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A method for preparing various metal-organic frameworks in an aqueous solvent system

A metal-organic framework and water solvent technology, which is applied in the field of preparation of various metal-organic frameworks in water solvent systems, can solve the problems of endangering the health of experimenters, increasing costs, environmental damage, etc., and achieves a simple and controllable preparation method with high universal applicability Sexuality and cost reduction effect

Active Publication Date: 2020-07-28
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of metal-organic framework materials reported so far involves the use of organic solvents, such as ethanol, dimethylformamide, etc. The use of these organic solvents increases the cost of experiments and practical applications on the one hand, and on the other hand It has caused certain damage to the environment and endangered the health of experimenters to a certain extent. Therefore, how to prepare metal-organic framework materials in a green and environmentally friendly way is becoming increasingly important.

Method used

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  • A method for preparing various metal-organic frameworks in an aqueous solvent system
  • A method for preparing various metal-organic frameworks in an aqueous solvent system
  • A method for preparing various metal-organic frameworks in an aqueous solvent system

Examples

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preparation example Construction

[0028] (2) Preparation of metal-organic framework materials

[0029] Weigh 0.2441-1.7544g metal salt and dissolve it in 20-100ml deionized water, then add it into the aqueous solution in which trimesic acid is dissolved in step (1), heat and stir in an oil bath, wherein the oil bath heating temperature is 60-150 ℃, stirring time 10s-60min, then take it out, wash it with ethanol and deionized water alternately, and dry it in an oven to obtain the metal organic framework material.

[0030] The metal salts in the step (2) include manganese acetate, cerium nitrate, nickel acetate, cobalt acetate, copper nitrate and other metal salts.

Embodiment 1

[0033] (1) Dissolution of trimesic acid in water

[0034] Weigh 0.4286g of trimesic acid and add it to 50mL of deionized water, heat and stir in an oil bath at 80°C until all trimesic acid is dissolved in water;

[0035] (2) Preparation of Mn-BTC

[0036] Weigh 0.4951g of manganese acetate and dissolve it in 50mL of deionized water, then add it into the aqueous solution dissolved with trimesic acid, heat and stir at 80°C for 30min, then take it out and wash it alternately with ethanol and deionized water, and the centrifugal speed is 3500rpm, Centrifuge for 3 minutes, repeat 6 times, and dry in an oven at 80°C for 12 hours to obtain Mn-BTC.

Embodiment 2

[0038] (1) Dissolution of trimesic acid in water

[0039] Weigh 0.4286g of trimesic acid and add it to 50mL of deionized water, heat and stir in an oil bath at 80°C until all trimesic acid is dissolved in water;

[0040] (2) Preparation of Ce-BTC

[0041] Weigh 0.8772g of cerium nitrate and dissolve it in 50mL of deionized water, then add it into the aqueous solution dissolved with trimesic acid, heat and stir at 80°C for 20s, take it out and wash it with ethanol and deionized water alternately, and the centrifugal speed is 3500rpm. The time is 3 minutes, repeated 6 times, and oven-dried at 80° C. for 12 hours to obtain Ce-BTC.

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Abstract

The invention discloses a method used for preparing a plurality of metal organic frameworks using a hydrosolvent system. The method comprises following steps: 1, trimesic acid is dissolved in water, wherein 0.2143 to 0.8571g of trimesic acid is added into 20 to 100ml of deionized water, an obtained mixture is subjected to oil bath heating and stirring until trimesic acid is completely dissolved inwater; 2, the metal organic frameworks are prepared, wherein 0.2441 to 1.7544g of a metal salt is dissolved in 20 to 100ml of deionized water, a trimesic acid aqueous solution obtained in the step 1is added, an obtained mixed material is subjected to oil bath heating stirring, an obtained product is collected, is subjected to washing and centrifugation with ethanol and deionized water alternatively, and is dried in a drying oven so as to obtain the metal organic frameworks. Operation of the method is simple; the chemical bath experimental process is convenient for controlling and observation; large scale product is convenient to realize; the metal organic frameworks can be taken as precursors in preparation of metal oxides, porous carbon, and mixtures of metal oxides and porous carbon; and application prospect in the fields such as energy storage, sensing, catalysis, and gas adsorption is promising.

Description

technical field [0001] The invention belongs to the technical field of synthesizing metal-organic frameworks of functional materials, in particular to a method for preparing various metal-organic frameworks in an aqueous solvent system. Background technique [0002] In recent years, metal-organic frameworks have attracted more and more attention due to their large specific surface area, high porosity, and plastic organic ligands, and they can be used as precursors to prepare porous metal oxides, carbon materials, and metals. Composites of oxides and carbon. Therefore, metal-organic frameworks and their derivative materials have shown excellent application value in the fields of energy storage, sensing, catalysis, and gas adsorption. However, the preparation process of metal-organic framework materials reported so far involves the use of organic solvents, such as ethanol, dimethylformamide, etc. The use of these organic solvents increases the cost of experiments and practica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00
Inventor 吴玉程余翠平崔接武王岩张勇余东波舒霞
Owner HEFEI UNIV OF TECH