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Preparation method of high-uniformity nickel oxide

A uniformity and nickel oxide technology, applied in the direction of nickel oxide/nickel hydroxide, etc., can solve the problems of uneven material appearance, failure to achieve large-area regularity, etc., and achieve low cost, simple operation, and low energy consumption.

Active Publication Date: 2020-06-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the morphology of these materials is often inhomogeneous and cannot achieve large-area regularity.

Method used

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  • Preparation method of high-uniformity nickel oxide
  • Preparation method of high-uniformity nickel oxide

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preparation example Construction

[0022] The invention provides a method for preparing nickel oxide with high uniformity, comprising the following steps:

[0023] Mix nickel chloride hexahydrate, sodium oxalate, ethylene glycol and water to obtain a clear solution;

[0024] subjecting the clarified solution to a hydrothermal reaction to obtain a hydrothermal product;

[0025] The hydrothermal product is calcined to obtain the high-uniformity nickel oxide.

[0026] The invention mixes nickel chloride hexahydrate, sodium oxalate, ethylene glycol and water to obtain a clear solution.

[0027] In the present invention, the volume ratio of the mass of nickel chloride hexahydrate to water is preferably (0.07-0.08) g:(10-60) mL.

[0028] In the present invention, the volume ratio of the mass of the sodium oxalate to water is preferably (0.05-0.06) g:(10-60) mL.

[0029] In the present invention, the mass ratio of nickel chloride hexahydrate to sodium oxalate is preferably (0.07-0.08):(0.05-0.06).

[0030] In the ...

Embodiment 1

[0042] At room temperature (20°C), put 0.0743g of nickel chloride hexahydrate into a beaker with a capacity of 100mL, add 30mL of deionized water to dissolve completely, then add 0.055g of sodium oxalate and stir evenly, and then add 30mL of ethylene glycol. The combined solution was stirred for 20 minutes to form a clear solution. The clear liquid was transferred to a reaction kettle with a capacity of 100 mL, and reacted at a temperature of 160° C. for 6 hours. After the reaction, the autoclave was naturally cooled to room temperature. The product was collected by centrifugation, washed three times with deionized water and absolute ethanol, and then dried at 70° C. for 10 h to obtain a blue-green product. Finally, the blue-green product was calcined in air at a temperature of 400° C. at a rate of 1.0° C. / min in a muffle furnace and kept for 6 hours. The nickel oxide product was collected. Name it S3.

Embodiment 2～4

[0044] Carry out according to the step of Example 1, the only difference is that the amount of ethylene glycol is changed to 0mL, 20mL and 50mL respectively under the situation of keeping the total solvent volume of 60mL to obtain different nickel oxides, which are named as S1 respectively (Example 2) , S2 (embodiment 3) and S4 (embodiment 4).

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Abstract

The invention provides a preparation method of high-uniformity nickel oxide, and belongs to the field of micro-nano material preparation. In a hydrothermal reaction, nickel chloride hexahydrate and sodium oxalate generate nickel oxalate precipitate, and ethylene glycol as a morphology control agent can adjust the length-diameter ratio of nickel oxide with different morphologies. According to the invention, the preparation method is low in cost, low in energy consumption, environment-friendly and simple to operate, and has important academic significance and application value; and according tothe result of the embodiment, the method provided by the invention can be used for preparing highly uniform and pure nickel oxide with different morphologies, including tetragonal nickel oxide, quadrangular nickel oxide, spindle-shaped nickel oxide and fibrous nickel oxide.

Description

technical field [0001] The invention relates to the technical field of preparation of micro-nano materials, in particular to a method for preparing nickel oxide with high uniformity. Background technique [0002] In recent years, micro-nanomaterials have attracted the attention of the scientific community due to their unusual physical and chemical properties. These materials have potential applications such as catalysts, drug delivery materials, photonic materials, and battery materials. The morphology and size of micro-nano materials have a great influence on their optical, electronic, magnetic and catalytic properties. [0003] As a p-type wide bandgap semiconductor material, nickel oxide is widely used in photodetectors, gas sensors, photocatalysis, lithium-ion batteries, and solar cells. In recent years, in the morphology synthesis of nickel oxide, nickel oxide nanoparticles, nanoplates, hexagonal nanodisks, nanotubes, nanowires, hollow octahedrons, nanospheres, nanobe...

Claims

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Application Information

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IPC IPC(8): C01G53/04
CPCC01G53/04C01P2002/72C01P2004/03C01P2004/20C01P2004/30C01P2004/38C01P2004/40
Inventor 耿旺昌徐诗露闫毅张秋禹
Owner NORTHWESTERN POLYTECHNICAL UNIV