Zr-MOFs/graphene oxide porous composite material as well as preparation method and application thereof

A porous composite material and graphene technology, applied in the field of porous composite materials, can solve the problems of affecting the hydrogen storage performance of the material, unable to meet the application requirements, less microporous structure, etc., and achieve regular product phase structure, high yield, and improve defects. degree of effect

Pending Publication Date: 2019-11-22
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In the article (Journal of Industrial and Engineering Chemistry 27 (2015) 102–107), Zhong et al. prepared UIO-66/GO composites with a specific surface area of ​​1184m 2 /g, the composite of graphene oxide and UIO-66 increases the specific surface area, but due to the less microporous structure of the material, the specific surface area of ​​the material is not even as

Method used

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  • Zr-MOFs/graphene oxide porous composite material as well as preparation method and application thereof
  • Zr-MOFs/graphene oxide porous composite material as well as preparation method and application thereof
  • Zr-MOFs/graphene oxide porous composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Graphene oxide content is the preparation method of the Zr-MOFs / graphene oxide porous composite material of 2wt%, concrete operation steps are as follows:

[0041] Step 1) Add 0.00798mg graphene oxide, 0.233mg zirconium tetrachloride, 0.166mg terephthalic acid, 3.8mL formic acid (the ratio of zirconium tetrachloride to formic acid is 100:1) into 20mL DMF, ultrasonic , followed by hydrothermal reaction at 120°C for 24 hours, after filtration and washing, the unactivated Zr-MOFs / graphene oxide porous composite material can be obtained;

[0042] Step 2) Soak the unactivated Zr-MOFs / graphene oxide porous composite obtained in step 1) in dichloromethane for three days, change the dichloromethane every 24h, and finally dry it at 120°C for 6h to obtain Zr -MOFs / graphene oxide porous composites;

[0043] The Zr-MOFs / graphene oxide porous composite material prepared in Example 1 was tested for low-temperature nitrogen isothermal adsorption performance. The test conditions were ...

Embodiment 2

[0053] Graphene oxide content is Zr-MOFs / graphene oxide porous composite material of 5wt% of Zr-MOFs, its preparation method does not specify the step and embodiment 1 (graphene oxide content is 2wt% Zr-MOFs / graphene oxide The preparation method of the graphene porous composite material) is the same, the difference is that the mass of graphene oxide weighed in the step 1) is 0.01995 mg.

[0054] The characterization test methods are the same as those in Example 1 above.

[0055] The Zr-MOFs / graphene oxide porous composite material prepared in Example 2 was subjected to a low-temperature nitrogen isothermal adsorption performance test. Test results such as figure 1 As shown in UIO-66-GO-5, the Zr-MOFs / graphene oxide porous composite has a specific surface area of ​​1502 m 2 / g.

[0056] The Zr-MOFs / graphene oxide porous composite material prepared in Example 2 was subjected to a low-temperature nitrogen isothermal adsorption performance test. Test results such as figure 2...

Embodiment 3

[0061] Graphene oxide content is the preparation method of the Zr-MOFs / graphene oxide porous composite material of 10wt%, concrete operation steps are as follows:

[0062] The steps not specifically described are the same as in Example 1 (preparation method of Zr-MOFs / graphene oxide porous composite material with a graphene oxide content of 2wt%), except that the graphene oxide weighed in step 1) The mass is 0.0399 mg.

[0063] The characterization test methods are the same as those in Example 1 above.

[0064] The Zr-MOFs / graphene oxide porous composite material prepared in Example 3 was subjected to a low-temperature nitrogen isothermal adsorption performance test. Test results such as figure 1 As shown in UIO-66-GO-10, the Zr-MOFs / graphene oxide porous composite has a specific surface area of ​​1326 m 2 / g.

[0065] The Zr-MOFs / graphene oxide porous composite material prepared in Example 3 was subjected to a low-temperature nitrogen isothermal adsorption performance tes...

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Abstract

The invention provides a Zr-MOFs/graphene oxide porous composite material. During Zr-MOFs preparation, two template agents with different functions are added at the same time, wherein the template agent A is graphene oxide and has a coordination effect with Zr-MOFs and a carrier function; the template agent B is a functional group with a coordination competition effect, and can remove organic matters by washing after inducing the Zr-MOFs hydrothermal reaction; and the template agent B is an organic matter containing carboxyl. The specific surface area of the composite material is 1326-1602 m<2>/g, and the pore size distribution is 0.2-1.2 nm. The preparation method of the Zr-MOFs/graphene oxide porous composite material comprises the following steps: 1) performing hydrothermal reaction synthesis of the Zr-MOFs/graphene oxide porous composite material; and (2) activating the Zr-MOFs/graphene oxide porous composite material. When the material is applied as a hydrogen storage material, the hydrogen adsorption capacity is 2.5-3.1 wt% under the condition that the adsorption temperature is 77K. The method has the advantages that the experimental process is simple; the hydrogen storage capacity is improved by 24%; the two template agents with different functions are introduced, and the defect degree and the micropore volume of the composite material are improved through competitive coordination.

Description

technical field [0001] The invention relates to the technical field of porous material modification, in particular to using graphene oxide to support Zr-MOFs and modifying with formic acid to prepare a porous composite material, so that it has good hydrogen storage performance. Background technique [0002] With the development of industry and the improvement of people's material living standards, human demand for energy is increasing. Since the energy used in recent decades mainly comes from fossil fuels (such as coal, oil, natural gas, etc.), its use will inevitably pollute the environment, and its reserves are limited, so it is urgent to find renewable green energy. As a green energy and energy carrier with abundant reserves, wide sources and high energy density, hydrogen energy is attracting widespread attention. Therefore, the development of hydrogen storage materials with high performance is one of the key issues facing the field of hydrogen storage. [0003] Metal-o...

Claims

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Application Information

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IPC IPC(8): C01B3/00C01B32/198C01B37/00C01B39/00
CPCC01B3/0078C01B32/198C01B37/00C01B39/00C01P2006/12C01P2006/17C01P2002/72C01P2004/03Y02E60/32
Inventor 孙立贤詹浩徐芬陈沛荣涂德贵汪震越
Owner GUILIN UNIV OF ELECTRONIC TECH
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