A kind of vanadium pentoxide micro-nano particle and its preparation method and application

Abstract

The invention provides micro-nano particles, which are vanadium pentoxide micro-nano particles and are formed by self-assembly of nanosheets. The invention also provides a method for preparing the micro-nano particles. The method includes the following steps: 1) adding vanadium pentoxide into ethylene glycol and stirring to mix evenly to form suspension A; 2) adding vanadium pentoxide to the suspension A adds sodium bicarbonate solution to form suspension B; 3) Heat suspension B and then let it cool at room temperature to obtain a precursor containing black precipitate; 4) Add the mixed solution containing the precursor formed in step 3) Centrifuge, wash and dry to obtain a flower-like vanadium oxide precursor formed by the self-assembly of nanosheets; 5) Calculate the precursor obtained in step 4) in an air atmosphere to obtain the micro-nano particles. The invention also provides applications of the micro-nano particles in the fields of new energy, environmental detection, food and medicine.

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...

Examples

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...

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...

Examples

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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