Manganese dioxide nanowire/titanium carbide composite material and preparation method thereof

A manganese dioxide nanometer and composite material technology is applied in the field of manganese dioxide nanowire/titanium carbide composite materials and their preparation, which can solve the problems of inability to control the structure of composite materials, easy agglomeration, and affecting electrochemical performance.

Inactive Publication Date: 2018-08-03
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 materials, but the MnO obtained by this direct chemical synthesis 2 tend to reunite easily, in Ti 3 C 2 Surface distribution is not uniform, which affects its electrochemical performance
Liu et al. vacuum filtered Ti 3 C 2 with MnO 2 Mixed liquid to obtain flexible composite paper to improve Ti 3 C 2 Pseudocapacitive properties, but this method cannot control the structure of the composite material

Method used

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  • Manganese dioxide nanowire/titanium carbide composite material and preparation method thereof
  • Manganese dioxide nanowire/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 10 mL of 2% (w / w) PEG solution, stir at room temperature for 30 min to completely dissolve PEG in ultrapure water; then, add 30 mg of Ti 3 C 2 Add the @PDA nanopowder into the PEG 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 manganese dioxide nanowire / titanium carbide composite material.

Embodiment 2

[0038] First, prepare 10 mL of 2% (w / w) PEG solution, stir at room temperature for 30 min to completely dissolve PEG in ultrapure water; then, add 30 mg of Ti 3 C 2 Add the @PDA nanopowder into the PEG 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 manganese dioxide nanowire / titanium carbide composite material.

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Abstract

The invention provides a manganese dioxide nanowire / titanium carbide composite material and a preparation method thereof. The preparation method comprises the steps of respectively dispersing Ti3C2 nanometer powder and dopamine hydrochloride in ultrapure water, performing uniform mixing, and performing stirring under a shading condition; adding a Tris-buffer liquid, and continuing to stir under the shading condition; separating, washing and drying the obtained mixed solution to obtain Ti3C2@PDA nanometer powder; adding the Ti3C2@PDA nanometer powder into a PEG solution, adding KMNO4 solution after uniform dispersion, and performing liquid-phase reaction; and naturally cooling after reaction is ended, thereby obtaining the manganese dioxide nanowire / titanium carbide composite material. By the method, uniformly-distributed manganese dioxide nanowires can be formed on a surface of carbon titanium, the obtained composite material has good electrochemical performance, the preparation methodis low in equipment requirement and low in cost and is simple and convenient to operate, and industrial production on a large scale is favorably achieved.

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 nanowire / 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 struct...

Claims

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Application Information

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IPC IPC(8): H01G11/36H01G11/46H01G11/86
CPCY02E60/13H01G11/36H01G11/46H01G11/86
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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