Preparation method of nanometer compounding capacitor type desalting electrode of carbon nanometer pipe/graphene sandwich structure

A carbon nanotube and ene sandwich technology, which is applied in the field of electrode desalination electrode manufacturing process, can solve the problems of increasing the specific surface area, not being able to realize the organic complementarity of carbon nanotubes and graphene, and being unable to provide orderly and regular ion diffusion channels, etc.

Active Publication Date: 2012-07-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the preparation of carbon nanotube / graphene three-dimensional nanostructure capacitive desalination electrode materials is mainly limited to liquid-phase ultrasonic mixing and auxiliary reduction treatment to obtain electrode materials. The electrode material carbon nanotubes prepared by this method is disordered insertion of graphite Graphene sheets cannot effectively separate graphene, the specific surface area has a small increase, and cannot provide ordered and regular ion diffusion channels, and cannot well realize the organic complementarity of carbon nanotubes and graphene in terms of structure and performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Under the condition of ice-water bath, slowly add 3 g of graphite into 120 mL of concentrated sulfuric acid under stirring, then slowly add 14 g of potassium permanganate, at 35 o C constant temperature water bath, keep stirring for 2 h, after the reaction, slowly add 500 mL of deionized water to dilute, stir for a few minutes, add 20 mL of H 2 o 2 , filter after standing, fully wash the filter cake until neutral, and dry at room temperature. Dry at room temperature. Take 0.1 g of graphite oxide and add 100 mL of deionized water, mix and sonicate for 0.5 h, the solid content of graphite oxide sol is 1 mg / mL, add nickel nitrate solution drop by drop, wherein the mass ratio of nickel nitrate to graphite oxide is 3,80 o C was heated and stirred for 10h, and then extracted and dried. 400 under inert atmosphere o C calcination for 90 min, 550 under reducing atmosphere o C was reduced for 0.5 h, methane was introduced, the gas flow was controlled at 80 mL / min, and 800 o...

Embodiment 2

[0018] Under the condition of ice-water bath, slowly add 3 g of graphite into 120 mL of concentrated sulfuric acid under stirring, then slowly add 7 g of potassium permanganate, at 35 o C constant temperature water bath, keep stirring for 3 h, after the reaction, slowly add 500 mL of deionized water to dilute, stir for a few minutes, add 25 mL of H 2 o 2 , filter after standing, fully wash the filter cake until neutral, and dry at room temperature. Dry at room temperature. Take 0.05 g of graphite oxide and add 100 mL of deionized water, mix and sonicate for 0.5 h, the solid content of graphite oxide sol is 0.5 mg / mL, add cobalt nitrate solution drop by drop, wherein the mass ratio of cobalt nitrate and graphite oxide is 0.5, 95 o C was heated and stirred for 20 h, then extracted and dried. 350 under inert atmosphereo C calcination for 60 min, 650 under reducing atmosphere o C was reduced for 10 min, ethylene was introduced, the gas flow was controlled at 60 mL / min, 750 o ...

Embodiment 3

[0021] Slowly add 2 g of graphite into 120 mL of concentrated sulfuric acid under stirring in an ice-water bath, then slowly add 14 g of potassium permanganate, at 35 o C constant temperature water bath, keep stirring for 2 h, after the reaction, slowly add 500 mL of deionized water to dilute, stir for a few minutes, add 20 mL of H 2 o 2 , filter after standing, fully wash the filter cake until neutral, and dry at room temperature. Dry at room temperature. Take 0.6 g of graphite oxide and add 200 mL of deionized water, mix and sonicate for 0.5 h, the solid content of graphite oxide sol is 3 mg / mL, add ferric nitrate solution drop by drop, wherein the mass ratio of ferric nitrate to graphite oxide is 1,85 o C was heated and stirred for 12 h, then extracted and dried. 300 under inert atmosphere o C calcination for 120 min, 650 under reducing atmosphere o C reduced for 0.5 h, passed through acetylene, 800 o C, control the gas flow to 70 mL / min, and react for 15 min, then ac...

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Abstract

The invention relates to a preparation method of a nanometer compounding capacitor type desalting electrode of a carbon nanometer pipe/graphene sandwich structure. According to the invention, carbon nanometer pipes in a composite electrode material are uniformly supported among grapheme layers to form a sandwich structure, and one end of each carbon nanometer pipe is connected with stripping graphene. According to the invention, the carbon nanometer pipes situ grow through chemical vapor deposition on graphene surface, thereby realizing low-cost and large-scale preparation of the carbon nanometer pipe/graphene sandwich structure nanometer composite material; and the carbon nanometer pipe/graphene sandwich structure nanometer composite material and polytetrafluoroethylene latex liquid are coated on a piece of graphite paper in a mixing uniformity manner, and the carbon nanometer pipe/graphene sandwich structure nanometer compounding capacitor type desalting electrode is prepared after drying. The prepared carbon nanometer pipe/graphene sandwich structure nanometer composite electrode provided by the invention has good conductibility, good desalting performance, and has potential application prospects on a low energy-consumption and low-cost capacitor type desalting aspect.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube / graphene sandwich structure nanocomposite capacitive desalination electrode. The carbon nanotube / graphene sandwich structure nanocomposite capacitive desalination electrode prepared by the invention is low-cost, can be produced in batches, and has high efficiency. , Low energy desalination performance. It belongs to the technical field of electric desalination electrode manufacturing technology. Background technique [0002] The capacitive desalination method is a new desalination technology based on the principle of electric double layer capacitance. Under the action of an external voltage (1-2V), the soluble salt ions in the solution move to the oppositely charged electrode and adsorb on the electrode, thereby achieving The purpose of desalination of salt water; when enough ions are adsorbed on the electrode, the electrode is short-circuited or reversed, and the salt ions adsorbed on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46
Inventor 张登松施利毅颜婷婷王慧温晓茹杜宪军张剑平
Owner SHANGHAI UNIV
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