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Resin-based hybrid material based on zirconium-based metal organic framework modification and application thereof

An organic framework and base metal technology, which is applied in the field of water micro-pollution control and environmental nano-composite functional materials, can solve the problems of reducing the adsorption capacity to 0, secondary pollution, and low adsorption capacity of activated alumina, and improve the adsorption selectivity. , Strengthen the effect of deep removal and excellent adsorption selectivity

Pending Publication Date: 2020-08-14
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the activated alumina adsorption method is the most common, but the adsorption capacity of activated alumina is not high, and the best defluoridation performance is between pH=5~6 (J.Hazard.Mater.,2006,137(1),456-463 ), while the pH in real fluorine-polluted water is generally neutral and weakly alkaline, while the adsorption capacity of activated alumina is almost reduced to zero under neutral and weakly alkaline conditions.
In addition, activated alumina begins to leach aluminum in medium-alkaline water, which is prone to secondary pollution

Method used

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  • Resin-based hybrid material based on zirconium-based metal organic framework modification and application thereof
  • Resin-based hybrid material based on zirconium-based metal organic framework modification and application thereof
  • Resin-based hybrid material based on zirconium-based metal organic framework modification and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this example 1, UiO-66-NH is loaded by macroporous strongly basic anion exchange resin D201 2 Nanoparticles get the hybrid material UiO-66-NH 2 @D201. Its average particle size is 0.8mm, and the loaded UiO-66-NH 2 Nanoparticles are uniformly dispersed in the resin pores (such as figure 1 shown), the morphology is regular octahedral shape, the particle size is 50-100nm, and the immobilization amount on the polymer resin is 6% (the UiO-66-NH 2 6% solid loading is calculated by measuring the content of zirconium element).

[0036] The specific preparation steps of the above-mentioned hybrid material loaded with zirconium-based metal-organic framework are as follows:

[0037] (1) 0.4661g ZrCl 4 Disperse in 50mL N-N dimethylformamide, ultrasonically dissolve completely for 15 minutes to obtain a metal zirconium salt solution A with a concentration of 0.04M, then add 1.25g D201 resin to the metal zirconium salt solution A, and stir at 25°C for 30 minute;

[0038] (2...

Embodiment 2

[0045] In Example 2, the macroporous strongly basic anion exchange resin D201 was loaded with UiO-66 nanoparticles to obtain the hybrid material UiO-66@D201. The average particle size is 0.8mm, the shape of the loaded UiO-66 nanoparticles is regular octahedron, the particle size is 50-100nm, and the immobilization amount on the polymer resin is 6%.

[0046] The specific preparation steps of the above-mentioned hybrid material loaded with zirconium-based metal-organic framework are as follows:

[0047] (1) 0.4661g ZrCl 4 Disperse in 50mL N-N dimethylformamide, ultrasonically dissolve completely for 15 minutes to obtain a metal zirconium salt solution A with a concentration of 0.04M, then add 1.25g D201 resin to the metal zirconium salt solution A, and stir at 25°C for 30 minute;

[0048] (2) Disperse 0.3322g of terephthalic acid organic ligand in 50mL of N-N dimethylformamide solvent, ultrasonically dissolve it for 15 minutes to obtain an organic ligand solution B with a conc...

Embodiment 3

[0055] In this example 3, UiO-66-NO is loaded by macroporous strongly basic anion exchange resin D201 2 Nanoparticles get the hybrid material UiO-66-NO 2 @D201. Its average particle size is 0.8mm, and the loaded UiO-66-NO 2 The shape of the nanoparticles is regular octahedron, the particle size is 50-100nm, and the immobilization amount on the polymer resin is 5%.

[0056] The specific preparation steps of the above-mentioned hybrid material loaded with zirconium-based metal-organic framework are as follows:

[0057] (1) 0.4661g ZrCl 4 Disperse in 50mL N-N dimethylformamide, ultrasonically dissolve completely for 15 minutes to obtain a metal zirconium salt solution A with a concentration of 0.04M, then add 1.25g D201 resin to the metal zirconium salt solution A, and stir at 25°C for 30 minute;

[0058] (2) Disperse 0.4784g of 2-nitroterephthalic acid organic ligand in 50mL of N-N dimethylformamide solvent, ultrasonically dissolve it for 15 minutes to obtain an organic lig...

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Abstract

The invention discloses a resin-based hybrid material based on zirconium-based metal organic framework modification and application thereof. According to the resin-based hybrid material, polymer resinserves as a matrix, zirconium-based metal organic framework UiO-66 series materials are immobilized on the matrix, the UiO-66 series materials are nanoparticles and are in a regular octahedron form,the particle size ranges from 20 nm to 100 nm, and the immobilization amount ranges from 2% to 16%. Macromolecular resin is used as a carrier, and zirconium-based metal organic framework series nanoparticles are immobilized in reticulated ducts of the carrier to form the hybrid material. The hybrid material effectively exerts the high adsorption performance and excellent adsorption selectivity ofthe zirconium-based metal organic framework to the fluorine ions, has excellent hydromechanical properties of a large-particle resin-based exchange agent and a strong enrichment effect on the fluorineions, and can greatly enhance the deep removal of the fluorine ions.

Description

technical field [0001] The invention belongs to the field of water body micro-pollution control and environmental nanocomposite functional materials, and specifically relates to a series of resin-based hybrid materials modified by zirconium-based metal-organic frameworks, a preparation method and an application in efficiently removing fluorine ions in water. Background technique [0002] Fluorine is an element that exists widely in nature and is one of the essential elements in the metabolic process of the human body. Adequate intake of fluorine is beneficial to the human body, but excessive intake of fluorine will damage tooth enamel and affect bone formation and bone breakdown activities, thereby disrupting the normal metabolism of the human body. At present, the fluorine content of drinking water in many parts of the world far exceeds the fluorine standard (1.5mg / L) stipulated by the World Health Organization, and endemic fluorosis has attracted widespread attention from ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/24B01J20/30C02F1/28C02F101/14C02F103/06
CPCB01J20/226B01J20/24C02F1/286C02F2101/14C02F2103/06
Inventor 邱慧叶美晨倪文翔赵远生家欣王然
Owner NANJING UNIV OF INFORMATION SCI & TECH
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