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Preparation method for petal-shaped molybdenum disulfide hollow mesoporous carbon sphere by in-situ growth

A hollow mesoporous, in-situ growth technology, used in secondary batteries, electrochemical generators, nanotechnology for materials and surface science, etc., can solve problems such as poor semiconductor conductivity, achieve excellent performance, high yield, Simple and environmentally friendly process

Inactive Publication Date: 2018-01-16
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since molybdenum disulfide has a multilayer stacked structure, the intercalation of lithium ions will cause changes in volume or structure, and molybdenum disulfide is a semiconductor with poor conductivity.

Method used

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  • Preparation method for petal-shaped molybdenum disulfide hollow mesoporous carbon sphere by in-situ growth
  • Preparation method for petal-shaped molybdenum disulfide hollow mesoporous carbon sphere by in-situ growth
  • Preparation method for petal-shaped molybdenum disulfide hollow mesoporous carbon sphere by in-situ growth

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1. Preparation of hollow mesoporous carbon nanospheres:

[0030] Add 15 mL of absolute ethanol, 3 mL of deionized water, and 0.3 mL of ammonia water into a beaker and perform magnetic stirring, then add 0.3 mL of ethyl orthosilicate to the above mixture, and magnetically stir the mixture for a period of time. Weigh 100 mg resorcinol and 100 mg formaldehyde and add them to the above mixed solution in turn, and react with magnetic stirring for 24 h. After the reaction was completed, it was centrifuged and washed to obtain a solid phase and then dried. Under the protection of argon, the dried product was calcined at 500 °C for 24 hours at a heating rate of 1 °C / min, and then the calcined product was placed in a water bath at 50 °C Etched with 1 M sodium hydroxide solution for 24 h. Finally, the etched product is centrifuged and washed, and the obtained solid phase is dried to obtain hollow mesoporous carbon nanospheres.

[0031] According to the measurement formula, the ...

Embodiment 2

[0035] 1. Preparation of hollow mesoporous carbon nanospheres:

[0036]Add 30 mL of absolute ethanol, 15 mL of deionized water, and 3 mL of ammonia water into a beaker and perform magnetic stirring. At the same time, add 0.3 mL of ethyl orthosilicate to the above mixture, stir the mixture for a period of time, and weigh 100 mg resorcinol and 500 mg formaldehyde were sequentially added to the above mixed solution, and the reaction was carried out by magnetic stirring for 24 h. After the reaction was completed, it was centrifuged and washed to obtain a solid phase and then dried. Under the protection of argon, the dried product was calcined at 700 °C for 5 h at a heating rate of 2 °C / min, and then the calcined product was placed in a 70 °C water bath. Etched with 1.5 M sodium hydroxide solution for 18 h. Finally, the etched product is centrifuged and washed, and the obtained solid phase is dried to obtain hollow mesoporous carbon nanospheres.

[0037] The obtained hollow mesop...

Embodiment 3

[0041] 1. Preparation of hollow mesoporous carbon nanospheres:

[0042] Add 120 mL of absolute ethanol, 30 mL of deionized water, and 6 mL of ammonia water into a beaker and perform magnetic stirring. At the same time, add 0.3 mL of tetraethyl orthosilicate to the above mixture, stir the mixture for a period of time, and weigh 100 mg resorcinol and 1000 mg formaldehyde were sequentially added to the above mixed solution, and the reaction was performed with magnetic stirring for 24 h. Centrifuge and wash after the reaction is completed, obtain the solid phase and then dry it. Under the protection of argon, the dried product is calcined at 800 °C for 2 hours at a heating rate of 5 °C / min, and then the calcined product is placed in a water bath at 90 °C. Etched with 2 M sodium hydroxide solution for 12 h. Finally, the etched product is centrifuged and washed, and the obtained solid phase is dried to obtain hollow mesoporous carbon nanospheres.

[0043] The obtained hollow mesop...

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Abstract

The invention relates to a preparation method for a petal-shaped molybdenum disulfide hollow mesoporous carbon sphere by in-situ growth, and belongs to the technical field of nanometer material production. The preparation method comprises the steps of mixing ethanol, deionized water, ammonia water, tetraethyl orthosilicate, resorcinol and formaldehyde for reaction; drying a solid phase and performing calcination in argon; etching the solid phase with a sodium hydroxide solution to obtain the solid phase, and drying the solid phase to obtain the hollow mesoporous carbon nanometer sphere; mixingsodium molybdate dihydrate, thiourea and the hollow mesoporous carbon nanometer sphere for hydrothermal reaction, performing centrifugal washing after hydrothermal reaction, drying the solid phase, and performing high-temperature calcination under protection of argon atmosphere to obtain the petal-shaped molybdenum disulfide hollow mesoporous carbon sphere by in-situ growth. The preparation method has the advantages that the raw material is low in cost, the process is environmental-friendly, high yield is achieved, and the prepared petal-shaped molybdenum disulfide hollow mesoporous carbon sphere by in-situ growth can be used as a lithium ion battery electrode material, a photocatalytic material or an electrocatalytic material.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial production, in particular to the synthesis of egg yolk-eggshell structure MoS by in-situ growth of petal-like molybdenum disulfide in hollow mesoporous carbon spheres 2 @C nanosphere approach. Background technique [0002] Among transition metal sulfides, layered molybdenum disulfide (MoS 2 ) is a graphite-like structure material with a unique sandwich-type layered structure. Mo atomic layers are sandwiched between two layers of S atoms. The covalent atoms between the layers are combined by weak van der Waals forces. The gaps between atomic layers can be It allows the intercalation reaction of foreign reactants, and has a large theoretical capacity as the negative electrode of lithium-ion batteries. Widely used in solid lubricant materials, catalysis, hydrogen storage materials, lithium ion electrode materials, etc. Since the properties of nanostructures depend on their size, shape, crysta...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M4/62H01M10/0525B82Y30/00
CPCY02E60/10
Inventor 陈铭张秀娥姜晖曹圣平赵荣芳陆俊杰朱凌云
Owner YANGZHOU UNIV
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