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Polycrystalline nano-fiber with europium ion doped with lanthanum aluminate and preparation method thereof

A nanofiber and composite nanofiber technology, applied in the field of europium ion doped lanthanum aluminate polycrystalline nanofiber and its preparation

Inactive Publication Date: 2010-07-28
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LaAlO has not been seen so far 3 and LaAlO 3 :Eu 3+ report on nanofibers

Method used

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  • Polycrystalline nano-fiber with europium ion doped with lanthanum aluminate and preparation method thereof
  • Polycrystalline nano-fiber with europium ion doped with lanthanum aluminate and preparation method thereof
  • Polycrystalline nano-fiber with europium ion doped with lanthanum aluminate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: Preparation of LaAlO 3 polycrystalline nanofibers. Weigh a certain amount of lanthanum nitrate and aluminum nitrate, the molar ratio of lanthanum nitrate and aluminum nitrate is 1:1, dissolve in an appropriate amount of DMF solvent, then weigh a certain amount of PVP and add it to the above solution, and stir magnetically at room temperature 2h, and stand still for 2h, you can get a uniform, transparent spinning solution with a certain viscosity. The mass percentages of the components of the spinning solution are: 6% nitrate content, 15% PVP content, and 79% DMF content. 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 17kV is applied, the curing distance is 16cm, and the room temperature is 18°C. ℃, relative humidity is 40%, get PVP / [La(NO 3 ) 3 +Al(NO 3 ) 3 ] Composite nan...

Embodiment 2

[0031] Embodiment 2: prepare La 1-x Eu x AlO 3 (x=0.05) Polycrystalline nanofibers. Weigh a certain amount of lanthanum nitrate, europium nitrate and aluminum nitrate, wherein the molar ratio of lanthanum nitrate and europium nitrate is 0.95:0.05, and the molar ratio of [lanthanum nitrate + europium nitrate] to aluminum nitrate is 1:1, dissolve in an appropriate amount of DMF solvent, then weighed a certain amount of PVP and added to the above solution, stirred magnetically at room temperature for 2 hours, and stood still for 3 hours to obtain a uniform, transparent spinning solution with a certain viscosity. The mass percentages of the components of the spinning solution are: 6% nitrate content, 15% PVP content, and 79% DMF content. 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 17kV is applied,...

Embodiment 3

[0032] Embodiment 3: prepare La 1-x Eu x AlO 3 (x=0.1) Polycrystalline nanofibers. Weigh a certain amount of lanthanum nitrate, europium nitrate and aluminum nitrate, wherein the molar ratio of lanthanum nitrate and europium nitrate is 0.9:0.1, and the molar ratio of [lanthanum nitrate + europium nitrate] to aluminum nitrate is 1:1, dissolve in an appropriate amount of DMF solvent, then weighed a certain amount of PVP and added to the above solution, stirred magnetically at room temperature for 4 hours, and stood still for 2 hours to obtain a uniform, transparent spinning solution with a certain viscosity. The mass percentages of the components of the spinning solution are: 10% of nitrate content, 10% of PVP content and 80% of DMF content. 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 20kY is ap...

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Abstract

The invention relates to polycrystalline nano-fiber with europium ion doped with lanthanum aluminate and a preparation method thereof, which belongs to the technical field of nano-material preparation. The invention comprises three steps of: (1) preparation of spinning solution; dissolving lanthanum nitrate, europium nitrate, aluminium nitrate and PVP in DMF to form the spinning solution. (2) preparing PVP / metal nitrate composite nano-fiber with the electrospinning technology, 17-20kV of voltage , 16-20 cm of solidification distance , room temperature in 18-28 degrees C., and 40-50 percent of relative humidity. (3) preparing La1-xEuxAlO3 (x = 0-0.1) nano-fiber: heat-processing the PVP / metal nitrate composite nano-fiber to obtain La1-xEuxAlO3 (x = 0-0.1) polycrystalline nano-fiber; the nano-fiber is composed of nano-particles, has the diameter of 75-100 nm and the length of more than 300 Mum, has good crystallinity, and belongs to the rhombohedral crystal system.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to europium ion-doped lanthanum aluminate polycrystalline nanofibers and a preparation method thereof. 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 f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B1/00B82B3/00
Inventor 董相廷王进贤秦菲刘桂霞刘莹于文生
Owner CHANGCHUN UNIV OF SCI & TECH
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