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Method for preparing double-metal MOFs material through metal replacement aided by steam

An auxiliary metal and bimetal technology, which is applied in separation methods, chemical instruments and methods, and other chemical processes, etc., can solve the problems that the selective oxygen adsorption performance cannot be fully exerted and the exchange capacity is low.

Active Publication Date: 2016-12-14
TAIYUAN UNIV OF TECH
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Problems solved by technology

The results of simulation calculations also show that the combination of Mn-Cu has higher O 2 / N 2 Selectivity, but due to the low exchange capacity of metal Mn (Mn / Cu=7 / 93), it cannot fully exert the performance of selectively adsorbing oxygen. How to improve the metal exchange capacity will be the final preparation of bimetallic functional MOFs materials. The essential

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  • Method for preparing double-metal MOFs material through metal replacement aided by steam
  • Method for preparing double-metal MOFs material through metal replacement aided by steam
  • Method for preparing double-metal MOFs material through metal replacement aided by steam

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Embodiment Construction

[0024] In order to describe the present invention in detail, the preparation method of the present invention will be described below in combination with specific experimental procedures.

[0025] Chemical substance material: Cu-BTC namely HKUST-1 is purchased directly by reagent company (BASF company production), anhydrous manganese chloride and N, N dimethylformamide (DMF), its combined preparation dosage is as follows: in grams, Milliliters are units of measurement.

[0026] Cu-BTC C 18 h 6 Cu 3 o 12 0.1g (0.17mmol)

[0027] Anhydrous Manganese Chloride MnCl 2 0.043g (0.34mmol)

[0028] N,N Dimethylformamide (DMF) C 3 h 7 NO 3mL (19.5mmol)

[0029] The method for preparing bimetallic Mn-Cu-MOFs material by DMF steam-assisted metal Mn replacement, the steps are:

[0030] (1) Grinding Cu-BTC and anhydrous manganese chloride (0.34 / 0.17=2.0Mn / Cu-BTC)

[0031] Weigh 0.1g±0.001g of Cu-BTC, put it into an agate mortar, grind it for 5 minutes, and set aside; weigh 0.043...

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Abstract

The invention relates to the field of preparation of a double-metal MOFs material and particularly relates to a method for preparing a double-metal MOFs material by exchanging single-metal Cu-MPFs with metal Mn under aid of steam. Through a solvent-free solid-phase synthesis method for synthesizing a developed steam phase based on an MOFs material, the exchange environment is changed; the coordination balance between original metal and organic ligands is further broken; through the adoption of in-situ solid-phase exchange via a steam phase method, the replacement quantity of metal Mn of Cu-BTC is gradually increased; through replacement of MOFs material by the metal under aid of the steam phase method, the replacement quantity of metal Mn is increased; selective increase of oxygen adsorption is directly related to the level of the replacement quantity; when the ratio of Mn to Cu is less than 17 / 83, the oxygen adsorption quantity is lower than that of nitrogen; conversely, after the Mn replacement quantity is increased, the adsorption quantity of oxygen and the adsorption quantity of nitrogen generate inversion, namely the adsorption quantity of oxygen is higher than that of nitrogen.

Description

technical field [0001] The invention relates to the field of preparation of bimetallic MOFs materials, in particular to a method for preparing bimetallic Mn-Cu-MOFs materials by exchanging monometallic Cu-MOFs with steam-assisted metal Mn. Background technique [0002] The continuous emergence of new functional materials has not only attracted the attention of many scientific researchers but also promoted the progress and development of the chemical industry. Porous metal-organic frameworks (Metal-organic Frameworks, MOFs) materials have large specific surface area, uniform pore size, and diverse The excellent properties such as tunable structure make it have potential applications in the fields of catalysis, gas storage and separation, molecular recognition, ion exchange, opto-electromagnetic and so on. Usually, MOFs materials are composed of single-metal or multi-metal clusters as the center, and the structure is formed with carboxylic acid or multi-dentate nitrogen-contai...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01J20/226
Inventor 杨江峰李晋平贾晓霞元宁陈杨
Owner TAIYUAN UNIV OF TECH
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