Process for preparing uropium-doped yttrium oxide @ silicon dioxide bean-shaped nano-cables

A nanocable, europium yttrium oxide technology, applied in nanostructure manufacturing, cable/conductor manufacturing, nanotechnology, etc.

Inactive Publication Date: 2010-04-14
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Process for preparing uropium-doped yttrium oxide @ silicon dioxide bean-shaped nano-cables
  • Process for preparing uropium-doped yttrium oxide @ silicon dioxide bean-shaped nano-cables
  • Process for preparing uropium-doped yttrium oxide @ silicon dioxide bean-shaped nano-cables

Examples

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Embodiment 1

[0018] Example 1: Weigh a certain amount of PVP (Mr=1300000), add it to the mixture (4:1) of absolute ethanol (AR) and tetraethylorthosilicate (AR), and stir it magnetically for 6 hours at room temperature After standing still for 3 hours, a uniform and clear shell spinning solution was obtained. The mass percentages of the substances in the shell spinning solution were: 12% of PVP, 68% of ethanol, and 20% of ethyl orthosilicate. Weigh a certain amount of Y 2 o 3 (99.99%), and then dissolve it with concentrated nitric acid, which should be gradually added dropwise and heated until completely dissolved to obtain transparent Y(NO 3 ) 3 solution, and then distill off excess concentrated nitric acid to obtain Y(NO 3 ) 3 Polycrystalline; then weigh a certain amount of PVP, add it to the mixed solution of DMF and glycerin (5:1), stir at room temperature for 3 hours, then add Y(NO 3 ) 3 , continue to stir for 6h and then leave it to stand for 3h to obtain a uniform core layer s...

Embodiment 2

[0019] Example 2: Weigh a certain amount of PVP (Mr=1300000), add it to the mixture (4:1) of absolute ethanol (AR) and tetraethylorthosilicate (AR), and stir it magnetically for 6 hours at room temperature After standing still for 3 hours, a uniform and clear shell spinning solution was obtained. The mass percentages of the substances in the shell spinning solution were: 12% of PVP, 68% of ethanol, and 20% of ethyl orthosilicate. Weigh a certain amount of Y 2 o 3 and Eu 2 o 3 (where Eu 3+ The mole fraction is 5%), then dissolve it with concentrated nitric acid, concentrated nitric acid should be gradually added dropwise and heated until completely dissolved to obtain transparent Y (NO 3 ) 3 and Eu(NO 3 ) 3 Mix the solution, then distill off the excess concentrated nitric acid to get Y(NO 3 ) 3 and Eu(NO 3 ) 3 Mix the polycrystals; weigh a certain amount of PVP again, add it to the mixed solution of DMF and glycerin (volume ratio is 5:1), stir at room temperature for...

Embodiment 3

[0020] Embodiment 3: take a certain amount of Y 2 o 3 and Eu 2 o 3 (where Eu 3+ The mole fraction is 5%), then dissolve it with concentrated nitric acid, concentrated nitric acid should be gradually added dropwise and heated until completely dissolved to obtain transparent Y (NO 3 ) 3 and Eu(NO 3 ) 3 Mix the solution, then distill off the excess concentrated nitric acid to get Y(NO 3 ) 3 and Eu(NO 3 ) 3 Mix the polycrystals; weigh a certain amount of PVP again, add it to the mixed solution of DMF and glycerin (volume ratio is 5:1), stir at room temperature for 3h, add Y(NO 3 ) 3 and Eu(NO 3 ) 3 The mixture was left to stand for 2 hours after continuing to stir for 4 hours to obtain a uniform core layer spinning solution, and the mass percentage of each substance in the core layer spinning solution was: Y(NO 3 ) 3 and Eu(NO 3 ) 3 8%, PVP 9%, Glycerin 18%, DMF 65%. Weigh a certain amount of PVP (Mr=1300000), add it into the mixture (4:1) of absolute ethanol (AR...

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Abstract

The invention relates to a process for preparing uropium-doped yttrium oxide @ silicon dioxide bean-shaped nano-cables, which belongs to the technical field of nano-material preparation. The process includes three steps: (1) preparing spinning liquor; (2) preparing (PVP + rare-earth nitrate) @ (PVP + tetraethoxysilane) recombination nano-cables; (3) preparing Y2O3 @ SiO2 or Y2O3: Eu3 + @SiO2 bean-shaped nano-cables. The first step includes: adding a certain amount of mixed liquor(volume ratio is 5:1) including polyvinyl-pyrrolidone (PVP), N,N-dimethylformamide (DMF) and glycerol into the rare-earth nitrate; stirring the mixed liquor for 4-6 hours with a magnetic force under room temperature; standing the mixed liquor for 2-3 hours to obtain core layer spinning liquor, wherein mass percentage includes that the PVP is 9%, the rare-earth nitrate is 8%, the DMF is 65% and the glycerol is 18%; mixing a certain amount of mixed liquor ( volume ratio is 4:1) including the PVP, absolute ethyl alcohol and the tetraethoxysilane, stirring the mixed liquor with the magnetic force for 3-6 hours, and standing the mixed liquor to obtain shell layer spinning liquor, wherein the mass percentage includes that the PVP is 12%, the tetraethoxysilane is 20% and the ethyl alcohol is 68%. The second step includes that coaxial electrostatic spinning technology is adopted, and parameters include: coaxial nozzles are formed by adopting a 10# stainless steel injection needle after being cut flat (outer diameter=1.0 millimeter, inner diameter=0.7 millimeter) as an inner nozzle needle and adopting a 12# stainless steel needle head (outer diameter=1.4 millimeters, inner diameter=1.2 millimeters) as an outer nozzle needle. Further, the two nozzle needles are sleeved and fixed, the prepared shell layer spinning liquor is placed in an outer pipe of a coaxial spinning device, the core layer spinning liquor is added in an inner pipe.

Description

technical field [0001] The invention relates to the technical field of preparation of nanomaterials, in particular to a preparation method of europium-doped yttrium oxide@silicon dioxide bean-shaped cables. Background technique [0002] The preparation and properties of one-dimensional nanostructured materials are one of the frontier hotspots in the field of materials science. Nanocables (Nanocables) have attracted great attention in recent years because of their unique properties, rich scientific connotations, broad application prospects and important strategic positions in future nanostructure devices. The research on coaxial nano-cables started in the mid-1990s, and developed rapidly after 2000. So far, people have successfully prepared hundreds of coaxial nano-cables by using different synthesis methods and different types of materials, such as: Fe / C, Zn / ZnO, C / C, SiC / C, SiGaN / SiO x N y And the three-layer structure of Fe-C-BN and α-Si 3 N 4 -Si-SiO 2 Wait. Accor...

Claims

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Application Information

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IPC IPC(8): D01D5/34D01D1/02H01B13/00B82B3/00D01F9/08
Inventor 王进贤董相廷张贺刘桂霞于文生
Owner CHANGCHUN UNIV OF SCI & TECH
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