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MOF (Metal Organic Framework) porous adsorption material as well as preparation method and application thereof

A porous adsorption material and porous material technology, applied in the field of MOF porous adsorption material and its preparation, can solve the problems of poor adsorption efficiency of low-concentration iodine, high cost of precious metals, and susceptibility to humidity interference, etc., to achieve abundant reserves, controllable cost, The effect of high structural stability

Pending Publication Date: 2022-04-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a MOF porous adsorption material and its preparation method and application, which solves the problems of low iodine loading of traditional adsorbents, poor adsorption efficiency of low-concentration iodine, susceptibility to humidity interference, and high cost of precious metals

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  • MOF (Metal Organic Framework) porous adsorption material as well as preparation method and application thereof
  • MOF (Metal Organic Framework) porous adsorption material as well as preparation method and application thereof
  • MOF (Metal Organic Framework) porous adsorption material as well as preparation method and application thereof

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Embodiment 1

[0044]The invention discloses a method for preparing a MOF porous material for capturing gas and liquid radioactive iodine, which comprises the following steps:

[0045] (1) Pb 2+ The soluble salt and 5-(4-pyridine) isophthalic acid were weighed respectively according to the molar ratio of 0.5:1;

[0046] (2) 5-(4-pyridine) isophthalic acid was stirred and dissolved in 8mL N,N-dimethylacetamide solution, Pb 2+ The soluble metal salt of is stirred and dissolved in 1mL N,N-dimethylacetamide solution, and then the two solutions are mixed to obtain a mixed solution;

[0047] (3) The reaction mother liquid was reacted at 100° C. for 24 hours at a constant temperature, cooled to room temperature, and the precipitate was filtered and washed with N,N-dimethylacetamide to obtain colorless transparent strip crystals.

Embodiment 2

[0049] The invention discloses a method for preparing a MOF porous material for capturing gas and liquid radioactive iodine, which comprises the following steps:

[0050] (1) Pb 2+ The soluble salt and 5-(4-pyridine) isophthalic acid were weighed respectively according to the molar ratio of 1:1;

[0051] (2) 5-(4-pyridine) isophthalic acid was stirred and dissolved in 10mL N,N-dimethylacetamide solution, Pb 2+ The soluble metal salt of is stirred and dissolved in 2mL N,N-dimethylacetamide solution, and then the two solutions are mixed to obtain a mixed solution;

[0052] (3) The reaction mother liquid was reacted at 120° C. for 48 hours at a constant temperature, cooled to room temperature, and the precipitate was filtered and washed with N,N-dimethylacetamide to obtain colorless transparent strip crystals.

Embodiment 3

[0054] The invention discloses a method for preparing a MOF porous material for capturing gas and liquid radioactive iodine, which comprises the following steps:

[0055] (1) Pb 2+ The soluble salt and 5-(4-pyridine) isophthalic acid are weighed respectively according to the molar ratio of 2:1;

[0056] (2) 5-(4-pyridine) isophthalic acid was stirred and dissolved in 12mL N,N-dimethylacetamide solution, Pb 2+ The soluble metal salt of is stirred and dissolved in 3mL N,N-dimethylacetamide solution, and then the two solutions are mixed to obtain a mixed solution;

[0057] (3) The reaction mother liquid was reacted at 140° C. for 96 hours at a constant temperature, cooled to room temperature, and the precipitate was filtered and washed with N,N-dimethylacetamide to obtain colorless transparent strip crystals.

[0058] A kind of MOF porous adsorption material that the present invention prepares, chemical formula is [Pb 2 (pia) 2 (DMA)]·DMA; wherein, pia is 5-(4-pyridine)isopht...

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Abstract

The invention belongs to the technical field of complex application, and discloses an MOF (Metal Organic Framework) porous adsorption material, a preparation method thereof and application of the MOF porous adsorption material in the aspects of efficiently adsorbing iodine vapor and capturing iodine molecules in an iodine aqueous solution. The MOF iodine adsorption material is prepared through solvothermal reaction of lead ions and 5-(4-pyridine) isophthalic acid (pi), the chemical formula is [Pb2 (pia) 2 (DMA)]. DMA, the compound is of a column-chain structure, Pb < 2 + > ions and ligand carboxylic acid groups form a defective double-cube alkane [Pb4O6]-based metal carboxyl chain, and the defect double-cube alkane [Pb4O6]-based metal carboxyl chain is used for adsorbing iodine. Adjacent chains are expanded into a three-dimensional porous network structure with a square window one-dimensional nano pore channel through pia ligands which are arranged in parallel. The MOF can be used for efficiently capturing iodine vapor and iodine molecules in an aqueous solution after being replaced with a low-boiling-point solvent and subjected to heating, vacuumizing and activating treatment, and the material keeps high structural stability in the iodine adsorption process.

Description

technical field [0001] The invention belongs to the technical field of complex applications, and in particular relates to a MOF porous adsorption material and its preparation method and application. Background technique [0002] Nuclear power is efficient and clean, with low carbon emissions and stable supply. Further developing safe and green nuclear power and steadily expanding the proportion of nuclear energy in the entire energy supply is in line with the country's sustainable development and "carbon neutral" strategy. However, a large number of radioactive products are generated in the process of nuclear power production, and most nuclear power units are located in economically developed and densely populated areas. It is necessary and urgent to develop new materials to achieve efficient treatment of radioactive pollutants produced by nuclear power for the further development and promotion of nuclear power. Radioactive iodine accounts for more than 30% of the early fiss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30G21F9/02G21F9/12
CPCB01J20/226B01J20/28054G21F9/02G21F9/12
Inventor 殷政雷镇鑫王鑫亿鱼亚楠马维敏
Owner SHAANXI UNIV OF SCI & TECH
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