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Vanadium trioxide nanoparticles and preparation method thereof

A vanadium trioxide nano-particle technology, applied in the field of materials, can solve the problems of unfavorable large-scale production, high cost of raw materials, complicated methods, etc., and achieve the effect of convenient self-assembly into devices, high specific surface area, and simple operation

Active Publication Date: 2019-02-05
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The morphology synthesized by other methods is obviously different from the above-mentioned vanadium trioxide particles, such as sea urchin-shaped vanadium trioxide microparticles
[0003] The raw material cost of the above method is high and the method is complicated, which is not conducive to large-scale production and brings great inconvenience to subsequent use.

Method used

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  • Vanadium trioxide nanoparticles and preparation method thereof
  • Vanadium trioxide nanoparticles and preparation method thereof
  • Vanadium trioxide nanoparticles and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Follow the steps below to prepare vanadium trioxide nanoparticles:

[0035] 1) Add the commercially available vanadium pentoxide into the ethylene glycol solution, and stir vigorously in a water bath at 50°C for 2 hours to make it evenly mixed to form suspension A; the molar concentration of vanadium pentoxide in suspension A is 0.1 M;

[0036] 2) Add 1 mL of hydrochloric acid to the suspension A, so that the color of the suspension A changes from brownish yellow to dark red to form a suspension B, wherein the mass concentration of hydrochloric acid is 23%;

[0037] 3) Put the suspension B in an autoclave and heat it at 200°C for 36 hours. After standing at room temperature and cooling down, the mixed solution containing dark blue precipitate can be obtained;

[0038]4) Centrifuge the mixed solution containing dark blue precipitate formed in step 3) at a centrifugal speed of 2000-3000rpm, wash with ethanol and deionized water respectively until the supernatant is color...

Embodiment 2

[0040] Nanoparticles were prepared as follows:

[0041] 1) Add commercial vanadium pentoxide to ethylene glycol solution, stir vigorously in a water bath at 70°C for 2 hours to make it evenly mixed to form suspension A; the molar concentration of vanadium pentoxide in suspension A is 0.2mM ;

[0042] 2) Add 3 mL of hydrochloric acid to the suspension A, so that the color of the suspension A changes from brownish yellow to dark red to form a suspension B, wherein the mass concentration of hydrochloric acid is 23%;

[0043] 3) Put the suspension B into an autoclave and heat it, the heating temperature is 240°C, the heating time is 40 hours, and after cooling at room temperature, a mixed solution containing a dark blue precipitate can be obtained;

[0044] 4) Centrifuge the mixed solution containing dark blue precipitate formed in step 3) at a centrifugal speed of 2000-3000rpm, wash with ethanol and deionized water respectively until the supernatant is colorless and transparent,...

Embodiment 3

[0046] Nanoparticles were prepared as follows:

[0047] 1) Add commercial vanadium pentoxide into the ethylene glycol solution, and stir vigorously in a water bath at 60°C for 2 hours to make it evenly mixed to form suspension A; the molar concentration of vanadium pentoxide in suspension A is 0.25mM ;

[0048] 2) Add 4 mL of hydrochloric acid to the suspension A, so that the color of the suspension A changes from brownish yellow to dark red to form a suspension B, wherein the mass concentration of hydrochloric acid is 36%;

[0049] 3) Put the suspension B into an autoclave and heat it. The heating temperature is 260°C and the heating time is 44 hours. After standing at room temperature and cooling, a mixed solution containing a dark blue precipitate can be obtained;

[0050] 4) Centrifuge the mixed solution containing dark blue precipitate formed in step 3) at a centrifugal speed of 2000-3000rpm, wash with ethanol and deionized water respectively until the supernatant is col...

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Abstract

The invention belongs to the field of materials and relates to vanadium trioxide nanoparticles. The vanadium trioxide nanoparticles are spherical in shape, have a particle size range of 50-100 nanometers, and a specific surface area of ​​120.4±0.1 square meters per gram. The invention also provides a method for preparing vanadium trioxide nanoparticles. The method includes: adding commercially available vanadium pentoxide into ethylene glycol, stirring and mixing evenly to form suspension A; adding hydrochloric acid to suspension A to form a pH of about Suspension B is 1; heat suspension B and let it cool at room temperature to obtain a product containing dark blue precipitate; centrifuge the mixed solution containing the product containing dark blue precipitate, wash and dry to obtain spherical nanoparticles. The vanadium oxide nanoparticles of the present invention have a high specific surface area and strong structural stability, which are helpful to improve their performance as electrical materials and catalysts.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a vanadium trioxide nanoparticle, in particular to a quasi-spherical vanadium trioxide nanoparticle and a preparation method. Background technique [0002] Vanadium trioxide is well known as a conventional catalyst. In recent years, with the gradual deepening of research on its nanostructure, people not only pay attention to its performance in the field of traditional catalysts, but also its excellent performance in emerging lithium battery electrode materials has gradually attracted widespread attention. Vanadium trioxide is a material with the interconversion properties of conductor and insulator. Substances with this property will have a qualitative leap in their conductivity at a certain temperature, that is, from a conductor to an insulator or from an insulator to a conductor, and this process is reversible. It is well known that the properties and application performance of nanomat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22B82Y40/00
CPCB82Y40/00B01J23/22B01J35/51B01J35/40B01J35/615
Inventor 付海涛杨晓红安希忠谢辉
Owner NORTHEASTERN UNIV LIAONING
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