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An exploit based on mil-101 ​​(cr 3+ ) metal organic framework material adsorption method for organic dyes in water

A metal-organic framework, organic dye technology, applied in the direction of adsorption of water/sewage treatment, water pollutants, alkali metal compounds, etc., to achieve great application potential and industrial value, simple preparation process, and obvious adsorption effect.

Active Publication Date: 2021-12-10
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, few studies have been reported using materials as liquid-phase adsorbents for dyes

Method used

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  • An exploit based on mil-101 ​​(cr <sup>3+</sup> ) metal organic framework material adsorption method for organic dyes in water
  • An exploit based on mil-101 ​​(cr <sup>3+</sup> ) metal organic framework material adsorption method for organic dyes in water
  • An exploit based on mil-101 ​​(cr <sup>3+</sup> ) metal organic framework material adsorption method for organic dyes in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Based on MIL-101 (Cr 3+ ) type mesoporous-microporous metal-organic framework materials:

[0029] Dissolve (0.0821g, 1mmol) 2-methylimidazole in 20ml of high-purity water, stir at room temperature for 5min; slowly add (0.5401g, 2mmol) Azobenzene-4-4'dicarboxylic acid into 2-methylimidazole solution, and Continue stirring for 25min; then (0.8003g, 2mmol) Cr(NO 3 ) 3 9H 2 O was added to the stirred mixed solution, stirred at room temperature for 15 min, and the solution was black and turbid. The obtained mixed solution was transferred to a 30ml polytetrafluoroethylene-lined stainless steel reaction kettle, and placed in an oven at 170°C for 24 hours. The reactor was naturally cooled to room temperature, the obtained precipitate was centrifuged, washed three times with absolute ethanol, then washed three times with high-purity water, and dried at 80°C for 15 hours to obtain a product based on MIL-101 (Cr 3+ ) type of mesoporous-microporous metal-organic framework mate...

Embodiment 2

[0035] Dissolve (0.0821g, 1mmol) 2-methylimidazole in 20ml of high-purity water and stir for 5min; slowly add (0.5401g, 2mmol) Azobenzene-4-4'dicarboxylic acid into the 2-methylimidazole solution and continue stirring 25min; Then (0.8003g, 2mmol) Cr(NO 3 ) 3 9H 2 O was added to the stirred mixed solution and stirred for 15 min, the solution was black and turbid. The obtained mixed solution was transferred to a 30ml polytetrafluoroethylene-lined stainless steel reaction kettle, and placed in an oven at 160°C for 24 hours.

Embodiment 3

[0037] Dissolve (0.0821g, 1mmol) 2-methylimidazole in 20ml of high-purity water and stir for 5min; slowly add (0.5401g, 2mmol) Azobenzene-4-4'dicarboxylic acid into the 2-methylimidazole solution and continue stirring 25min; Then (0.8003g, 2mmol) Cr(NO 3 ) 3 9H 2 O was added to the stirred mixed solution and stirred for 15 min, the solution was black and turbid. The obtained mixed solution was transferred to a 30ml polytetrafluoroethylene-lined stainless steel reaction kettle, and placed in an oven at 150°C for 24 hours.

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Abstract

The invention discloses a method based on MIL‑101 (Cr 3+ ) method for adsorbing organic dyes in water by metal-organic framework materials. It comprises the following steps: (1) 2-methylimidazole, Azobenzene-4-4'dicarboxylic acid, Cr(NO 3 ) 3 9H 2 O is dissolved in deionized water, stirred, and reacted by hydrothermal method at 150°C-180°C for a certain period of time. (2) The reaction product is washed and purified repeatedly, and then dried in vacuum to obtain a mesoporous-microporous metal-organic framework material. (3) Put the mesoporous-microporous metal-organic framework material obtained in step (2) into the water containing the organic dye and stir for a certain period of time to complete the adsorption of the organic dye in the water. The compound can be used as an adsorbent to efficiently and quickly adsorb organic dyes such as methylene blue, and the removal rate of methylene blue is as high as 98.77%.

Description

technical field [0001] The present invention relates to a metal-organic framework material, in particular to a metal-organic framework material based on MIL-101 (Cr 3+ ) method for adsorbing organic dyes in water by metal-organic framework materials. Background technique [0002] With the rapid development of my country's textile printing and dyeing industry, dye wastewater has become one of the most important sources of water pollution today. During the entire dye production process, a large amount of dye wastewater is produced in processes such as nitration, crossification, diazotization, reduction oxidation, and salting out. It is estimated that about 100% of the organic raw materials and 100% of the inorganic raw materials enter the water during the dye production process, plus the dye wastewater, resulting in a very complex composition of the dye wastewater. Dye wastewater contains a variety of biologically toxic and carcinogenic substances, as well as a variety of re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28B01J20/22B01J20/28B01J20/30C02F101/30
CPCC02F1/285B01J20/226B01J20/28059B01J20/30B01J20/3078B01J20/3071C02F2101/308
Inventor 李新华涂佩华蒋俊肖洪平
Owner WENZHOU UNIV
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