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A kind of preparation method of molybdenum selenide two-dimensional layered titanium carbide composite material

A two-dimensional layered and composite material technology, applied in structural parts, electrolytic components, electrolytic processes, etc., can solve the problems of poor conductivity and low ion mobility of molybdenum selenide

Active Publication Date: 2020-07-07
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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  • A kind of preparation method of molybdenum selenide two-dimensional layered titanium carbide composite material
  • A kind of preparation method of molybdenum selenide two-dimensional layered titanium carbide composite material

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specific Embodiment approach 1

[0031] Embodiment 1: In this embodiment, a method for preparing a molybdenum selenide two-dimensional layered titanium carbide composite material is carried out according to the following steps:

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

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

[0034] Second, the MXene-Ti 3 C 2 Mix the dispersion with cetyltrimethylammonium bromide, stir for 0.5h to 2h at a temperature of 30°C to 50°C, add sodium molybdate and stir for 0.2h to 2h to obtain hexadecyltrimethylammonium bromide ammonium bromide solution;

[0035] The MXene-Ti 3 C 2 The mass ratio of the volume of dispersion liquid and cetyltrimethylammonium bromide is (10~50) mL:1g; Described MXene-Ti 3 C 2 The molar ratio of the volume of dispersion liquid to sodium molybdate is (10~15)m...

specific Embodiment approach 2

[0055] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the molar and mass percentage of the Se powder described in the step one is that the volume ratio of hydrazine hydrate of 97%~98% is (0.8~1) mmol: 5mL. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0056] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the MXene-Ti described in step two 3 C 2 The mass ratio of the volume of dispersion liquid and cetyltrimethylammonium bromide is (10~40) mL:1g; The MXene-Ti described in step 2 3 C 2 The molar ratio of the volume of the dispersion to sodium molybdate is (10-12) mL:1 mmol. Others are the same as in 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 carbides (Mxene) have a unique layered structure, excellent electrical conductivity, high electrochemical activity, and large specific surface area, and have great application potential in the fields of electrocatalysis and energy storage. [0003] As one of the transition metal chalcogenides, molybdenum selenide is bound by weak van der Waals force between layers, so it can be exfoliated into a two-dimensional graphene-like structure, thereby obtaining unique electronic properties different from bulk materials. The exposed active sites at its edge endow it with electrocatalytic activity. And its interlayer spacing is relatively large, and some ions are easily inserted between the sheets of molybdenum selenide, so it also has a good energy storage effect. However, its intrinsic conductivity is poor and...

Claims

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Application Information

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