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Method for repairing copper base-metal organic framework porous material

A metal-organic framework and porous material technology, which is applied in the field of repairing copper-based-metal-organic framework porous materials, can solve problems such as consumption of large ethanol solvent, etc., and achieve the effects of favorable adsorption, high porosity and large BET specific surface area.

Active Publication Date: 2015-05-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

G.Majano et al. (G.Majano, et al., Solvent-Mediated Reconstruction of the Metal–Organic Framework HKUST-1(Cu3(BTC)2).Advanced Functional Materials, 2014,24,3855–3865) adopted the solution soaking method To repair the collapsed HKUST-1 porous metal-organic framework material, that is, soak and stir in ethanol for 1 hour, the BET specific surface area of ​​the material can be restored to 56% of the new HKUST-1 material after drying. This method is simple to operate, but consumes a lot of Ethanol solvent (amount 40mL / g)

Method used

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  • Method for repairing copper base-metal organic framework porous material
  • Method for repairing copper base-metal organic framework porous material
  • Method for repairing copper base-metal organic framework porous material

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Embodiment 1

[0029] The method for repairing copper-based-metal organic framework porous materials in the present invention is effective for all copper-based-metal organic framework porous materials whose skeleton structure is destroyed and loses their original adsorption performance. In order to facilitate comparison and description of the effect of the method for repairing copper-based metal-organic framework porous materials described in the present invention, Example 1 provides a copper-based-metal-organic framework porous material prepared according to a conventional method and a copper-based metal-organic framework with a collapsed structure. The organic framework porous material, the specific preparation method is as follows:

[0030] (1) Preparation of Cu-based-MOF porous material: 2.404g Cu(CH 3 COO) 2 ·H 2 O and 1.608g of 1,3,5-benzenetricarboxylic acid were put into a stainless steel ball mill jar, added stainless steel ball mill beads, put into a QM-3C high-speed vibration ba...

Embodiment 2

[0033] A method for repairing copper-based-metal-organic-framework porous materials, comprising the steps of:

[0034] (1) Weigh 0.25 g of the structurally collapsed copper-based metal-organic framework porous material HK-D of Example 1 and place it in a stainless steel ball mill tank, add methanol dropwise at a ratio of 1.2 mL / g, add stainless steel ball mill beads, and put Put it into the QM-3C high-speed vibrating ball mill, then set the rotating speed of the ball mill to 1200r / min (36.60Hz), and ball mill for 10min to obtain a blue solid powder;

[0035] (2) The blue solid powder was vacuum-dried at 140° C. for 5 h to obtain a repaired copper-based metal-organic framework porous material.

Embodiment 3

[0037] A method for repairing copper-based-metal-organic-framework porous materials, comprising the steps of:

[0038] (1) Weigh 0.25 g of the structurally collapsed copper-based metal-organic framework porous material HK-D of Example 1 and place it in a stainless steel ball mill tank, add ethanol dropwise at a ratio of 2 mL / g, add stainless steel ball mill beads, and put In the QM-3C high-speed vibration ball mill, then set the speed of the ball mill to 1100r / min (44.73Hz), and ball mill for 30min to obtain a blue solid powder;

[0039] (2) The blue solid powder was vacuum-dried at 150° C. for 8 hours to obtain a repaired copper-based metal-organic framework porous material.

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Abstract

Belonging to the technical field of metal organic skeleton materials, the invention discloses a method for repairing a copper base-metal organic framework porous material. The method includes the steps of: putting a structure collapsed copper base-metal organic framework porous material into a ball mill, and adding a repair solvent to conduct ball milling; after ball milling, taking out the solid material and performing drying, thus obtaining the repaired copper base-metal organic framework porous material. The copper base-metal organic framework porous material obtained by the repairing method provided by the invention has a BET specific surface area restored to 95% of a new HKUST-1 material, and adsorption capacity restored to 92% of the new HKUST-1 material. The repairing process of the method provided by the invention only needs adding of trace solvent, and has the characteristics of rapid repairing and simple operation, thus being an efficient and economical novel green repairing method.

Description

technical field [0001] The invention belongs to the technical field of metal organic framework materials, and in particular relates to a method for repairing copper-based-metal organic framework porous materials. Background technique [0002] Metal Organic Frameworks (MOFs for short) are mainly zeolite-like framework materials with special pore structure self-assembled by multi-dentate organic ligands containing oxygen, nitrogen, etc. and transition metal ions. , High pore volume, adjustable pore structure, composition and functional design, etc., which are incomparable to traditional porous materials, make them show great potential application prospects in gas storage, adsorption separation and catalysis. [0003] MOFs materials are mainly composed of metal ions and organic ligands through coordination self-assembly, and the coordination bond energy is 10-200kJ·mol -1 , much smaller than covalent bonds and ionic bonds (generally 200-1000kJ·mol -1 ). Under actual working ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F1/08B01J20/22B01J20/34
CPCB01J20/226B01J20/34C07F1/08
Inventor 夏启斌孙雪娇李忠李浩李玉洁陈永伟
Owner SOUTH CHINA UNIV OF TECH
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