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Preparation method for molybdenum selenide two-dimensional layer titanium carbide composite material

A two-dimensional layered and composite material technology, applied in the direction of electrodes, electrical components, electrolysis process, etc., can solve the problems of low ion mobility, poor conductivity of molybdenum selenide, etc., achieve large specific surface area, easy to control, and convenient for industrial production Effect

Active Publication Date: 2019-03-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problems of poor electrical conductivity and low ion mobility of existing molybdenum selenide, and provides a preparation method of molybdenum selenide two-dimensional layered titanium carbide composite material

Method used

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  • Preparation method for molybdenum selenide two-dimensional layer titanium carbide composite material
  • Preparation method for molybdenum selenide two-dimensional layer titanium carbide composite material

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specific Embodiment approach 1

[0031] Specific implementation manner 1: The preparation method of the molybdenum selenide two-dimensional layered titanium carbide composite material of this embodiment is carried out according to the following steps:

[0032] 1. Mix Se powder and hydrazine hydrate with a mass percentage of 97% to 98% and stir for 12 to 24 hours to obtain a selenium-hydrazine hydrate dispersion;

[0033] The volume ratio of the mole of Se powder to the hydrazine hydrate with a mass percentage of 97% to 98% is (0.8 to 1.3) mmol: 5 mL;

[0034] Second, the MXene-Ti 3 C 2 The dispersion is mixed with cetyltrimethylammonium bromide, stirred for 0.5h~2h under the condition of 30℃~50℃, sodium molybdate is added and stirred for 0.2h~2h to obtain cetyltrimethylammonium bromide Base ammonium bromide solution;

[0035] MXene-Ti 3 C 2 The volume ratio of the dispersion liquid to the mass ratio of cetyltrimethylammonium bromide is (10~50) mL:1g; the MXene-Ti 3 C 2 The molar ratio of the volume of the dispersion ...

specific Embodiment approach 2

[0055] Specific embodiment two: this embodiment is different from specific embodiment one in that the volume ratio of the mole of Se powder to the hydrazine hydrate with a mass percentage of 97%-98% in step one is (0.8-1) mmol: 5mL. Others are the same as the first embodiment.

specific Embodiment approach 3

[0056] Specific embodiment three: this embodiment is different from one of specific embodiments one or two in: MXene-Ti described in step two 3 C 2 The mass ratio of the volume of the dispersion to the mass of cetyltrimethylammonium bromide is (10-40) mL: 1g; the MXene-Ti described in step two 3 C 2 The molar ratio of the volume of the dispersion to the sodium molybdate is (10-12) mL: 1 mmol. Others are the same as the first or second embodiment.

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Abstract

The invention discloses a preparation method for a molybdenum selenide two-dimensional layer titanium carbide composite material, and relates to preparation for a metal carbide / sulfide composite material. The problems that existing molybdenum selenide is poorer in electrical conductivity, and the ion mobility is lower are solved. The method comprises the steps that step one, Se powder and hydrazine hydrate are mixed and stirred, and selenium-hydrazine hydrate dispersion liquid is obtained; MXene-Ti3C2 dispersion liquid and cetyl trimethyl ammonium bromide are mixed, sodium molybdate is added,and a cetyl trimethyl ammonium bromide solution is obtained; step three, the selenium-hydrazine hydrate dispersion liquid and the cetyl trimethyl ammonium bromide solution are subjected to the mixingreaction, and a mixed solution is obtained; step four, the mixed solution is washed by deionized water and ethyl alcohol and centrifuged, vacuum drying is conducted, and the MoSe2@Mxene-Ti3C2 composite material is obtained. The method is used for preparation of the molybdenum selenide two-dimensional layer titanium carbide composite material.

Description

Technical field [0001] The invention relates to the preparation of a metal carbide / sulfide composite material. Background technique [0002] Two-dimensional transition metal carbide (Mxene) has a unique layered structure, excellent electrical conductivity, high electrochemical activity, and large specific surface area. It has great application potential in the fields of electrocatalysis and energy storage. [0003] As one of the transition metal chalcogenides, molybdenum selenide combines weak van der Waals forces between layers, so it can be exfoliated into a two-dimensional graphene-like structure to obtain unique electronic properties different from bulk materials. The active sites exposed at the edges make it electrocatalytically active. The interlayer spacing is large, and some ions are easily inserted between the molybdenum selenide lamellae, so it also has a good energy storage effect. However, its intrinsic conductivity is poor and ion mobility is low, which results in po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B1/04H01M4/62
CPCC25B1/04C25B11/091H01M4/62Y02E60/10Y02E60/36
Inventor 郑晓航杨雅倩苗玲芬李新忠隋解和蔡伟
Owner HARBIN INST OF TECH
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