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A kind of vanadium trioxide micro-nano particles and preparation method thereof

A vanadium trioxide micro-nano and micro-nano particle technology, applied in the nanometer field, can solve the problems of complex methods, waste acid production in products, and high cost of raw materials, and achieve the effects of wide application prospects, mild method conditions, and simple operation

Inactive Publication Date: 2017-09-01
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, the method is complicated, and the product is produced by waste acid, which is not green enough and not suitable for large-scale production, which brings great inconvenience to subsequent use.

Method used

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  • A kind of vanadium trioxide micro-nano particles and preparation method thereof
  • A kind of vanadium trioxide micro-nano particles and preparation method thereof
  • A kind of vanadium trioxide micro-nano particles and preparation method thereof

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Effect test

Embodiment 1

[0049] Follow the steps below to prepare micro-nanoparticles:

[0050] 1) Synthesis of flower-like vanadium oxide precursors formed by self-assembly of nanosheets:

[0051] 1.1) Add commercial vanadium pentoxide into the ethylene glycol solution, and vigorously stir in a water bath at 50° C. for 2 hours to make it evenly mixed to form a suspension A; the molar concentration of the suspension A is 0.075 mM;

[0052] 1.2) Add 1 mL of sodium bicarbonate solution to the suspension A to change the color of the suspension from brownish yellow to light yellow to form suspension B, wherein the molar concentration of the sodium bicarbonate solution is 1.5M;

[0053]1.3) Put the suspension B in an autoclave and heat it at 180°C for 12 hours. After standing at room temperature and cooling, the precursor containing black precipitate can be obtained;

[0054] 1.4) Centrifuge the product mixture solution containing precipitate formed in step 1.3) at a centrifugal speed of 2000-3000 rpm, wa...

Embodiment 2

[0058] Follow the steps below to prepare micro-nanoparticles:

[0059] 1) Synthesis of flower-like vanadium oxide precursors formed by self-assembly of nanosheets:

[0060] 1.1) Add commercial vanadium pentoxide into ethylene glycol solution, and vigorously stir in a water bath at 70° C. for 2 hours to make it evenly mixed to form a suspension A; the molar concentration of the suspension A is 0.3 mM;

[0061] 1.2) Add 10 mL of sodium bicarbonate solution to the suspension A to change the color of the suspension from brownish yellow to light yellow to form suspension B, wherein the molar concentration of the sodium bicarbonate solution is 1M;

[0062] 1.3) Put the suspension B into an autoclave and heat it at 260°C for 36 hours. After standing at room temperature and cooling, the precursor containing black precipitate can be obtained;

[0063] 1.4) Centrifuge the product mixed solution containing precipitate formed in step 1.3) at a centrifugal speed of 2000-3000 rpm, wash wit...

Embodiment 3

[0067] Follow the steps below to prepare micro-nanoparticles:

[0068] 1) Synthesis of flower-like vanadium oxide precursors formed by self-assembly of nanosheets:

[0069] 1.1) Add commercial vanadium pentoxide into ethylene glycol solution, and vigorously stir in a water bath at 60° C. for 2 hours to make it evenly mixed to form a suspension A; the molar concentration of the suspension A is 0.15 mM;

[0070] 1.2) Add 5 mL of sodium bicarbonate solution to the suspension A, so that the color of the suspension changes from brownish yellow to light yellow to form suspension B, wherein the molar concentration of the sodium bicarbonate solution is 1.25M;

[0071] 1.3) Put the suspension B into an autoclave and heat it at 220°C for 24 hours. After standing at room temperature and cooling, the precursor containing black precipitate can be obtained;

[0072] 1.4) Centrifuge the product mixed solution containing precipitate formed in step 1.3) at a centrifugal speed of 2000-3000 rpm...

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Abstract

The invention provides a micro-nano particle. The micro-nano particle is a vanadium trioxide micro-nano particle, and is formed through self-assembling nano-sheets. The invention also provides a preparation method of the micro-nano particle. The method comprises the following steps: 1, adding vanadium pentoxide to ethylene glycol, and stirring vanadium pentoxide and ethylene glycol to make vanadium pentoxide and ethylene glycol be uniformly mixed in order to form a suspension A; 2, adding a sodium bicarbonate solution to the suspension A to form a suspension B; 3, heating the suspension B, and carrying out room temperature standing and cooling on the heated suspension B to obtain a black precipitate-containing precursor; 4, centrifuging a precursor-containing mixed solution formed in step 3, washing the centrifuged product, and drying the washed product to obtain a flower-like vanadium oxide precursor formed through self-assembling nano-sheets; and 5, calcining the precursor obtained in step 4 in nitrogen atmosphere to obtain the micro-nano particle. The vanadium trioxide micro-nano particle has a very high specific surface area and strong structure stability, and is helpful for improving the performances as an electric material and a catalyst.

Description

technical field [0001] The invention relates to the field of nanotechnology, in particular to a micro-nano particle and its preparation method and application. Background technique [0002] Due to its unique sheet structure and excellent optical, electrical, and magnetic properties, vanadium oxide nanoparticles have excellent performance in the fields of lithium batteries, gas sensing, and catalysis, and have attracted widespread attention. Vanadium oxide mainly includes three oxides: vanadium pentoxide, vanadium dioxide and vanadium trioxide. Different vanadium oxides are used in different fields according to their different properties. Since this patent only relates to vanadium trioxide, it is only briefly described. Vanadium trioxide is well known as a conventional catalyst. In recent years, with the deepening of research on its nanostructure, its excellent performance in traditional catalysis and new lithium-ion batteries has attracted widespread attention. Vanadium ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02B82Y40/00
CPCC01G31/02C01P2002/72C01P2004/36C01P2004/60
Inventor 付海涛杨晓红安希忠谢辉
Owner NORTHEASTERN UNIV LIAONING
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