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Method for quickly preparing metal-organic framework films at room temperature with hydroxide nanowires and organic ligands

A metal-organic framework and hydroxide technology, applied in organic chemistry and other directions, can solve the problems of difficulty in large-area production machine application, inability to perform at room temperature, long production cycle, etc., and achieve large-scale promotion, rapid preparation, low cost effect

Inactive Publication Date: 2015-07-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many disadvantages in these methods: firstly, these methods need to be carried out in an environment of 120°C and above, and cannot be carried out at room temperature; secondly, the production cycle of these methods is longer, generally ranging from 2 to 7 days ; Again, the production cost of these methods is higher, it is difficult to apply in large-scale production machine

Method used

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  • Method for quickly preparing metal-organic framework films at room temperature with hydroxide nanowires and organic ligands
  • Method for quickly preparing metal-organic framework films at room temperature with hydroxide nanowires and organic ligands
  • Method for quickly preparing metal-organic framework films at room temperature with hydroxide nanowires and organic ligands

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Effect test

Embodiment 1

[0029] 1) Under magnetic stirring, add 1.4 mM ethanolamine aqueous solution to the same volume of 4 mM copper nitrate aqueous solution. After 1 minute, slow down the stirring speed, and seal the reaction vessel. After 24 hours, a copper hydroxide nanowire solution is obtained. 30 ml of copper hydroxide nanowire solution is directly filtered to form a 300nm thick filter layer on the porous alumina membrane as the nanowire layer. The diameter of the porous alumina membrane is 2.5 cm, the pore diameter is 200 nm, and the porosity is 25-50%;

[0030] 2) Add the obtained nanowire layer to 10ml of trimesic acid solution with a concentration of 10mM and ethanol as a solvent, and react at room temperature for 30 minutes to obtain a metal-organic framework film with a thickness of about 600nm; see figure 2 .

Embodiment 2

[0032] 1) Under magnetic stirring, add 1.4 mM ethanolamine aqueous solution to the same volume of 4 mM copper nitrate aqueous solution. After 1 minute, slow down the stirring speed, and seal the reaction vessel. After 24 hours, a copper hydroxide nanowire solution is obtained. 60 ml of copper hydroxide nanowire solution is directly filtered to form a 600nm thick filter layer on the porous alumina membrane as the nanowire layer. The diameter of the porous alumina membrane is 2.5 cm, the pore diameter is 200 nm, and the porosity is 25-50%;

[0033] 2) Add the obtained nanowire layer to 20ml of trimesic acid solution with a concentration of 10mM and ethanol as a solvent, and react at room temperature for 30 minutes to obtain a metal organic framework film with a thickness of 3 μm; see image 3 .

Embodiment 3

[0035] 1) Under magnetic stirring, add 1.4 mM ethanolamine aqueous solution to the same volume of 4 mM copper nitrate aqueous solution. After 1 minute, slow down the stirring speed, and seal the reaction vessel. After 24 hours, a copper hydroxide nanowire solution is obtained. 60 ml of copper hydroxide nanowire solution is directly filtered to form a 600nm thick filter layer on the porous alumina membrane as the nanowire layer. The diameter of the porous alumina membrane is 2.5 cm, the pore diameter is 200 nm, and the porosity is 25-50%;

[0036] 2) Add the obtained nanowire layer to 20ml of a trimesic acid solution with a concentration of 10mM and a solvent of octanol, and react at room temperature for 30 minutes to obtain a metal-organic framework film with a thickness of 2 μm; see Figure 4 .

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Abstract

The invention discloses a method of rapidly preparing a metal organic framework material thin-film from hydroxide nanowires and organic ligands under a normal temperature. The method comprises (1) adding an ethanolamine aqueous solution into cupric nitrate, zinc nitrate or cadmium nitrate aqueous solution of a same volume under magnetic stirring, slowing down a stirring speed to obtain corresponding copper hydroxide, zinc hydroxide or cadmium hydroxide nanowire solution, and directly filtering the nanowire solution through a porous alumina film to form a nanowire layer; (2) adding the nanowire layer into an organic ligand solution with ethanol, octanol or N,N-dimethyl formamide as a solvent, and reacting for 30 minutes under the normal temperature to obtain the metal organic framework material thin-film. The method provided by the invention can directly prepare large-area compact thin-film on a porous substrate under the normal temperature, and the method is simple in operation steps, low in cost, and environmental-protective. Reaction residues can be easily recovered. The prepared thin-film can stably exist. The method expands an application range of the metal organic framework material thin-film.

Description

technical field [0001] The invention relates to a method for preparing a microporous film, in particular to a method for preparing a metal-organic framework film at normal temperature with hydroxide nanowires and organic ligands. technical background [0002] Due to their high porosity and good chemical stability, metal-organic framework films have good application prospects in many fields such as adsorption and separation, catalytic reactions, drug carriers and optical materials. At present, there are many methods for the preparation of metal-organic framework thin films, including traditional solvothermal method, layer-by-layer growth method, sol-gel method, colloid deposition method, and relatively novel microwave synthesis method and electrochemical synthesis method. However, there are still many disadvantages in these methods: firstly, these methods need to be carried out in an environment of 120°C and above, and cannot be carried out at room temperature; secondly, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F19/00
Inventor 彭新生毛祎胤曹玮李军伟金贤达
Owner ZHEJIANG UNIV