A kind of preparation method of enhanced activated carbon capacitive desalination electrode

An activated carbon and enhanced technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve the problems of high cost of anion and cation exchange membranes and the inability to realize large-scale use, and achieve simple preparation process and easy operation , the effect of high specific surface area

Active Publication Date: 2019-07-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of anion and cation exchange membranes is relatively high, and large-scale use cannot be achieved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 3g of activated carbon into a three-necked flask, add 300mL of 50wt%~80wt% concentrated nitric acid and 300mL of deionized water, reflux and stir at 90°C for 3h, cool to room temperature, filter with suction, wash with deionized water until neutral , Dry at 60°C for 12h to obtain activated carbon. Dissolve 10.5g of p-aminobenzenesulfonic acid in 5wt% NaOH solution under slight heat, add 15mL of pre-cooled concentrated hydrochloric acid and 50mL of ice water, stir and react at 0~5℃ for 15min, add sodium nitrite dropwise Solution, reacted for 25min to obtain aryl diazonium salt; ultrasonically dispersed 5g of activated carbon in a certain amount of water (concentration: 3mg / mL), added 100g of aryl diazonium salt, stirred in ice bath for 1h, suction filtered and used Wash with deionized water several times, and dry in an oven at 40°C to obtain sulfonated activated carbon.

[0019] Weigh 5g of activated carbon and ultrasonically disperse it in acetone (concentration:...

Embodiment 2

[0023] Weigh 3g of activated carbon into a three-necked flask, add 400mL of concentrated nitric acid and 300mL of deionized water, reflux and stir at 70°C for 2h, cool to room temperature, perform suction filtration, wash with deionized water until neutral, and dry at 60°C 12h, the activated carbon was obtained. Dissolve 10.5g of p-aminobenzenesulfonic acid in 5wt% NaOH solution under slight heat, add 15mL of pre-cooled concentrated hydrochloric acid and 50mL of ice water, stir and react at 0~5℃ for 15min, add sodium nitrite dropwise Solution, reacted for 20min to obtain aryl diazonium salt; ultrasonically dispersed 5g of activated carbon in a certain amount of water (concentration: 6mg / mL), added 200g of aryl diazonium salt, stirred in ice bath for 2h, suction filtered and used Wash with deionized water several times, and dry in an oven at 60°C to obtain sulfonated activated carbon.

[0024] Weigh 5g of activated carbon and ultrasonically disperse it in acetone (concentratio...

Embodiment 3

[0028]Weigh 3g of activated carbon into a three-necked flask, add 600mL of concentrated nitric acid and 300mL of deionized water, reflux and stir at 80°C for 3h, cool to room temperature, perform suction filtration, wash with deionized water until neutral, and dry at 60°C 12h, the activated carbon was obtained. Dissolve 10.5g of p-aminobenzenesulfonic acid in 5wt% NaOH solution under slight heat, add 15mL of pre-cooled concentrated hydrochloric acid and 50mL of ice water, stir and react at 0~5℃ for 15min, add sodium nitrite dropwise Solution, reacted for 20min to obtain aryl diazonium salt; ultrasonically dispersed 5g of activated carbon in a certain amount of water (concentration: 3mg / mL), added 300g of aryl diazonium salt, stirred in ice bath for 3h, suction filtered and used Wash with deionized water several times, and dry in an oven at 60°C to obtain sulfonated activated carbon.

[0029] Weigh 5g of activated carbon and ultrasonically disperse it in acetone (concentration...

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PUM

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Abstract

The invention relates to a preparation method of enhanced active carbon capacitance desalting electrode, and belongs to the technical field of a manufacturing process of a capacitance desalting electrode. The method comprises the following steps that active carbon is used as materials; through activation by concentrated nitric acid, the active carbon with active sites is obtained; arenediazonium salt and 3-aminopropyl triethoxy silane are used for sulfonation and amination, so that the active carbon has the ionic selectivity; the active carbon is used for capacitance desalting; the desalting performance and the electrode regeneration performance can be effectively improved. The method provided by the invention has the advantages that the process is fast and simple; the cost is low; the method can be used for seawater and bitter water desalting; a novel path is provided for low-energy-consumption low-cost and high-performance desalting.

Description

technical field [0001] The invention relates to a preparation method of an enhanced activated carbon capacitive desalination electrode, belonging to the technical field of capacitive desalination electrode manufacturing technology. The desalination electrode prepared by the invention has the advantages of ion selectivity and high desalination efficiency, can be used for desalination of seawater and brackish water, and provides a new way for desalination with low cost, low energy consumption and high performance. Background technique [0002] In recent years, problems such as the shortage of resources caused by industrial development and economic growth have become increasingly severe. The shortage of fresh water resources has become a huge challenge we are facing. In order to solve this problem, we have researched and invented a Seawater desalination method has become a hot research topic. Capacitive desalination technology is an effective way to desalinate seawater or brac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469C02F103/08
CPCC02F1/4691C02F2103/08
Inventor 张登松施利毅颜婷婷张剑平
Owner SHANGHAI UNIV
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