MnO2 nanosheet/TiC composite and preparation method thereof

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...

AI Technical Summary

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

Images