Granular manganese dioxide/titanium carbide composite material 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 inability to control the structure of composite materials, easy agglomeration, and affecting electrochemical performance

Active Publication Date: 2018-06-12
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 mater...

Method used

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  • Granular manganese dioxide/titanium carbide composite material and preparation method thereof
  • Granular manganese dioxide/titanium carbide composite material and preparation method thereof

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preparation example Construction

[0024] The preparation method of the present invention comprises the following steps:

[0025] Step 1, ternary layered Ti 3 AlC 2 Preparation of ceramic powder;

[0026] 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

[0036] First, prepare 10mL 100mmolL -1 CTAB solution, stirred at room temperature for 30min to completely dissolve CTAB in ultrapure water; 30mg of Ti 3 C 2 Add @PDA nanopowder into CTAB solution, ultrasonically disperse for 30min, and then stir for 1h; after stirring well, 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 rice grain-shaped manganese dioxide / titanium carbide composite material.

Embodiment 2

[0038] First, prepare 10mL 100mmolL -1 CTAB solution, stirred at room temperature for 30min to completely dissolve CTAB in ultrapure water; 30mg of Ti 3 C 2 Add @PDA nanopowder into CTAB solution, ultrasonically disperse for 30min, and then stir for 1h; after stirring well, 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 rice grain-shaped manganese dioxide / titanium carbide composite material.

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Abstract

The invention provides a granular manganese dioxide/titanium carbide composite material and a preparation method thereof. The method includes: respectively dispersing Ti3C2 nanopowder and dopamine hydrochloride into ultrapure water, well mixing, and stirring under a shading condition; adding Tris- buffer solution, and continuing stirring under the shading condition; subjecting obtained mixed solution to separation, washing and drying to obtain Ti3C2@PDA nanopowder; adding the Ti3C2@PDA nanopowder into CTAB solution, uniformly dispersing, adding KMnO4 solution, and performing liquid phase reaction; naturally cooling after reaction to obtain the granular manganese dioxide/titanium carbide composite material. By adoption of the method, granular manganese dioxide in uniform distribution can beformed on the surface of titanium carbide, and the obtained composite material is great in electrochemical performance. The preparation method is low in equipment requirement, convenient and simple in operation, low in cost and beneficial to 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 rice granular manganese dioxide / 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 s...

Claims

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Application Information

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IPC IPC(8): C01G45/02C01B32/921
CPCC01G45/02C01P2002/72C01P2004/03C01P2004/61C01P2004/80C01P2006/40
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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