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Preparation of metal supramolecular organogel and application thereof to adsorption and separation of methylene blue

A supramolecular gel, methylene blue technology, applied in the directions of alkali metal compounds, adsorbed water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve problems such as high selectivity, achieve efficient adsorption and separation, and wide application Foreground effect

Active Publication Date: 2019-04-26
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many methods to adsorb methylene blue dyes, there are still few reports on highly selective and efficient adsorption and separation of methylene blue.

Method used

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  • Preparation of metal supramolecular organogel and application thereof to adsorption and separation of methylene blue
  • Preparation of metal supramolecular organogel and application thereof to adsorption and separation of methylene blue
  • Preparation of metal supramolecular organogel and application thereof to adsorption and separation of methylene blue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1. Preparation of metal supramolecular organogel TG-Fe

[0031] 1. Synthesis of the main body TNA: Add 1 mmol (0.2639 g) of trimesoyl chloride and 3.5 mmol (0.7422 g) of 1,8-naphthalimide hydrazine in 30 mL of DMF, and react at room temperature for about 12 hours; after the reaction Add hydrochloric acid, cool, white flocs precipitate out, filter with suction, and recrystallize with DMF and ethanol to obtain the product TNA. The yield is 68.3%;

[0032] 2. Synthesis of guest G: add 4-aminopyridine (0.75 g, 8.0~8.05 mmol) and CHCl to a 100 mL round bottom flask 3 (40 mL), add trimesoyl chloride (0.52 g, 5.0 ~5.05 mmol) and CHCl 3 (40 mL), let it slowly drop into the round bottom flask overnight; filter with suction, recrystallize with DMF and water to obtain white solid Q, yield: 80%;

[0033] 3. Synthesis of organogel TG: take 12.86 mg (16 mmol) N-amino-1,8-naphthalene dicarboxylic anhydride functionalized trimesoyl chloride (TNA), 7.14 mg (16 mmol) 4-aminopy...

Embodiment 2

[0035] Example 2. Metal-Organogel TG-Fe Efficiently Adsorbs Dye Methylene Blue

[0036] The metal organic gel TG-Fe is heated under vacuum to prepare TG-Fe xerogel powder. In methylene blue (10ml, 10 -5 M) Add 2 mg xerogel powder (TG-Fe) to the dye solution, and stir at room temperature for 60-70 min. The color of the methylene blue solution was found to be significantly lighter. Through the test of ultraviolet spectrum experiment, the adsorption rate of methylene blue by metal organic gel TG-Fe can reach 96.5%.

Embodiment 3

[0037] Example 3. Separation of two mixed dyes of methylene blue and methyl orange by metal organic gel TG-Fe

[0038] The metal organic gel TG-Fe was heated and dissolved, added into a 1ml glass tube, and naturally cooled to prepare a gel chromatographic column. Methylene blue solution (10 -3 M) and methyl orange solution (10 -3 M) Mix at a volume ratio of 1:1; take 500 μl of the mixed solution and add it to a gel chromatography column, and use water as the mobile phase for column separation. As time goes by, it can be clearly seen that methyl orange is gradually eluted with the mobile phase, while methylene blue is adsorbed on the metal organogel, thereby achieving the separation of the two mixed dyes.

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Abstract

The invention discloses a metal supramolecular organogel. The metal supramolecular organogel is characterized in that N-amino-1,8-naphthalic anhydride functionalized trimesoyl chloride is treated as amain body, 4-aminopyridine functionalized trimesoyl chloride is treated as an object; the main body and the object are self-assembled and complexed to obtain supramolecular organogel TG in a DMSO-H2Osystem under the effect of hydrogen bond and pi-pi; 0.15-0.20 equivalent Fe (III) salt is added into the supramolecular organogel TG to freely disperse until the supramolecular organogel TG fluorescence is completely quenched, and thus the metal supramolecular organogel TG-Fe is obtained. The supramolecular organogel is capable of adsorbing dye methylene blue with high selectivity and high efficiency; in addition, the supramolecular organogel is capable of effectively separating two mixed solutions of methyl orange and methylene blue by a gel chromatographic column method, and thus the metalsupramolecular organogel has a wide application prospect in the fields of biochemical engineering and material chemistry with the performance of effectively adsorbing and separating the methylene blue.

Description

technical field [0001] The present invention relates to a metallosupramolecular organogel, in particular to a method for preparing a metallosupramolecular organogel capable of adsorbing the dye methylene blue with high selectivity and high efficiency; The specific application of the method and the separation of methylene blue belongs to the technical field of dye adsorption and the technical field of dye separation. Background technique [0002] The continuous development of society promotes the development of the chemical industry, but industrial wastewater is also increasing in the process of development. Dye wastewater is one of the main harmful industrial wastewater, which mainly comes from the production industry of dyes and dye intermediates. It is composed of the mother liquor of crystallization of various products and intermediates, materials lost during the production process, and sewage from washing the ground. With the continuous growth of the dye industry, its p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/223B01J20/28047C02F1/285C02F2101/308
Inventor 林奇巩冠斐陈燕燕樊彦青魏太保张有明姚虹
Owner NORTHWEST NORMAL UNIVERSITY
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