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A kind of preparation method of particle electrode

A particle electrode and electrolytic treatment technology, which is applied in the direction of electrode shape/type, chemical instruments and methods, textile industry wastewater treatment, etc., can solve the problems of complex electrode preparation process, low current efficiency, and short life

Active Publication Date: 2018-06-29
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional granular electrodes have high resistance and low conductivity, which lead to low current efficiency, insufficient stability, short life, high cost of electrode materials, and complicated electrode preparation processes in wastewater treatment, which limit the development of granular electrode materials. Therefore, , the development of composite particle electrodes has been paid more and more attention by scholars.

Method used

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  • A kind of preparation method of particle electrode
  • A kind of preparation method of particle electrode
  • A kind of preparation method of particle electrode

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preparation example Construction

[0031] A method for preparing a particle electrode, comprising the following steps:

[0032] 1) Mix the zinc salt and 2-methylimidazole in an organic solvent, mix thoroughly, separate the solid and liquid to obtain a solid, wash, and dry to obtain the surface catalyst ZIF-8;

[0033] 2) Fully mix the surface catalyst ZIF-8 obtained in the previous step with the solvent to make a seed crystal suspension;

[0034] 3) Pretreatment of γ-Al by cleaning, drying and roasting 2 o 3 , the pulling method will pretreated γ-Al 2 o 3 Immerse in the suspension prepared in the previous step, keep it for a set time, and fully dry after taking it out;

[0035] 4) Mix 2-methylimidazole, sodium fatty acid, and zinc salt in a solvent to obtain a film-forming solution;

[0036] 5) Place the particles obtained in step 3) in the reaction kettle, pour the film-forming liquid into it, seal the reaction kettle, and heat up to crystallize;

[0037] 6) Cool to room temperature, take out the particl...

Embodiment 1

[0050] 1) Prepare a certain proportion of Zn(NO 3 ) 2 and 2-methylimidazole in methanol (Zn 2+ , 2-methylimidazole, solvent methanol ratio is 1.2mmol: 1mmol: 25ml), stirred at room temperature for a period of time, centrifuged to obtain a white solid, washed with methanol, dried overnight to obtain the surface catalyst ZIF-8;

[0051] 2) Add the ZIF-8 prepared in step (1) to an aqueous methanol solution with a mass concentration of 20% to prepare a seed crystal suspension with a concentration of 2%;

[0052] 3) Pretreatment of γ-Al by cleaning, drying and roasting 2 o 3 , the pulling method will pretreated γ-Al 2 o 3 Immerse in the suspension prepared in step (2), keep it for 10 hours, take it out, dry it at room temperature, and dry it at 120°C for one day to obtain particles loaded with ZIF-8 seeds: γ-Al 2 o 3 @ZIF-8;

[0053] 4) Weigh a certain amount of 2-methylimidazole, sodium formate and zinc chloride according to a certain proportion, dissolve them in a methanol ...

Embodiment 2

[0060] 1) Prepare a certain proportion of Zn(NO 3 ) 2 and 2-methylimidazole in methanol (Zn 2+ , 2-methylimidazole, and a solvent ratio of 1mmol: 1mmol: 20ml), stirred at room temperature for a period of time, centrifuged to obtain a white solid, washed with methanol, and dried overnight to obtain the surface layer catalyst ZIF-8;

[0061] 2) Add the ZIF-8 prepared in step (1) to an aqueous methanol solution with a mass concentration of 20% to make a seed crystal suspension with a concentration of 0.5%;

[0062] 3) Pretreatment of γ-Al by cleaning, drying and roasting 2 o 3 , the pulling method will pretreated γ-Al 2 o 3 Immerse in the suspension prepared in step (2), keep it for 12 hours, take it out, and dry it at room temperature for one day at 120°C to obtain particles loaded with ZIF-8 seeds: γ-Al 2 o 3 @ZIF-8;

[0063] 4) Weigh a certain amount of 2-methylimidazole, sodium formate and zinc chloride according to a certain proportion, dissolve them in a methanol so...

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Abstract

The invention discloses a preparation method of a granular electrode, which comprises the following steps: 1) mixing zinc salt and 2-methylimidazole in an organic solvent, fully mixing, separating solid and liquid to obtain a solid, washing and drying; 2 ) Fully mix the solid obtained in the previous step with a solvent to make a seed crystal suspension; 3) Pretreat γ-Al2O3 by washing, drying, and roasting, and impregnate the pretreated γ-Al2O3 in the suspension prepared in the previous step 4) Mix 2-methylimidazole, fatty acid sodium, and zinc salt in the solvent to obtain a film-forming solution; 5) Place the particles obtained in step 3) in the film-forming 6) Cool to room temperature, take out the particles, soak them in a solvent to remove unreacted components on the surface; 7) Then immerse the particles in a solvent different from the solvent used in step 6), fully soak, take out and dry That's it. The granular electrode prepared by the invention can effectively degrade and treat the chromaticity of organic matter that is difficult to degrade and remove in printing and dyeing wastewater, such as treating printing and dyeing wastewater containing rhodamine B and the like.

Description

technical field [0001] The invention relates to a method for preparing a granular electrode. Background technique [0002] With the development of modern industry, the discharge of various types of sewage is increasing, especially the printing and dyeing wastewater is difficult to deal with such as large water volume, large chroma, complex composition, large pH fluctuation, high concentration of organic matter, high COD load and strong toxicity. At present, the traditional printing and dyeing wastewater treatment methods include chemical flocculation and biodegradation, but there are certain defects. The treatment of hydrophilic organic matter and chroma is not ideal, and it is difficult to efficiently and quickly degrade substances such as rhodamine B and methyl orange. . The advanced oxidation process (Advanced Oxidation Processes, AOPs), especially the electrocatalytic oxidation technology has attracted more and more attention, and has become a new hot spot in printing a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/02C02F1/461C02F103/30
CPCC02F1/46109C02F1/46114C02F2001/46133C02F2103/30
Inventor 张立国刘慧君刘蕾
Owner SOUTH CHINA NORMAL UNIVERSITY
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