MnO2 nanosheet/TiC composite and preparation method thereof

A technology of manganese dioxide and composite materials, applied in the direction of manganese oxide/manganese hydroxide, titanium carbide, carbide, etc., can solve the problems of affecting electrochemical performance, inability to control the structure of composite materials, and uneven surface distribution

Inactive Publication Date: 2018-06-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Tang et al. 3 C 2 Nanomaterials as the matrix, MnO prepared by liquid phase precipitation and heat treatment 2 -Ti 3 C 2 nanocomposites, where MnO 2 It is granular, and it is used in electrochemical capacitors, but its specific capacity is small
Deposition of ε-MnO on MXene sheets by chemical synthesis by Rakhi et al. 2 Nano-whiskers to improve the specific capacity of MXene material

Method used

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  • MnO2 nanosheet/TiC composite and preparation method thereof
  • MnO2 nanosheet/TiC composite and preparation method thereof

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preparation example Construction

[0022] The preparation method of the present invention comprises the following steps:

[0023] Step 1, ternary layered Ti 3 AlC 2 Preparation of ceramic powder;

[0024] Synthesize ternary layered Ti according to the method of patent ZL201310497696.9 3 AlC 2 The preparation steps of the ceramic powder specifically include: firstly, mixing the experimental raw materials TiC, Ti, and Al powder according to the molar ratio of TiC:Ti:Al=2.0:1.0:1.2; secondly, mixing the mixture, alumina balls Alumina and absolute ethanol are ball milled in a corundum ball milling tank according to the mass ratio of 1:3:1, in which absolute ethanol is used as a ball milling aid, alumina balls are used as a grinding medium, the speed of the ball mill is 300r / min, and the wet ball milling is 4h Finally, dry in a constant temperature drying oven at 40°C for 24 hours; then, put the dried mixture into a corundum crucible, and carry out vacuum pressureless sintering in a vacuum hot-pressed carbon tub...

Embodiment 1

[0034] First, 30mg of Ti 3 C 2 @PDA nanopowder, add to 10mL ultrapure water, ultrasonically disperse for 30min; then, add 10mL of 50mmolL -1 KMnO 4 The solution was heated in a water bath at 70° C., stirred and reacted for 3 hours; after the reaction was completed, it was naturally cooled to obtain a manganese dioxide nanosheet / titanium carbide composite material.

Embodiment 2

[0036] First, 30mg of Ti 3 C 2 @PDA nanopowder, add to 10mL ultrapure water, ultrasonically disperse for 30min; then, add 10mL of 100mmolL -1 KMnO 4 The solution was heated in a water bath at 70° C., stirred and reacted for 3 hours; after the reaction was completed, it was naturally cooled to obtain a manganese dioxide nanosheet / titanium carbide composite material.

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Abstract

The invention provides a MnO2 nanosheet/TiC composite and a preparation method thereof. The method comprises the following steps: dispersing Ti3C2 nanopowder and dopamine hydrochloride in ultrapure water respectively, performing mixing evenly, and performing stirring under the shading condition; adding a Tris-buffer solution, and performing stirring continuously under the shading condition; performing separating, water washing and drying on the obtained mixed solution to obtain Ti3C2@PDA nano-powder; adding the Ti3C2@PDA nano-powder to ultrapure water, and adding a KMnO4 solution after uniformdispersing for liquid phase reaction; performing cooling naturally after the reaction is finished to obtain the MnO2 nanosheet/TiC composite. With the method, uniformly distributed MnO2 nanosheets can be formed on the surface of TiC, and the preparation method has low equipment requirement, is simple to operate and low in cost, and facilitates industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer functional materials, and in particular relates to a manganese dioxide nanosheet / titanium carbide composite material and a preparation method thereof. Background technique [0002] In recent years, the discovery of a class of materials known as MXenes has expanded the family of two-dimensional materials, known as transition metal carbides or carbonitrides, which are structurally similar to graphene. MXene materials can be obtained by removing the A-layer elements in the MAX phase of its precursor by etching, and keeping the original MX structure unchanged, such as Ti 3 C 2 、Ti 2 C et al. Due to its high conductivity, large specific surface area, multilayer structure, good chemical stability and environmental friendliness, MXene has great application potential in the fields of lithium-ion batteries, supercapacitors, photocatalysis and sensors. However Ti 3 C 2 The sheet struc...

Claims

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Application Information

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IPC IPC(8): C01G45/02C01B32/921B82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/46H01M4/36H01M4/505H01M4/58H01M4/62H01M10/0525
CPCB82Y30/00B82Y40/00C01G45/02C01P2002/72C01P2004/03C01P2004/62H01G11/24H01G11/30H01G11/46H01M4/362H01M4/505H01M4/58H01M4/62H01M10/0525Y02E60/10
Inventor 朱建锋李学林王雷武文玲方园张佩卫丹王芬
Owner SHAANXI UNIV OF SCI & TECH
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