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Montmorillonite-loaded iron salt MOFs adsorbent and preparation method thereof

A montmorillonite and adsorbent technology, which is used in the preparation of montmorillonite-supported iron salt MOFs adsorbents, can solve the problems of high price of organic ligands and exploration of adsorbed dyes, and achieves good adsorption performance, efficient adsorption effect, and good adsorption performance. The effect of the application foreground

Inactive Publication Date: 2019-04-23
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of organic ligands used in this material is relatively high, and no research has been done on the adsorption of dyes.

Method used

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  • Montmorillonite-loaded iron salt MOFs adsorbent and preparation method thereof
  • Montmorillonite-loaded iron salt MOFs adsorbent and preparation method thereof
  • Montmorillonite-loaded iron salt MOFs adsorbent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] First, weigh out 0.5 g FeCl 3 • 6H 2 Put O and 1.2 g of terephthalic acid in a beaker, add 30 mL of N,N’-dimethylformamide and stir to dissolve. Secondly, add 0.4 g of acidified montmorillonite and stir at room temperature for 1 hour to make the raw materials uniformly dispersed. Then, the mixture was transferred to a 50mL polytetrafluoroethylene lined stainless steel reactor, and the temperature was raised to 120°C for 12 h. After the reactor was cooled to room temperature, the reaction mixture was taken out, and the product was collected by centrifugation at a certain speed. The product was washed twice with N,N'-dimethylformamide and absolute ethanol to remove the unreacted iron salt and organic compound. body. Finally, vacuum drying was carried out at 80°C for 10 h to obtain a light yellow powder, that is, the montmorillonite supported iron salt MOFs adsorbent. The highest removal rate of methylene blue by this adsorbent is 99.10%.

Embodiment 2

[0031] First, weigh 0.5 g Fe(NO 3 ) 3 • 9H 2 O and 0.1 g of trimesic acid were added to a beaker, 50 mL of N,N’-dimethylformamide and water were added, and stirred to dissolve. Secondly, add 0.9 g of acidified montmorillonite and stir for 2 h at room temperature to make the raw materials uniformly dispersed. Then, the mixture was transferred to a 100 mL polytetrafluoroethylene lined stainless steel reactor, and the temperature was raised to 160°C for 17 hours. After the reactor was cooled to room temperature, the reaction mixture was taken out, and the product was collected by centrifugation at a certain speed. The product was washed with N,N'-dimethylformamide and absolute ethanol 4 times to remove unreacted iron salt and organic compound. body. Finally, vacuum drying was carried out at 100°C for 12 h to obtain a light yellow powder, that is, the montmorillonite supported iron salt MOFs adsorbent. The highest removal rate of methylene blue by this adsorbent is 99.64%.

Embodiment 3

[0033] First, weigh 5 g Fe(NO 3 ) 3 • 9H 2 O and 1.2 g of terephthalic acid were put into a beaker, 60 mL of N,N’-dimethylformamide was added, and the mixture was stirred to dissolve. Secondly, add 3.5 g of acidified montmorillonite and stir for 2 h at room temperature to make the raw materials uniformly dispersed. Then, the mixture was moved to the reactor, and the temperature was raised to 180°C for 20 h. After the reactor was cooled to room temperature, the reaction mixture was taken out, and the product was collected by centrifugation at a certain speed. The product was washed with N,N'-dimethylformamide and absolute ethanol 4 times to remove unreacted iron salt and organic compound. body. Finally, vacuum drying was carried out at 170°C for 14 h to obtain a light yellow powder, namely, montmorillonite loaded iron salt MOFs adsorbent. The highest removal rate of methylene blue by this adsorbent is 98.96%.

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Abstract

The invention discloses a preparation method of a montmorillonite-loaded iron salt MOFs adsorbent. The method includes: dissolving iron salt and organic ligand into polar solvent, adding acidized montmorillonite, stirring and uniformly dispersing; transferring mixed dispersion liquid to a reactor, heating to 100-180 DEG C, and performing reaction for 8-24h; cooling after reaction is finished, andcentrifuging to collect a product; washing the product to remove unreacted iron salt and the organic ligand, and drying to obtain faint yellow powder namely the montmorillonite-loaded iron salt MOFs adsorbent. By a special structure and properties of montmorillonite, in-situ loading of biocompatible iron salt MOFs on the surface of lamellar montmorillonite is realized according to a hydrothermal method; by control of a microscopic size and structure of the iron salt MOFs, the obtained adsorbent is higher in stability and adsorption effectiveness than the iron salt MOFs. In addition, the adsorbent is great in dye waste liquid adsorption performance and has a promising application prospect in the field of adsorption removal of dye wastewater.

Description

Technical field [0001] The invention relates to a preparation method of a montmorillonite-loaded iron salt MOFs adsorbent, which is mainly used for the treatment of dye wastewater and belongs to the technical field of composite materials and the technical field of wastewater treatment. Background technique [0002] With the rapid development of industry and rapid population growth, the problem of water pollution has become increasingly prominent. In order to effectively treat polluted wastewater, water treatment technology has attracted much attention, and many treatment methods such as adsorption, filtration, dialysis and degradation have emerged. The adsorption method is simple, effective and low-cost, so the development of an efficient and environmentally friendly adsorption material is one of the important development directions in this field. The adsorption characteristics of adsorbent materials are mostly attributed to their large specific surface area and pore volume. Amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/30
CPCB01J20/226C02F1/285C02F2101/308
Inventor 何玉凤郭君慧王荣民陶誉尹唐风琴闫海彦
Owner NORTHWEST NORMAL UNIVERSITY
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