Novel MOF composite material and preparation method and application thereof

A composite material, MOF technology, applied in nanotechnology for materials and surface science, hybrid/electric double-layer capacitor manufacturing, hybrid capacitor electrodes, etc., can solve the problems of low yield, high cost, non-uniform structure, etc., Achieve the effect of high yield, low cost and simple preparation process

Active Publication Date: 2017-05-03
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in the currently available MOF materials for energy storage, such as uneven structure, high cost, and low yield.

Method used

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  • Novel MOF composite material and preparation method and application thereof
  • Novel MOF composite material and preparation method and application thereof
  • Novel MOF composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The MOF / MXene composite material that present embodiment makes, selects Ti 3 AlC 2 and 1,4-naphthalene dicarboxylic acid as MAX materials and organic ligand molecules, including the layered MXene material Ti 3 C 2 , and MOF crystals interspersed in the layered structure and the surface of the material with Al as the node and 1,4-naphthalene dicarboxylic acid as the bridge.

[0035] The specific steps are:

[0036] Step 1, MAX material pretreatment: using a ball mill, Ti 3 AlC 2 Ball milling in ethanol, vacuum drying, ball milling and sieving to obtain submicron Ti 3 AlC 2 powder.

[0037] Step 2, generate MOF / MXene nanocomposites by "one-step method": add water, a small amount of HF, excess naphthalene dicarboxylic acid and treated Ti to the reactor 3 AlC 2 powder, hydrothermal at 180°C for 6 hours, under hydrothermal conditions HF etched away Ti 3 AlC 2 metal atom Al in the structure, giving Ti 3 C 2 , and the obtained Al ions react with naphthalene dicarb...

Embodiment 2

[0043] The MOF / MXene composite material that present embodiment makes, selects Ti 2 AlC and 1,3,5-trimesic acid as MAX materials and organic ligand molecules, including MXene material Ti with layered structure 2 C, and MOF crystals interspersed between layered structures with 1,3,5-trimesic acid as nodes and Al as bridges, Figure 5 It is the scanning electron micrograph of the MOF composite material in this example. .

[0044] The specific steps are: Step 1, MAX material pretreatment: using a ball mill, Ti 2 AlC is ball milled in ethanol, vacuum dried and sieved to obtain submicron Ti 2 AlC powder.

[0045] Step 2, generate MOF / MXene nanocomposites by "one-step method": add water, HF, excess 1,3,5-trimesic acid and treated Ti to the reactor 2 AlC powder, hydrothermal at 120°C for 8 hours, HF etched away Ti under hydrothermal conditions 2 Metal atom Al in AlC structure, to get Ti 2 C nanosheet structure, and the obtained Al ions react with 1,3,5-trimesic acid to obtain ...

Embodiment 3

[0048] The MOF / MXene composite material that present embodiment makes, selects Ti 3 AlC 2 and 1,4-naphthalene dicarboxylic acid as MAX materials and organic ligand molecules, including the layered MXene material Ti 3 C 2 , and MOF crystals interspersed in the layered structure and the surface of the material with Al as the node and 1,4-naphthalene dicarboxylic acid as the bridge.

[0049] The specific steps are:

[0050] Step 1, MAX material pretreatment: using a ball mill, Ti 3 AlC 2 Ball milling in ethanol, vacuum drying, ball milling and sieving to obtain submicron Ti 3 AlC 2 powder.

[0051] Step 2, generate MOF / MXene nanocomposites by "one-step method": add water, a small amount of HF, excess naphthalene dicarboxylic acid and treated Ti to the reactor 3 AlC 2 powder, hydrothermal at 200°C for 1 hour, under hydrothermal conditions HF etched away Ti 3 AlC 2 metal atom Al in the structure, giving Ti 3 C 2 , and the obtained Al ions react with naphthalene dicarbo...

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Abstract

The invention belongs to the technical field of composite materials and provides a novel MOF composite material and a preparation method and application thereof. The composite material comprises an MXene layered structure and an MOF crystal structure penetrating the MXene layered structure. According to the material, metal A ions generated by etching an MAX material is directly taken as a metal ion source to react with an added organic ligand to generate MOF crystal through a ''one-step method'', and the final MOF composite material is directly obtained through one-step reaction. The material can be used for the field of lithium batteries and super-capacitors. The method provided by the invention is simple and safe in operation in preparation, short in production period, low in production cost and high in yield, is free of a by-product basically, and can be used for the lithium batteries, the super-capacitors and the like to improve the stored energy and the utilization efficiency.

Description

technical field [0001] The invention belongs to the technical field of composite materials, relates to the preparation and application of organic-inorganic composite materials, and aims to obtain MOF / MXene composite materials, which can be applied to lithium batteries and supercapacitors, and improve the utilization efficiency of stored energy of devices. Background technique [0002] With the development of the global economy, the demand for energy is also increasing, but the traditional fossil energy is about to be exhausted. Moreover, the exploitation of a large amount of fossil energy has brought many problems to geology and the environment. The greenhouse effect caused by the carbon dioxide emitted by the burning of fossil fuels has brought great pressure to the environment in which we live. These have promoted researchers to find new materials and energy conversion methods to break the deadlock in energy. Efficiently converting the chemical energy of fuels into electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/48H01G11/30H01G11/24H01G11/86B82Y30/00
CPCB82Y30/00H01G11/24H01G11/30H01G11/48H01G11/86B01J20/226Y02E60/13
Inventor 李绍周金津吟周琪缘陈立坤胡绅赵丽
Owner NANJING UNIV OF POSTS & TELECOMM
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