Preparation method and application of MOF material with adjustable proton conduction performance

A proton conduction and MOF technology, applied in the field of MOF materials and their preparation, can solve the problems of low-cost production and high price of unfavorable materials, and achieve the effect of accelerating application and promotion and reducing costs.

Active Publication Date: 2020-12-08
QUFU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the commonly used modification method is to modify only the acidic groups in the structure of MOF, and the best effect is the sulfonic acid group, but the commonly used raw material of the sulfonic acid group is 2,5-dicarboxybenzenesulfonic acid monosodium salt Expensive, not conducive to low-cost production of materials

Method used

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  • Preparation method and application of MOF material with adjustable proton conduction performance
  • Preparation method and application of MOF material with adjustable proton conduction performance
  • Preparation method and application of MOF material with adjustable proton conduction performance

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Effect test

Embodiment 1

[0040] A MOF material with adjustable proton conductivity. Organic ligands containing acidic groups and basic groups are introduced into the synthesis solution at the same time, and MOF materials modified with acidic groups and basic groups are synthesized in one step by solvent replacement. , by changing the concentration and ratio of acidic groups and basic groups in MOF materials, the proton conductivity of MOF materials can be further regulated.

[0041] The proton conduction mechanism of the MOF material is as follows: on the one hand, both acidic and basic groups have good hydrophilicity, and form hydrogen bonds with water molecules in the MOF material skeleton to promote dense and continuous hydrogen bonds in the MOF material. Network element generation. On the other hand, acidic groups have strong acidity, and as proton donors, protons are easily dissociated from acidic groups and become the main source of protons transported in pores; dissociated protons jump along th...

Embodiment 2

[0052] A preparation method of MOF material with adjustable proton conductivity,

[0053] UiO-66-(NH 2 )(SO 3 The concrete steps of the preparation method of F)-1:3 are:

[0054] Accurately weigh 0.003mol of zirconium oxychloride octahydrate (ZrOCl 2 ·8H 2 O), 0.00225mol of 2,5-dicarboxybenzenesulfonic acid monosodium salt (BDC-SO 3 Na) and 0.00075mol of 2-aminoterephthalic acid are placed in a beaker, add 30ml N,N-dimethylacetamide (DMA) and stir evenly, add 11.7ml formic acid after the solid is fully dissolved, and transfer the liquid to 100ml polytetrafluoroethylene high-pressure reaction kettle, reacted in an oven at 150°C for 24 hours, and centrifuged the crude product after the mixture was cooled to room temperature. The crude product was washed three times with N,N-dimethylacetamide and acetone respectively, and the product was Place it in a vacuum oven at 80°C for 12 hours to obtain the product UiO-66-(NH 2 )(SO 3 H)-1:3 (1:3 means that the molar ratio of 2-amin...

Embodiment 3

[0057] A preparation method of MOF material with adjustable proton conductivity,

[0058] UiO-66-(NH 2 )(SO 3 The concrete steps of the preparation method of F)-1:2 are:

[0059] Accurately weigh 0.003mol of zirconium oxychloride octahydrate (ZrOCl 2 ·8H 2 O), 0.002mol of 2,5-dicarboxybenzenesulfonic acid monosodium salt (BDC-SO3Na) and 0.001mol of 2-aminoterephthalic acid are placed in a beaker, add 30mlN,N-dimethylacetamide ( DMA) and stir evenly, add 11.7ml of formic acid after the solid is fully dissolved, transfer the liquid to a 100ml polytetrafluoroethylene autoclave after mixing evenly, react in a 150°C oven for 24h, and centrifuge the crude product after the mixture is cooled to room temperature , the crude product was washed three times with N,N-dimethylacetamide and acetone, and the product was dried in a vacuum oven at 80°C for 12 hours to obtain the product UiO-66-(NH 2 )(SO 3 H)-1:2 (1:2 means that the molar ratio of 2-aminoterephthalic acid and 2,5-dicarbo...

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Abstract

The invention relates to the technical field of new energy material development, in particular to a preparation method and application of an MOF material with adjustable proton conduction performance.Organic ligands containing acidic groups and basic groups are introduced into a synthesis solution at the same time, and the MOF material modified with the acidic groups and the basic groups at the same time is synthesized in one step through a solvent replacement method. The proton conduction performance of the MOF material can be further regulated and controlled by changing the concentrations and proportions of acidic groups and basic groups in the MOF material. A one-step synthesis method is adopted, the synthesis reaction steps are simple, the reaction is sufficient, and acid groups and basic groups of the synthesized product are uniformly distributed. Protons jumping in the hydrogen bond network are evenly distributed at intervals through even distribution of the acid groups, jumpingnodes of the protons in the hydrogen bond network are evenly distributed through even distribution of the basic groups at intervals, and therefore even distribution of proton conduction active sitesof the material is guaranteed, and the proton conductivity of the MOF material is effectively improved.

Description

technical field [0001] The invention relates to the technical field of new energy material development, in particular to a MOF material with adjustable proton conductivity and its preparation method and application. Background technique [0002] With the increasingly prominent environmental pressure and energy issues, new energy vehicles have become a research hotspot for major automobile manufacturers and R&D institutions in the world. Fuel cell vehicles are generally considered to have broad development prospects due to their high efficiency and near-zero emissions. Among them, the most influential power source, proton exchange membrane fuel cell (PEMFC), is currently the most mature hydrogen-oxygen synthesis system in the world. A technology that reacts to release electrical energy. In principle, PEMFC is equivalent to the "reverse" device of water electrolysis, which is a kind of clean energy. At present, the most widely used of its key components, the proton exchange ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00H01M8/1048H01M8/1072
CPCC08G83/008H01M8/1048H01M8/1072Y02E60/50
Inventor 郑晓凤王庆辉唐欢赵鑫榆石志康刘哲
Owner QUFU NORMAL UNIV
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