MXene-polydopamine composite material and preparation method thereof

A technology of polydopamine and composite materials, which is applied in the field of MXene-polydopamine composite materials and its preparation, can solve problems such as structure and electrical conductivity damage, small interlayer spacing, ions, gas adsorption and transmission obstacles, etc., to improve stability, The effect of avoiding oxidation and increasing the interlayer spacing of MXene nanosheets

Inactive Publication Date: 2018-12-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the exposed metal atoms on the surface of MXene, it is very easy to be oxidized, which destroys the structure and conductivity; in addition, the interlayer spacing of MXene and the MXene film composed of exfoliated MXene nanosheets is small, which is suitable for the adsorption of ions, gases and Transport hinders

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of MXene-polydopamine composite material, comprises the following steps:

[0027] S1, the selective corrosion component is Ti 3 AlC 2 The MAX powder obtained multilayer two-dimensional transition metal carbide (nitride) Ti 3 C 2 T x Nanosheets:

[0028] Ti 3 AlC 2 The MAX powder (referred to as Ti 3 AlC 2 powder), the concentration of hydrofluoric acid is 12mol / L, hydrofluoric acid and Ti 3 AlC 2 The proportion of powder per gram of Ti 3 AlC 2 Add 10 mL of hydrofluoric acid to the powder. Hydrofluoric acid and Ti 3 AlC 2 The mixture of powders was stirred at a preset corrosion temperature of 25°C for 24h, then washed with deionized water and dried to obtain a multilayer two-dimensional transition metal carbide (nitride) Ti 3 C 2 T x Nanosheets. where T is the functional group on the surface of the multilayer MXene, and x is the number of functional groups in the nanosheet.

[0029] S2. Exfoliation of multilayer two-dimensi...

Embodiment 2

[0037] A kind of preparation method of MXene-polydopamine composite material, comprises the following steps:

[0038] S1, selective corrosion composition is Nb 2 MAX powder of AlC yields multilayer two-dimensional transition metal carbide (nitride) oxide Nb 2 CT x Nanosheets:

[0039] Adding components with a particle size of less than 38 μm to hydrofluoric acid as Nb 2 MAX powder of AlC (referred to as Nb 2 AlC powder), hydrofluoric acid concentration is 9mol / L, hydrofluoric acid and Nb 2 The proportion of AlC powder per gram of Nb 2 Add 10 mL of hydrofluoric acid to AlC powder. Hydrofluoric acid and Nb 2 The mixture of AlC powder was stirred at 35°C for 24h at the preset corrosion temperature, then washed with deionized water and dried to obtain a multilayer two-dimensional transition metal carbide (nitride) compound Nb 2 CT x Nanosheets. where T is the functional group on the surface of the multilayer MXene, and x is the number of functional groups in the nanoshee...

Embodiment 3

[0048] A kind of preparation method of MXene-polydopamine composite material, comprises the following steps:

[0049] S1, the selective corrosion component is Ti 2 MAX powder of AlC yields multilayer two-dimensional transition metal carbide(nitride)Ti 2 CT x Nanosheets:

[0050] Add Ti with a particle size of less than 38 μm to the in-situ hydrofluoric acid formed by hydrochloric acid and lithium fluoride 2 MAX powder of AlC (referred to as Ti 2 AlC powder), the concentration of hydrofluoric acid is 6mol / L, hydrofluoric acid and Ti 2 The ratio of AlC powder per gram of Ti 2 Add 10 mL of hydrofluoric acid to AlC powder. In situ hydrofluoric acid and Ti 2 The mixture of AlC powder was stirred at 55°C for 24h at the preset corrosion temperature, then washed with deionized water, and dried to obtain a multilayer two-dimensional transition metal carbide (nitride) Ti 2 CT x Nanosheets. where T is the functional group on the surface of the multilayer MXene, and x is the num...

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Abstract

Provided are an MXene-polydopamine composite material and a preparation method thereof. The composite material is formed by a two-dimensional transition metal carbide (nitride) MXene nanosheet obtained by stripping treatment and polydopamine coated on the surface of the MXene nanosheet. The mass ratio of the two-dimensional transition metal carbide (nitride) MXene nanosheet and the polydopamine is1:0.05-1:1. By means of reduction and encapsulation effects of the polydopamine, the polydopamine is coated on the surface of the two-dimensional transition metal carbide (nitride) MXene nanosheet obtained by the stripping treatment to improve the stability of the MXene nanosheet. At the same time, the support effect of the polydopamine is utilized to increase the interlayer spacing of the MXenenanosheet, and the MXene-polydopamine composite material with high stability and excellent ion and gas storage characteristic is obtained. The preparation steps are simple, and the material is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of new materials and energy environment, in particular to an MXene-polydopamine composite material and a preparation method thereof. Background technique [0002] MXene is a new type of two-dimensional transition metal carbide or nitride, which was first reported by researchers at Drexel University in the United States in 2011. The MXene material family is rich in members, and the general chemical formula of the material is M n+1 x n T x , wherein M is a transition metal element, X is carbon or nitrogen, n is an integer ranging from 1 to 3, T is a surface functional group, and x is the number of functional groups. MXene has both conductivity and hydrophilic properties, so it has excellent application prospects in many fields such as ion storage and energy conversion. However, due to the exposed metal atoms on the surface of MXene, it is very easy to be oxidized, which destroys the structure and conductivity; in ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08K3/14C08K3/28
CPCC08K3/14C08K3/28C08K2201/011C08L79/04
Inventor 凌铮宋永臣王博浩张晓东石常瑞李峰陈乾刘冬蕾赵佳飞杨磊李洋辉
Owner DALIAN UNIV OF TECH
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