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Ultra-large interlayer spacing molybdenum disulfide/carbon composite material and preparation method of molybdenum disulfide/carbon composite material

A carbon composite material, molybdenum disulfide technology, applied in the field of electrocatalytic hydrogen evolution, can solve the problems of poor electrical conductivity, affecting performance, unable to meet the requirements of high-performance catalysts, etc.

Pending Publication Date: 2020-05-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a semiconductor material, MoS 2 The poor intrinsic conductivity of MoS directly affects the release of its properties. At present, some researchers have used various methods to improve the performance of MoS 2 Conductivity, such as directly compounding with a substrate with excellent conductivity, introducing doping elements, etc.
Although these designs all contribute to MoS to varying degrees 2 The performance improvement of MoS has been improved to a certain extent, but it still cannot meet the requirements of high-performance catalysts. Therefore, for MoS 2 Material modification research still needs to be improved

Method used

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  • Ultra-large interlayer spacing molybdenum disulfide/carbon composite material and preparation method of molybdenum disulfide/carbon composite material
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  • Ultra-large interlayer spacing molybdenum disulfide/carbon composite material and preparation method of molybdenum disulfide/carbon composite material

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preparation example Construction

[0034] The present invention uses a two-step hydrothermal method to prepare dodecylamine-intercalated MoS with large interlayer spacing 2 sheets, MoS under nitrogen atmosphere 2 The complex with dodecylamine is annealed. During the annealing process, dodecylamine is converted into carbon in situ, and finally the MoS 2 While forming carbon particles between the sheets, the MoS 2 layer spacing. Super large interlayer spacing MoS in the present invention 2 The preparation method of / C composite material, comprises the following steps:

[0035] (1) Select sodium molybdate dihydrate and thiourea as reactants, fully mix and evenly disperse the mixed solution, use the autoclave as the container, and use the mixed solution as the reactant to prepare MoS by hydrothermal method 2 solution.

[0036] Mix sodium molybdate dihydrate and thiourea according to a molar ratio of 1:5, add the mixture to deionized water to obtain a mixed solution, and the mixed solution is obtained by stirri...

Embodiment 1

[0047] Add sodium molybdate dihydrate and thiourea with a molar ratio of 1:5 to deionized water, stir evenly and ultrasonically disperse to obtain a mixed solution. The mixed solution is subjected to a hydrothermal reaction at 210°C for 24 hours. After cooling, it is obtained Reaction product MoS 2 solution; the MoS 2 The solution was washed by centrifugation at 6000r / min for 3 times with acetone solution, 8min each time; 3 times with 8000r / min in deionized water, 6min each time; 3 times with 6000r / min in absolute ethanol, Wash for 8 minutes each time; obtain the mixed solution after cleaning, and dry the mixed solution after cleaning at 70°C for 14 hours to obtain MoS 2 powder; in MoS 2 Add 0.1% of its mass dodecylamine to the powder to obtain a mixed powder, dissolve the mixed powder in deionized water to obtain a mixed solution, and hydrothermally react the mixed solution at 80° C. for 8 hours to obtain a liquid reaction product; The product is cleaned and dried, and the...

Embodiment 2

[0049] Add sodium molybdate dihydrate and thiourea with a molar ratio of 1:5 to deionized water, stir evenly and ultrasonically disperse to obtain a mixed solution. The mixed solution is subjected to a hydrothermal reaction at 210°C for 24 hours. After cooling, it is obtained Reaction product MoS 2 solution; the MoS 2 The solution was washed by centrifugation at 8000r / min for 3 times with acetone solution, 6min each time; 3 times with 10000r / min in deionized water, 5min each time; 3 times with 8000r / min in absolute ethanol, Wash for 7 minutes each time; obtain the mixed solution after washing, and dry the mixed solution after washing at 90°C for 10 hours to obtain MoS 2 powder; in MoS 2 Add 0.1% of its mass dodecylamine to the powder to obtain a mixed powder, dissolve the mixed powder in deionized water to obtain a mixed solution, and hydrothermally react the mixed solution at 100° C. for 8 hours to obtain a liquid reaction product; The product is cleaned and dried, and the...

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Abstract

The invention discloses an ultra-large interlayer spacing molybdenum disulfide / carbon composite material and a preparation method thereof. The ultra-large interlayer spacing molybdenum disulfide / carbon composite material is used for improving the efficiency of electro-catalytic hydrogen evolution. According to the method, the ultra-large interlayer spacing MoS2 / interlayer carbon composite materialis synthesized through a two-step hydrothermal reaction, and is carbonized through annealing treatment; MoS2 with ultra-large interlayer spacing is beneficial for transmission of charges and hydrogen; and carbon formed in situ has a very good effect on improvement of a two-dimensional semiconductor material. A technical thought in the invention is simple and clear; and the electro-catalytic hydrogen evolution performance of the composite material is remarkably improved. The invention discloses a technical idea for preparing ultra-large interlayer spacing MoS2 / C by a hydrothermal method.

Description

【Technical field】 [0001] The invention belongs to the field of electrocatalytic hydrogen evolution, and in particular relates to a molybdenum disulfide / carbon composite material with a super-large layer spacing and a preparation method thereof. 【Background technique】 [0002] The warming of the global climate and the sharp reduction of fossil fuels have made people pay more and more attention to the development and utilization of new sustainable energy sources, among which wind energy and solar energy are considered to be the most potential new energy sources. However, both wind energy and solar energy are intermittent and cannot meet the requirements of continuous energy supply in people's daily life. Therefore, the existing energy structure system is increasingly unable to meet the basic requirements of the rapid development of human society. Therefore, expanding and developing new forms of sustainable energy storage and conversion, further increasing the proportion of gre...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J37/10B01J37/08C25B1/04C25B11/06
CPCB01J27/051B01J37/10B01J37/08C25B1/04C25B11/091B01J35/33Y02E60/36
Inventor 王伟
Owner XI AN JIAOTONG UNIV
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