(NO 3 ) 3 Mix the crystals, add 14.7573g of DMF solvent, and then add 3g of PVP to the above solution, magnetically stir at room temperature for 4h, and let stand for 2h to form a spinning solution. The mass percentages of the components of the spinning solution are as follows: 9% of rare earth nitrate, 10% of PVP, and 81% of solvent DMF. Add the prepared spinning solution into the liquid storage tube of the spinning device for electrospinning, the nozzle diameter is 0.7mm, the angle between the nozzle and the horizontal plane is adjusted to 15°, a DC voltage of 14kV is applied, the curing distance is 20cm, and the room temperature is 23 ℃, relative humidity is 50%~60%, get PVP / [Y(NO 3 ) 3 +Eu(NO 3 ) 3 ] Composite nanofibers. T...

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Abstract

The invention relates to a method for preparing europium and fluorine-doped yttrium oxide nanofibres, belonging to the technical field of preparing nano materials. The prior art is used for preparing rare earth fluorides / rare earth oxyfluoride composite nanofibres. The method provided by the invention comprises the three following steps: (1) preparation of Y2O3:5%Eu<3+> nanofibres: adopting an electrostatic spinning technology to prepare PVP / [Y(NO3)3+Eu(NO3)3] composite nanofibres, and then carrying out heat treatment to obtain the Y2O3:5% Eu<3+> nanofibres; (2) preparation of YF3:5%Eu<3+> nanofibres: using a double-crucible process to carry out fluoridation on the Y2O3:5%Eu<3+> nanofibres to obtain the YF3:5%Eu<3+> nanofibres by taking ammonium bifluoride as a fluorination reagent; and (3) preparation of YOF:5%Eu<3+> nanofibres: heating the YF3:5%Eu<3+> nanofibres at a temperature of 700 DEG C in the air for 9 hours to obtain the YOF:5%Eu<3+> nanofibres, wherein the diameter of the YOF:5%Eu<3+> nanofibre is 150-190nm, and the length of the YOF:5%Eu<3+> nanofibre is more than 300 mu m. The europium and fluorine-doping yttrium oxide nanofibres are novel and important red nano flourescent materials, and are wide in application prospects.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a method for preparing europium-doped yttrium oxyfluoride nanofibers. Background technique [0002] Nanofiber refers to a linear material with two dimensions in the nanoscale on the three-dimensional space scale of the material, usually the radial dimension is on the order of nanometers, and the length is relatively large. Since the radial scale of nanofibers is as small as nanometers, it shows a series of characteristics, the most prominent is the large specific surface area, which increases its surface energy and activity, and then produces small size effects, surface or interface effects, and quantum size effects. , macroscopic quantum tunneling effect, etc., and therefore exhibit a series of chemical and physical (heat, light, sound, electricity, magnetism, etc.) aspects of specificity. In the prior art, there are many methods for preparing nanofibers, such ...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01F11/00D01D5/00
Inventor 董相廷侯远王进贤刘桂霞于文生徐佳
Owner CHANGCHUN UNIV OF SCI & TECH
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