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Preparation method of nitrogen-doped porous carbon rod capacitance desalting electrode

A technology of nitrogen-doped porous carbon and porous carbon, applied in chemical instruments and methods, water/sewage treatment equipment, electrochemical water/sewage treatment, etc., can solve the problem of increasing synthesis cost, prolonging synthesis cycle, unfavorable large-scale production, etc. problems, achieve good conductivity, mild conditions, and large specific surface area

Active Publication Date: 2016-10-26
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nitrogen doping treatment in the later stage increases the synthesis cost and prolongs the synthesis cycle, which is not conducive to large-scale production

Method used

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  • Preparation method of nitrogen-doped porous carbon rod capacitance desalting electrode
  • Preparation method of nitrogen-doped porous carbon rod capacitance desalting electrode
  • Preparation method of nitrogen-doped porous carbon rod capacitance desalting electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Preparation of Capacitive Desalting Electrode

[0029] Dissolve 0.5mol of 2-aminoterephthalic acid and 0.5mol of ferric chloride hexahydrate in 50ml of deionized water at room temperature, stir for 10 minutes, transfer to a 100mL hydrothermal kettle, and place in a constant temperature drying oven at 100°C Heat for 6 hours. The obtained sample is centrifugally washed and dried to obtain MIL-88-NH 2 ; The resulting MIL-88-NH 2 Place in a tube furnace under a nitrogen atmosphere at a heating rate of 2°C / min to 700°C for 2 hours. The obtained carbonized product was etched with 5M hydrochloric acid, washed and dried to obtain a nitrogen-doped spindle-shaped porous carbon rod (named NCRs-700), see figure 1 . Using nitrogen adsorption and desorption, X-ray diffraction and photoelectron spectroscopy to analyze the synthesized porous carbon rods, it is proved that it has the characteristics of wide pore size, high graphitization, and high nitrogen doping content, see Tab...

Embodiment 2

[0034] 1) Preparation of Capacitive Desalting Electrode

[0035] Dissolve 0.5mol of 2-aminoterephthalic acid and 0.5mol of ferric chloride hexahydrate in 50ml of deionized water at room temperature, stir for 10 minutes, transfer to a 100mL hydrothermal kettle, and place in a constant temperature drying oven at 100°C Heat for 6 hours. The obtained sample is centrifugally washed and dried to obtain MIL-88-NH 2 ; The resulting MIL-88-NH 2 Place in a tube furnace under a nitrogen atmosphere at a heating rate of 2°C / min to 800°C for 2 hours. The obtained carbonized product was etched with 5M hydrochloric acid, washed and dried to obtain a nitrogen-doped spindle-shaped porous carbon rod (named NCRs-800), see figure 2 . Using nitrogen adsorption and desorption, X-ray diffraction and photoelectron spectroscopy to analyze the synthesized porous carbon rods, it is proved that it has the characteristics of wide pore size, high graphitization, and high nitrogen doping content, see Ta...

Embodiment 3

[0040] 1) Preparation of Capacitive Desalting Electrode

[0041] Dissolve 0.5mol of 2-aminoterephthalic acid and 0.5mol of ferric chloride hexahydrate in 50ml of deionized water at room temperature, stir for 10 minutes, transfer to a 100mL hydrothermal kettle, and place in a constant temperature drying oven at 100°C Heat for 6 hours. The obtained sample is centrifugally washed and dried to obtain MIL-88-NH 2 ; The resulting MIL-88-NH 2 Place in a tube furnace under a nitrogen atmosphere at a heating rate of 2°C / min to 900°C for 2 hours. The obtained carbonized product was etched with 5M hydrochloric acid, washed and dried to obtain a nitrogen-doped spindle-shaped porous carbon rod (named NCRs-900), see image 3 . Using nitrogen adsorption and desorption, X-ray diffraction and photoelectron spectroscopy to analyze the synthesized porous carbon rods, it is proved that it has the characteristics of wide pore size, high graphitization, and high nitrogen doping content, see Tab...

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Abstract

The invention discloses a preparation method of a nitrogen-doped porous carbon rod capacitance desalting electrode and belongs to the field of capacitance desalting electrode preparation. According to the preparation method, firstly, a metal organic frame MIL-88-NH2 is synthesized through a hydrothermal reaction, and washing, drying, high temperature annealing and etching with acid liquor are conducted to obtain highly-graphitized nitrogen-doped porous carbon which is in a fusiform rod shape and has a wide pore diameter; the prepared nitrogen-doped porous carbon rod, acetylene black and polyvinyl alcohol are mixed to be uniform, graphite paper is coated with the mixture, drying is conducted, and the capacitance desalting electrode is obtained. The preparation method has the advantages that the metal organic frame is used for preparing the highly-graphitized nitrogen-doped porous carbon material which is of a fusiform rod structure and has the wide pore diameter for a precursor; the specific surface area, the degree of graphitization and the nitrogen doping content of the prepared fusiform porous carbon rod can be controlled by controlling temperature; the preparation process is simple and easy to conduct, conditions are mild, and the preparation method can be used for large-scale production.

Description

technical field [0001] The invention relates to the technical field of capacitive desalination electrode manufacturing, in particular to a preparation method of a nitrogen-doped porous carbon rod capacitive desalination electrode with a wide aperture and high graphitization. The prepared desalination electrode has the desalination performance of high efficiency, high rate and low energy consumption, and is suitable for desalination treatment of high concentration brine, desalination of seawater and brackish water, and provides a new way for high efficiency, low energy consumption and low cost desalination technology. Background technique [0002] Capacitive desalination technology, that is, capacitive deionization technology, also known as electrosorption, has the advantages of high desalination efficiency, low energy consumption, and environmental friendliness. technology. In the 21st century, with the rapid growth of world population and global industrialization, the shor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46
CPCC02F1/4604C02F2201/46
Inventor 徐兴涛潘丽坤王苗刘勇陆婷
Owner EAST CHINA NORMAL UNIV
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