Method for preparing modified activated carbon and capacitive deionization electrode

A technology of capacitive deionization and activated carbon, which is applied in separation methods, dispersed particle separation, seawater treatment, etc., can solve the problems of insufficient yield, difficulty in mass production, and imperfect preparation process, so as to improve the desalination amount and desalination rate, and improve the desalination rate. The effect of hydrophilicity and capacitive properties, good application prospects

Inactive Publication Date: 2016-02-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the research hotspots of capacitive deionization and desalination electrode materials are mostly focused on new carbon materials with excellent performance such as carbon aerogels, carbon nanotubes and graphene. Although gratifying progress has been made, these new materials are still in the basic research stage. The process is not yet perfect, and it is difficult to prepare in large quantities. Therefore, these novel carbon materials have disadvantages such as high preparation cost and insufficient output, which restricts the industrial application of capacitive deionization technology.

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  • Method for preparing modified activated carbon and capacitive deionization electrode
  • Method for preparing modified activated carbon and capacitive deionization electrode
  • Method for preparing modified activated carbon and capacitive deionization electrode

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Embodiment 1

[0036] Using activated carbon as a raw material, the preparation of modified activated carbon is realized simply and quickly by ozone oxidation treatment, and it is used for capacitive deionization, including the following steps:

[0037] (1) The specific surface area of ​​3.5g is 2000m 2 / g, the total pore volume is 1cm 3 Mix / g of activated carbon with 250mL of water to prepare a black suspension mixture, and place the mixture in a 300w ultrasonic cleaner for ultrasonic treatment at 25°C to 30°C for 15 minutes;

[0038] (2) The mixed material obtained in step (1) is subjected to ozone oxidation treatment, and oxygen is used as gas source in the ozone oxidation process, and the gas flow rate is 0.2Nm 2 / h, the ozone concentration is 100-130mg / L, the ozone production rate is 10g / h, the temperature is set at 25°C, and the ozone oxidation time is 50min;

[0039] (3) Freeze the mixed material obtained in step (2) at -18~-20°C, put it into a freeze dryer at -19°C after freezing,...

Embodiment 2

[0047] Using activated carbon as a raw material, the preparation of modified activated carbon is realized simply and quickly by ozone oxidation treatment, and it is used for capacitive deionization, including the following steps:

[0048] (1) The specific surface area of ​​3.5g is 2000m 2 / g, the total pore volume is 1cm 3 Mix / g of activated carbon with 250mL of water to prepare a black suspension mixture, and place the mixture in a 300w ultrasonic cleaner for ultrasonic treatment at 25°C to 30°C for 15 minutes;

[0049](2) The mixed material obtained in step (1) is subjected to ozone oxidation treatment, and oxygen is used as gas source in the ozone oxidation process, and the gas flow rate is 0.2Nm 2 / h, the ozone concentration is 100-130mg / L, the ozone production rate is 10g / h, the temperature is set at 25°C, and the ozone oxidation time is 50min;

[0050] (3) Freeze the mixed material obtained in step (2) at -18--20°C, and put it into a freeze dryer at -19°C to dry for 8...

Embodiment 3

[0058] Using activated carbon as a raw material, the preparation of modified activated carbon is realized simply and quickly by ozone oxidation treatment, and it is used for capacitive deionization, including the following steps:

[0059] (1) The specific surface area of ​​3.5g is 2000m 2 / g total pore volume is 1cm 3 Mix / g of activated carbon with 250mL of water to prepare a black mixture, and place the mixture in a 300w ultrasonic cleaning machine for ultrasonic treatment at 25°C to 30°C for 15 minutes;

[0060] (2) The mixed material obtained in step (1) is subjected to ozone oxidation treatment, and oxygen is used as gas source in the ozone oxidation process, and the gas flow rate is 0.2Nm 2 / h, the ozone concentration is 100-130mg / L, the ozone production rate is 10g / h, the temperature is set at 25°C, and the ozone oxidation time is 50min;

[0061] (3) Freeze the mixed material obtained in step (2) at -18--20°C, and put it into a freeze dryer at -19°C to dry for 84 hour...

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Abstract

The invention provides a method for preparing modified activated carbon. The method comprises the steps of mixing activated carbon with water, and obtaining a mixed material; carrying out ultrasonic treatment on the mixed material; carrying out ozone oxidation treatment; freezing under -18 to -20 DEG C; carrying out freezing and drying under -18 to -20 DEG C. According to the method for preparing the modified activated carbon and the capacitive deionization electrode, provided by the invention, the used raw material is the activated carbon, the cost is low, and the activated carbon can be conveniently and easily obtained; the prepared modified activated carbon has good hydrophilia and capacitive performance through simple ozonation treatment, and the modified activated carbon is suitable for a capacitive deionization technology; the modified activated carbon is used for an electrode material of the capacitive deionization technology, the desalting quantity and the desalting speed can be effectively increased, and a good application prospect is obtained.

Description

technical field [0001] The invention belongs to the technical field of carbon material modification, in particular to a method for preparing modified activated carbon and a capacitive deionization electrode. Background technique [0002] In recent years, due to the ever-increasing water resource crisis, capacitive deionization has attracted widespread attention in the scientific community. This technology also has a wide range of application prospects in biological, medical and other technical fields. [0003] Capacitive deionization (CDI) is the use of electrochemical methods, using porous carbon materials as electrodes to achieve desalination of seawater. The desalination capacity is an important parameter of capacitive deionization process, and it is also an important index for examining commercial prospects. The amount of desalination refers to the mass of salt absorbed by the electrode material per unit mass. At present, the desalination energy of CDI is mainly improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C02F1/469C02F103/08
Inventor 郝策陈佳王刚宋雪旦
Owner DALIAN UNIV OF TECH
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