Method for preparing metal organic framework material from dielectric barrier discharge plasma

Abstract

The invention discloses a method for preparing a metal organic framework material from a dielectric barrier discharge plasma. A metal salt and an organic ligand are added into a solvent, the metal salt, the organic ligand and the solvent are mixed and stirred evenly, and dissolved to obtain a reaction solution, the reaction solution is pumped into an inner tube of a dielectric barrier discharge plasma reactor, overflows from the edge of the inner tube lower than an outer tube, forms an even wall-hanging liquid film between the inner tube and the outer tube, and flows downwards slowly; and meanwhile, a working gas is introduced into the inner tube. Driven by a high-frequency high-voltage power supply, the plasma produced because of the discharge between a liquid electrode and a high-voltageelectrode of the outer tube acts on the liquid film flowing between the inner tube and the outer tube, so that the reaction solution reacts for a certain period of time under the action of the plasma, and the metal organic framework material is prepared. The method has the advantages of high synthesis speed, stable and efficient performance, strong adjustability, strong practicality, no secondarypollution and the like, and has a better application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and mainly relates to a method for preparing metal-organic framework materials by dielectric barrier discharge plasma. Background technique [0002] Metal-organic framework materials are a new type of porous coordination functional nanomaterials formed by metals and organic ligands, which is a hot research topic in the fields of coordination chemistry, materials science and crystal engineering. Metal-organic framework materials have the characteristics of ultra-high specific surface area, unique pore structure, pore shape and size, and adjustable chemical environment. They have high adsorption capacity and photocatalytic performance for pollutants in wastewater. [0003] Metal-organic framework materials are synthesized by metal salts and organic ligands in a solvent at medium and low temperatures. The main methods include solvothermal synthesis, stirring synthesis, di...

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Problems solved by technology

Microwave and ultrasonic methods react quickly and are convenient for rapid crystallization and nucleation, but the reaction is not easy to control, and the shape and stability of the product are difficult to control

Electrochemical method is a very unique method for preparing metal-organic framework materials, but the process is relatively complicated and the production intensity is not high

[0004] In view of the above problems, Chinese patent CN 105037404A discloses a method for preparing metal-organic framework materials based on discharge plasma in the liquid phase. However, due to the conductivity of the liquid, the ions in the liquid will participate in the conduction to form an ion flow, so that the It is difficult to establish a plasma, and this method is limited in the sufficient mixing of the reaction solution and the regulation of metal-organic framework materials with different topological structures.

[0005] At present, there is no research or report on the preparation of metal-organic framework materials by using dielectric barrier discharge plasma at home and abroad.

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