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A composite material for improving the stability of tetraamidohexamethylphenyl ring iron and its preparation method and application method

A technology based on hexamethylphenyl and composite materials, applied in chemical instruments and methods, water treatment of special compounds, organic compound/hydride/coordination complex catalysts, etc., can solve problems such as irreversible deactivation, and achieve improved Collision probability, increase the rate of degradation of tetrabromobisphenol A, and improve the effect of acid resistance

Active Publication Date: 2019-10-25
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the fact that the activity of Fe(III)-TAML in the prior art has a strong pH dependence, it will be significantly reduced under acidic and neutral conditions, especially under acidic conditions, it is prone to demetallization and irreversible inactivation. The invention provides a kind of dichloromethane / water mixed solvent as the medium, and synthesizes Fe(III)-TAML / DODMA, DODMA, a microscopic composite material based on Fe(III)-TAML, through the method of surfactant DODMA-assisted self-assembly The dialkyl chain can effectively prevent the attack of hydrogen ions on Fe(III)-TAML, thus improving the stability of Fe(III)-TAML under acidic and neutral or near-neutral conditions

Method used

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  • A composite material for improving the stability of tetraamidohexamethylphenyl ring iron and its preparation method and application method
  • A composite material for improving the stability of tetraamidohexamethylphenyl ring iron and its preparation method and application method
  • A composite material for improving the stability of tetraamidohexamethylphenyl ring iron and its preparation method and application method

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preparation example Construction

[0053] A kind of preparation method of the composite material that improves tetraamido hexamethylphenyl cycloiron stability of the present invention, its steps are:

[0054] (a) DODMA solution is added dropwise to Fe(III)-TAML solution; The configuration steps of DODMA and Fe(III)-TAML solution in step (a) are:

[0055] (1) DODMA is dissolved in methylene chloride to obtain a DODMA solution;

[0056] (2) dissolving Fe(III)-TAML in ultrapure water to obtain Fe(III)-TAML solution;

[0057] (b) stirring the mixed solution in the step (a), then standing to obtain the composite material Fe(III)-TAML / DODMA, the step of obtaining the composite material Fe(III)-TAML / DODMA in the step (b) is:

[0058] (3) After adding the DODMA solution dropwise to the Fe(III)-TAML solution, stir with a magnetic stirrer for at least 24 hours to ensure that the dichloromethane is completely volatilized;

[0059] (4) Stand still for at least 24 hours after the stirring is completed, so that the composi...

Embodiment 1

[0074]A method for preparing a composite material for improving the stability of tetraamidohexamethylphenyl ring iron, the steps of which are: using a surfactant-assisted self-assembly method to dissolve dioctadecyl dimethyl chloride in dichloromethane Ammonium chloride DODMA was added dropwise to the Fe(III)-TAML aqueous solution to synthesize Fe(III)-TAML / DODMA, a composite material based on Fe(III)-TAML, the molar ratio of Fe(III)-TAML and DODMA was 1 :3, 1:6, 1:12. During the preparation process, for all treatment groups, a yellow opaque emulsion was formed when DODMA was added, and the Fe(III)-TAML in the solution would settle to the bottom of the solution and separate after standing. When vigorously stirred for more than 24 hours, a stable yellow suspension was obtained, which was used for characterization, degradation and stability experiments after standing and aging for 24 hours.

[0075] The Fe(III)-TAML / DODMA suspension obtained in this embodiment is passed through...

Embodiment 2

[0077] A method for preparing a composite material for improving the stability of tetraamidohexamethylphenyl ring iron, the steps of which are: using a surfactant-assisted self-assembly method to dissolve dioctadecyl dimethyl chloride in dichloromethane Ammonium chloride DODMA was added dropwise to the Fe(III)-TAML aqueous solution to synthesize Fe(III)-TAML / DODMA, a composite material based on Fe(III)-TAML, the molar ratio of Fe(III)-TAML and DODMA was 1 :3, 1:6, 1:12. During the preparation process, for all treatment groups, a yellow opaque emulsion was formed when DODMA was added, and the Fe(III)-TAML in the solution would settle to the bottom of the solution and separate after standing. When vigorously stirred for more than 24 hours, a stable yellow suspension was obtained, which was used for characterization, degradation and stability experiments after standing and aging for 24 hours.

[0078] The Fe(III)-TAML / DODMA suspension obtained in this example was dropped on a gl...

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Abstract

The invention discloses a composite material for improving the stability of tetracarboxamide hexamethyl cyclic iron (Fe(III)-TAML), as well as a preparation method and an application method thereof, belongs to the field of environmental functional material synthesis, and solves the problem of irreversible inactivation caused by the fact that Fe(III)-TAML easily performs demetalization reaction under an acidic condition. The composite material Fe(III)-TAML / DODMA by using Fe(III)-TAML as a substrate is synthesized by using methylene dichloride / water mixed solution as a medium through a surfactant dioctadecyl dimethyl ammonium chloride (DODMA) auxiliary self-assembly method. Compared with free-state Fe(III)-TAML, the composite material Fe(III)-TAML / DODMA has the advantages that the acid resistance and reaction stability are remarkably reinforced, the reaction activity is slightly improved.

Description

technical field [0001] The invention belongs to the field of synthesis of environmental functional materials, and more specifically relates to a composite material for improving the stability of tetraamidohexamethylphenyl ring iron and its preparation method and application method. Background technique [0002] The hydrogen peroxide activator tetraamidohexamethylphenyl cycloiron (abbreviated as tetraamide cycloiron, Fe(III)-TAML) can efficiently remove various organic pollutants, such as chlorophenol (S.S.Gupta, M.Stadler, et al. al., Rapid Total Destruction of Chlorophenols by Activated Hydrogen Peroxide, Science 296(2002) 326-328; K. Mierzwicki, S. Berski, et al., AIM and ELF analysis of the H-, Me-, and F-substituted FeIII– TAML complexes, Chemical Physics Letters 507 (2011) 29-36), organophosphorus pesticide fenitrothion (A.Chanda, S.K.Khetan, et al., Total Degradation of Fenitrothion and Other Organophosphorus Pesticides by Catalytic Oxidation Employing Fe-TAML Peroxide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C02F1/00C02F1/28C02F1/26C02F1/72C02F101/34C02F101/36
CPCC02F1/00C02F1/26C02F1/28C02F1/281C02F1/285C02F1/725C02F2101/345C02F2101/36C02F2305/04C02F2305/08
Inventor 谷成王超
Owner NANJING UNIV