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Preparation method of Ni single atom doped cobaltosic oxide nano material and product and application thereof

A technology of cobalt tetroxide and nanomaterials, applied in cobalt oxide/cobalt hydroxide, nanotechnology, analytical materials, etc., can solve problems to be further improved, and achieve improved electrical properties and catalytic properties, easy process conditions, and simple preparation methods. Effect

Inactive Publication Date: 2020-04-28
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still room for further improvement in terms of further performance enhancement

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  • Preparation method of Ni single atom doped cobaltosic oxide nano material and product and application thereof

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Embodiment 1

[0019] A Ni single atom doped tricobalt tetroxide nanomaterial, using microwave hydrothermal reaction and subsequent heat treatment method, first using microwave hydrothermal reaction to synthesize Ni precursor solution, taking Ni precursor and placing it in Co precursor solution, continuing microwave reaction, Then the resulting product was heat-treated in a hydrogen atmosphere to obtain nickel single-atom-doped Co 3 o 4 Nanomaterials are prepared as follows:

[0020] Step 1: Take 0.5mmol of Co(NO 3 ) 2 ·6H 2 O was dissolved in 50 mL of DMF; 2 mmol of sodium citrate and 2 mmol of hexamethylenetetramine were dissolved in 50 mL of DMF, and the two were mixed and stirred evenly to obtain solution A;

[0021] Step 2: Get 0.5mmol of nickel nitrate and dissolve it in 10mL of DMF to obtain a nickel nitrate solution; get 0.2mmol of trimesic acid and dissolve it in 10mL of DMF to obtain a trimesic acid solution; dissolve the trimesic acid solution Inject the nickel nitrate soluti...

Embodiment 2

[0025] A kind of Ni single-atom doped tricobalt tetroxide nanometer material, similar to embodiment 1, is prepared according to the following steps:

[0026] Step 1: Take 2mmol of Co(NO 3 ) 2 ·6H 2 O was dissolved in 50 mL of dimethylformamide (DMF); 3 mmol of sodium citrate and 6 mmol of hexamethylenetetramine were dissolved in 50 mL of DMF, and the two were mixed and stirred evenly to obtain solution A;

[0027] Step 2: Get 0.5mmol of nickel nitrate and dissolve it in 10mL of DMF to obtain solution B nickel nitrate solution; get 0.3mmol of trimesic acid and dissolve it in 10mL of DMF to obtain solution C trimesic acid solution; Solution B was injected into solution C at a rate of 20 microliters per second, and stirred to obtain mixed solution D; the mixed solution D was transferred to a glass vessel, and reacted in a microwave reactor at 140°C for 30 minutes to obtain solution E;

[0028] Step 3: Mix 0.4mL of solution E with solution A, transfer it to a polytetrafluoroeth...

Embodiment 3

[0031] A kind of Ni single-atom doped tricobalt tetroxide nanometer material, similar to embodiment 1, is prepared according to the following steps:

[0032] Step 1: Take 2.5mmol of Co(NO 3 ) 2 ·6H 2 O was dissolved in 50mL of DMF; 1mmol of sodium citrate and 5mmol of hexamethylenetetramine were dissolved in 50mL of DMF, wherein the molar ratio of sodium citrate and hexamethylenetetramine was 1:5~5: 1. Mix and stir the two evenly to obtain solution A;

[0033]Step 2: Take 0.5 mmol of nickel nitrate and dissolve it in 10 mL of DMF to obtain solution B nickel nitrate solution; take 0.2 mmol of 2,5-dihydroxyterephthalic acid and dissolve it in 10 mL of DMF to obtain solution C; Inject solution C into solution B at a rate of 20 microliters per second, stir to obtain mixed solution D; transfer mixed solution D to a glass vessel, and react in a microwave reactor at 130°C for 30-40 minutes to obtain solution E;

[0034] Step 3: Mix 0.5mL of solution E with solution A, transfer to...

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Abstract

The invention discloses a preparation method of a Ni single atom doped cobaltosic oxide nano material and a product and application thereof. The nickel atom doped Co3O4 nano material is prepared by adopting a microwave hydrothermal reaction and subsequent heat treatment method. The preparation method comprises the following steps: firstly, synthesizing a Ni precursor solution by utilizing a microwave hydrothermal reaction, putting a proper amount of Ni precursor into a Co precursor solution, continuing the microwave reaction, and then putting the obtained product into a hydrogen atmosphere forheat treatment to obtain the nickel monatomic doped Co3O4 nano material. The obtained nano material has a large specific surface area, is used in the fields of formaldehyde gas detection, hydrogen preparation by photocatalysis of water and the like, and can increase the contact area between the material and reactants; and the defect mode of the nano material can be increased through nickel monatomic doping, a very important role is played in improving the electrical property and catalytic property of the material, the preparation method is simple, and the process conditions are easy to realize.

Description

technical field [0001] The invention relates to the field of preparation of nanocomposite materials, in particular to a preparation method of Ni single-atom-doped tricobalt tetroxide nanomaterial and its product and application. Background technique [0002] Metal oxide semiconductor materials such as α-Fe 2 o 3 , SnO 2 , ZnO, TiO 2 Due to its good stability, abundant reserves, and easy processing, it has been widely used in various fields, especially Co 3 o 4 It is a widely cited catalytic material and gas-sensing material, and its related research as a negative electrode material for lithium-ion batteries has gradually attracted the attention of researchers. However, in the field of practical application, pure metal oxides have certain limitations. For example, in the field of gas detection, it is difficult for metal oxides to meet the requirements in terms of sensitivity, response temperature, and selectivity at the same time. In the field of photocatalysis, the band...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04B22F9/22G01N33/00B82Y30/00
CPCC01G51/04B22F9/22G01N33/0047B82Y30/00C01P2004/80
Inventor 崔大祥葛美英徐磊张芳李梦飞王丹卢静胡雅萍
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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