Metal organic framework material as well as synthetic method and application thereof

A metal-organic framework and framework material technology, used in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc. And other issues

Inactive Publication Date: 2019-05-03
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve these problems, more and more attention has been paid to the research of adsorbents. At present, most of the synthesized porous materials are purely adsorbing pollutants, and the adsorption is more targeted, often only for the adsorption of a single substance, and cannot Adsorbed heavy metals and pigment molecules are reused
Because the molecules of pollutants are closely combined with the adsorbent and it is difficult to separate them, the adsorbent is mostly used for one-time use, and the loss rate is relatively large.

Method used

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  • Metal organic framework material as well as synthetic method and application thereof
  • Metal organic framework material as well as synthetic method and application thereof
  • Metal organic framework material as well as synthetic method and application thereof

Examples

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Embodiment 1

[0033] This embodiment discloses a metal-organic framework material, the framework material comprises organic ligands and metal ions bridging each other in space, and its chemical formula is [A m o n (BPTC)] xB;

[0034] Among them, m=1-5, n=1-5, A is one of manganese, copper, cobalt, nickel, iron, zinc, BPTC is biphenyl tetracarboxylate, and B is selected from charged positive cations , including C 2 N + 、H 3 o + , NH 4 + , Li + 、Na + 、K + , Mg + , Ca + 、Al + One of, or positively charged macromolecules, including one of methylene blue, pyro red, rhodamine B, methyl green, crystal violet, magenta, and malachite green; X is 1-100.

[0035] The following embodiments of the present invention all adopt the chemical formula as C 8 h 2 MnO 5 ·C 4 N 2 The adsorption, desorption and re-adsorption of metal-organic framework material crystalline MOFs-1 were studied.

[0036] The framework material is orthorhombic, I2 1 2 1 2 1 space group, the unit cell parameters...

Embodiment 2

[0039] This embodiment also discloses a method for synthesizing the above-mentioned MOFs-1 metal-organic framework material, using manganese chloride tetrahydrate and 3,3',5,5'-biphenyltetracarboxylic acid according to the molar ratio of 1-5:5-1 After proportional mixing, add the mixed mixture into the solution, the mass concentration of the mixture is 1-100mg / ml; mix and react at 30-160°C for 0.5-7 days to obtain a metal organic framework material; the solvent is water, At least one or more of ethanol, methanol, chloroform, DMF, acetonitrile, and dichloromethane.

[0040] The preparation method of MOFs-1 used in the following examples of the present invention is as follows: after mixing manganese chloride tetrahydrate and 3,3',5,5'-biphenyltetracarboxylic acid in a molar ratio of 2:1, the mixed The mixture was added to the mixed solution of DMF, ethanol and water, the volume ratio of DMF, ethanol and water was 3:2:2, mixed and reacted at 100°C for 3 days to obtain the target ...

Embodiment 3

[0042] This example discloses a method for enriching the heavy metal mercury Hg by the metal-organic framework material MOFs-1 disclosed in Example 2 above.

[0043] Take 10mg of the synthesized crystal MOFs-1 and put it into a 10ml small volumetric flask, add 3ml of the prepared ethanol saturated solution of mercuric chloride (0.07mg / 1ml), and pay attention that the liquid level of the added solvent should be higher than the solid crystal. After sealing the bottle, place the vial in an oven at 60°C. After 8 hours, the vial was taken out, and it was observed that the crystals in the bottle changed from original pale pink to white. The crystal skeleton is negatively charged, and the positively charged mercury ions exchange the original guest dimethylamine molecules in the cavity and disperse in the pores of the crystal. Because the crystal framework itself is negatively charged, a thick layer of mercury ions is also attached to the crystal surface, which greatly increases the ...

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Abstract

The invention discloses a metal organic framework material. The framework material is formed by mutual bridging of an organic ligand and metal ions in a space, and has a chemical formula of [AmOn(BPTC)].xB, wherein m = 1 to 5, n = 1 to 5, A is one selected from the group consisting of manganese, copper, cobalt, nickel, iron and zinc, BPTC is a biphenyl tetracarboxylic radical, B is one selected from charged positive cations including C2N<+>, H3O<+>, NH4<+>, Li<+>, Na<+>, K<+>, Mg<+>, Ca<+> and Al<+> or one selected from positively-charged macromolecules including methylene blue, methyl green-pyronin, rhodamine B, methyl green, crystal violet, magenta and malachite green, and X is 1 to 100. The invention also discloses a method of synthesizing the above metal organic framework material andan application of the metal organic framework material. According to the metal organic framework material, synthetic method and application provided by the invention, the metal organic framework material has the advantages of being capable of adsorbing, desorbing and recycling a large amount of enriched heavy metals and dyes.

Description

technical field [0001] The invention belongs to the technical field of MOFs materials, and specifically relates to the technical field of metal ligand framework materials. Background technique [0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds. For example, Minamata disease in Japan was caused by mercury pollution. The degree of harm depends on the concentration and chemical form of heavy metals in the environment, food and organisms. Heavy metal pollution is mainly manifested in water pollution, and partly in the atmosphere and solid waste. [0003] Dye pollution means that with the widespread use of organic dyes, a large amount of dyes are discharged into the environment, and most dyes are extremely stable and difficult to degrade naturally. What's more serious is that most of the dyes are toxic substances, which have carcinogenic and teratogenic effects, and their discharge into the environment poses a great threa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/30C02F101/20
Inventor 轩小朋马晓帆闫影静田慧敏卢国栋
Owner HENAN NORMAL UNIV
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