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MOF with double ligands and modified adsorption material and preparation method thereof

An adsorption material and dual ligand technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve problems such as inability to apply heavy metal ion adsorption applications, limited ability to adsorb heavy metal ions, and single ligands. , to achieve the effect of improving low porosity structure, simple structure and improved adsorption effect

Pending Publication Date: 2020-12-29
GUANGDONG UNIV OF PETROCHEMICAL TECH +1
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Problems solved by technology

[0003] However, due to the single ligand and simple coordination structure of traditional MOF materials, their porosity and ability to adsorb heavy metal ions will be limited.
A novel Zn(II) metal-organic framework disclosed in patent CN105503912A and its synthesis method and application, using a single ligand 4'-(1H-tetrazolium-5)-biphenyl-3,5-dicarboxylic acid and Zinc ions coordinate to form MOF. Due to the single ligand and the limited chain length, the pore size and porosity of MOF are small, so it is not suitable for the adsorption of heavy metal ions.

Method used

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  • MOF with double ligands and modified adsorption material and preparation method thereof
  • MOF with double ligands and modified adsorption material and preparation method thereof
  • MOF with double ligands and modified adsorption material and preparation method thereof

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Embodiment 1

[0043] This embodiment provides a MOF adsorption material with double ligands. In this embodiment, the double ligand MOF adsorption material is referred to by the name GUT-4, and the double ligand MOF adsorption material is in the orthogonal space group Pnma Medium crystallization, the crystallographic data table is shown in Table 1 and Table 2.

[0044] From figure 1 It can be seen that the crystallographic unit contains two unique Zn(II) ions, one deprotonated 2,5-dihydroxyterephthalic acid ligand, two deprotonated 5-aminotetrazoles and one unprotonated Derived 5-amino-1H-tetrazolium molecule. Zn(II) is coordinated with three nitrogen atoms from three 5-amino-1H-tetrazoles and one oxygen atom from the carboxyl group of 2,5-dihydroxyterephthalic acid in the form of triangular pyramids, and Zn The three 5-amino-1H-tetrazolium ligands coordinated by (II) are almost on the same plane, and form a three-dimensional Framework. Calculated by PLATON analysis, the effective free v...

Embodiment 2

[0059] This embodiment provides a MOF adsorption material with double ligands.

[0060] This embodiment also provides a method for preparing the double-ligand MOF adsorption material as described above, and its detailed preparation method is as follows:

[0061] 1) Dissolve 10 mmol of 2,5-dihydroxyterephthalic acid, 4 mmol of 5-aminotetrazole and 7 mmol of zinc nitrate hexahydrate in 50 mL of DMF, and stir magnetically at 25°C for 15 min;

[0062] 2) Transfer the mixture in step 1) to a 200mL polytetrafluoroethylene autoclave, seal it and place it in an oven at 110°C for 36h;

[0063] 3) The reaction product in step 2) was cooled to 25° C., collected and washed 5 times with pure DMF to obtain the double-ligand MOF adsorption material.

[0064] This embodiment also provides a modified double ligand MOF-KMnO 4 Adsorption material, in this embodiment, the double ligand MOF-KMnO 4 Adsorbent material with the name GUT-4-KMnO 4 Refer to.

[0065] This embodiment also provides a...

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Abstract

The invention mainly relates to the technical field of metal organic framework materials, in particular to MOF with double ligands and a modified adsorption material and a preparation method thereof,the monomer molecular formula of the MOF adsorption material with double ligands is C11H11N15Zn2O6, the molecular weight is 580.09, the dual ligands are 2,5-dihydroxyl terephthalic acid and 5-amino tetrazole, and the MOF with double ligands has an excellent adsorption performance on heavy metal ions; and the MOF with double ligands is modified through a potassium permanganate oxidation modification method, so that the modified composite material double-ligand MOF-KMnO4 with good adsorption performance on cadmium ions is prepared. According to the present invention, the single ligand structureof a traditional MOF material is improved, cadmium, lead, copper and other pollutants in the wastewater can be effectively removed, and the MOF has the advantages of simple structure, reasonable design and easy manufacturing.

Description

technical field [0001] The invention mainly relates to the technical field of metal-organic framework materials, in particular to a MOF with double ligands, a modified adsorption material and a preparation method thereof. Background technique [0002] Coordination polymers have attracted extensive attention from researchers because they can design and synthesize ideal structural frameworks by selecting appropriate organic ligands and metal entities, with high specific surface area, abundant active sites and tunable pore size. Compared with some traditional porous materials, MOFs materials have greater potential in wastewater treatment. Carboxylic acid ligands have strong coordination ability, rich and diverse coordination modes, and it is easier to synthesize coordination polymers with various structures and properties. And it can be coordinated with metal ions to form a rigid structure with larger pores, so that the synthesized coordination polymer has potential applicatio...

Claims

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Application Information

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IPC IPC(8): B01J20/22C02F1/28C08G83/00B01J20/30C02F101/20
CPCB01J20/226B01J20/04C08G83/008C02F1/285C02F1/281C02F2101/20
Inventor 张淑华张子龙陈钊肖瑜李光照
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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