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Vanadium pentoxide micro-nano particles and preparation method and application thereof

A technology of vanadium pentoxide micro-nano and micro-nano particles, applied in the field of nanometers, which can solve the problems of waste acid production, complex methods, and high raw material costs, and achieve the effects of mild method conditions, wide application prospects, and easy-to-source sources

Inactive Publication Date: 2016-09-21
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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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  • Vanadium pentoxide micro-nano particles and preparation method and application thereof
  • Vanadium pentoxide micro-nano particles and preparation method and application thereof
  • Vanadium pentoxide micro-nano particles and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0051] Follow the steps below to prepare micro-nanoparticles:

[0052] 1) Synthesis of flower-like vanadium oxide precursors formed by self-assembly of nanosheets:

[0053] 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;

[0054] 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;

[0055] 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;

[0056] 1.4) Centrifuge the product mixture solution containing precipitate formed in step 1.3) at a centrifugal speed of 2000-3000 rpm, was...

Embodiment 2

[0060] Follow the steps below to prepare micro-nanoparticles:

[0061] 1) Synthesis of flower-like vanadium oxide precursors formed by self-assembly of nanosheets:

[0062] 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;

[0063] 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;

[0064] 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;

[0065] 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

[0069] Follow the steps below to prepare micro-nanoparticles:

[0070] 1) Synthesis of flower-like vanadium oxide precursors formed by self-assembly of nanosheets:

[0071] 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;

[0072] 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;

[0073] 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;

[0074] 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 micro-nano particles; the micro-nano particles are vanadium pentoxide micro-nano particles and are formed by self assembly of nano sheets. The invention also provides a preparation method of the micro-nano particles, wherein the method comprises the following steps: 1) adding vanadium pentoxide to ethylene glycol, stirring to mix evenly, and forming a suspension A; 2) adding a sodium bicarbonate solution to the suspension A to form a suspension B; 3) heating the suspension B, and then standing and cooling at room temperature, to obtain a precursor containing a black precipitate; 4) carrying out centrifugal separation of the mixed solution containing the precursor and formed in the step 3), washing, and drying, to obtain a flower-shaped vanadium oxide precursor formed by nanosheet self-assembling; and 5) calcining the precursor obtained in the step 4) in an air atmosphere to obtain the micro-nano particles. The invention also provides an application of the micro-nano particles in the fields of new energy resources, environmental detection, food and medicines.

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 pentoxide, it is only briefly described. Vanadium pentoxide is well known as a traditional catalyst for the production of sulfuric acid. In recent years, as the research on its nanostructure has gradually deepened, its excellent performance in lithium-ion batteries and gas sensing has attracted w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G31/02C01P2002/72C01P2004/03C01P2004/32C01P2004/61C01P2006/12
Inventor 付海涛杨晓红安希忠谢辉
Owner NORTHEASTERN UNIV
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