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A kind of hexagonal flaky cobalt trioxide nanometer material and preparation method thereof

A technology of tricobalt tetroxide and hexagonal flakes, which is applied in the field of nanomaterials, can solve problems such as insufficient preparation conditions, achieve narrow particle size distribution, high yield, and reduce production costs

Active Publication Date: 2018-09-21
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, both strong acid and strong alkali are used, and the preparation conditions are not mild enough

Method used

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  • A kind of hexagonal flaky cobalt trioxide nanometer material and preparation method thereof
  • A kind of hexagonal flaky cobalt trioxide nanometer material and preparation method thereof
  • A kind of hexagonal flaky cobalt trioxide nanometer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve 2.5 mmol of cobalt sulfate heptahydrate in 100 ml of deionized water to form solution A; dissolve 1.2 g of DTC in 50 ml of deionized water, add 2.5 g of hexylamine, and stir for 10 min to form solution B. Under vigorous stirring, slowly add solution B to solution A to form mixture C. After stirring for 30 minutes, pour mixture C into a 100ml reactor lined with polytetrafluoroethylene with a filling degree of 70% and place it at 80°C React in an oven for 48 hours. After the reaction, the resulting product is washed, filtered, dried overnight in a vacuum at 70°C, and then calcined at 500°C for 2 hours to obtain hexagonal flake cobalt tetroxide, which is referred to as S-1.

Embodiment 2

[0039] Dissolve 250mmol of cobalt nitrate hexahydrate in 100ml of deionized water to form solution A; dissolve 7.5g of SE 30 in 50ml of deionized water, add 25g of dipropylamine and stir for 10min to form solution B. Under vigorous stirring, slowly add solution B to solution A to form mixture C. After stirring for 40 minutes, pour mixture C into a 100ml reactor lined with polytetrafluoroethylene with a filling degree of 70% and place it at 220°C After reacting in an oven for 10 hours, the product obtained after the reaction was washed, filtered, dried overnight in a vacuum at 50°C, and then calcined at 400°C for 3 hours to obtain hexagonal flake cobalt tetroxide, denoted as S-2.

Embodiment 3

[0041] Dissolve 100mmol of cobalt acetate tetrahydrate in 100ml of deionized water to form solution A; dissolve 5g of Tween80 in 50ml of deionized water, add 20g of tripropylamine, and stir for 10min to form solution B. Under vigorous stirring, slowly add solution B to solution A to form mixture C. After stirring for 30 minutes, pour mixture C into a 100ml reactor lined with polytetrafluoroethylene with a filling degree of 70% and place it at 150℃ After reacting in an oven for 20 hours, the product obtained after the reaction was washed, filtered, dried overnight in a vacuum at 90°C, and then calcined at 300°C for 5 hours to obtain hexagonal flake cobalt tetroxide, denoted as S-3.

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Abstract

The invention relates to a hexagonal flaky cobalt trioxide nanometer material and a preparation method thereof. The method comprises the following steps: 1) dissolving a cobalt salt in deionized water to form a homogeneous solution A; 2) dissolving a solubilizing agent in deionized water, and then Under stirring conditions, add an insoluble or slightly water-soluble organic amine to the solubilizer solution to form a solution B; 3) Mix solution A and solution B to obtain a mixture C, and transfer the obtained mixture C to a reaction kettle Carry out hydrothermal reaction, wash, dry, and roast to obtain hexagonal flaky tricobalt tetroxide. The invention has the advantages of simple experimental process, high yield, uniform particle size distribution, low raw material price, only needs water as a solvent, is environmentally friendly, and is suitable for industrial scale-up production.

Description

Technical field [0001] The invention belongs to the technical field of nano materials, and in particular relates to a hexagonal sheet-shaped cobalt tetroxide nano material and a preparation method thereof. Background technique [0002] Cobalt tetroxide is an important type of P-type semiconductor material, which has a wide range of applications in the fields of varistor ceramics, chemical sensors, lithium ion electromagnetics, supercapacitors, photocatalysis and heterogeneous catalysis, and its physical and chemical properties are closely related to morphology. In recent years, cobalt tetroxide materials with different morphologies and structures have attracted widespread attention. Cobalt tetroxide nanospheres, nanocubes, nanorods, nanobelts, nanosheets, and nanotubes have been synthesized through different preparation methods. Among them, the hexagonal flake cobalt tetroxide is a powder with a two-dimensional structure. It has a larger area of ​​the end face and a smaller area ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/04B82Y40/00
Inventor 王胜王树东陈志萍高典楠汪明哲高秀慧
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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