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Preparing method of graphene/carbon nanotube aerogel composite capacitive type desalting electrode

A carbon nanotube and graphene technology, which is applied in the field of preparation of graphene/carbon nanotube aerogel composite capacitive desalination electrodes, can solve the problems of poor electrical conductivity, low specific surface area, affecting desalination performance, etc., and achieves easy operation. , high specific surface area, good desalination performance

Active Publication Date: 2015-12-09
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing methods for preparing graphene hydrogel include hydrothermal method, reducing agent reduction method, etc., and graphene airgel can be obtained by freeze-drying or supercritical drying. However, the single graphene airgel currently prepared Low specific surface area and poor electrical conductivity will affect the final desalination performance

Method used

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  • Preparing method of graphene/carbon nanotube aerogel composite capacitive type desalting electrode
  • Preparing method of graphene/carbon nanotube aerogel composite capacitive type desalting electrode

Examples

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Embodiment 1

[0023] see figure 1 , this example provides a kind of preparation method of graphene / carbon nanotube airgel composite capacitive desalination electrode, it comprises the following steps:

[0024] Take 0.06g of graphite oxide and add 30mL of deionized water, mix and sonicate for 0.5h, the solid content of graphite oxide sol is 2mg / mL. Single-wall carbon nanotubes are added in the dispersion liquid of graphite oxide, and ultrasonic dispersion is uniform, and carbon nanotube: the mass ratio of graphite oxide is 1:9; After ultrasonic dispersion is uniform, add 0.29g ascorbic acid, 95 o C for 3 h; freeze-dry the obtained hydrogel, and then further reduce the aerogel under the protection of nitrogen atmosphere to prepare the graphene / carbon nanotube airgel composite material. Under the protection of nitrogen atmosphere, with 1 o C / min heating rate increased to 800 o C, keep warm for 3h, and the gas flow rate is 90mL / min. The prepared graphene / carbon nanotube composite material, ...

Embodiment 2

[0026] see figure 2 , this example provides a kind of preparation method of graphene / carbon nanotube airgel composite capacitive desalination electrode, it comprises the following steps:

[0027]Take 0.06g of graphite oxide and add 30mL of deionized water, mix and sonicate for 0.5h, the solid content of graphite oxide sol is 2mg / mL. Single-wall carbon nanotubes are added in the dispersion liquid of graphite oxide, ultrasonic dispersion is uniform, carbon nanotube: the mass ratio of graphite oxide is 1:6; After ultrasonic dispersion is uniform, add 0.29g ascorbic acid, 95 o C for 3 h; freeze-dry the obtained hydrogel, and then further reduce the aerogel under the protection of nitrogen atmosphere to prepare the graphene / carbon nanotube airgel composite material. Under the protection of nitrogen atmosphere, with 1 o C / min heating rate increased to 800 o C, keep warm for 3h, and the gas flow rate is 90mL / min. The prepared graphene / carbon nanotube composite material, conducti...

Embodiment 3

[0029] This example provides a kind of preparation method of graphene / carbon nanotube airgel composite capacitive desalination electrode, which comprises the following steps:

[0030] Take 0.06g of graphite oxide and add 30mL of deionized water, mix and sonicate for 0.5h, the solid content of graphite oxide sol is 2mg / mL. Double-walled carbon nanotubes are added in the dispersion liquid of graphite oxide, and ultrasonic dispersion is uniform, and the mass ratio of carbon nanotubes: graphite oxide is 1:4; After ultrasonic dispersion is uniform, add 0.18g hydroquinone, 80 o The reaction was carried out at C for 3 hours; the obtained hydrogel was freeze-dried, and then the airgel was further reduced under the protection of an inert gas atmosphere to obtain a graphene / carbon nanotube airgel composite material. Under the protection of nitrogen atmosphere, with 1 o C / min heating rate increased to 800 o C, keep warm for 3h, and the gas flow rate is 100mL / min. The prepared graphene...

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Abstract

The invention relates to a preparing method of a graphene / carbon nanotube aerogel composite capacitive type desalting electrode, belonging to the field of preparing of capacitive type desalting. The method comprises the steps: ultrasonically mixing a water dispersion liquid of carbon nanotubes and graphite oxide and adding a reducer, wherein the reduced graphene is self-assembled under certain temperature to form graphene / carbon nanotube water hydrogel; freezing and drying the graphene / carbon nanotube water hydrogel, and reducing in a nitrogen gas atmosphere, thus obtaining the graphene / carbon nanotube aerogel composite material. The composite material, conducting carbon black and polytetrafluoroethylene emulsion are uniformly mixed and then smeared on graphite paper, and the capacitive type desalting electrode can be obtained by drying. According to the preparing method, the phenomenon of stacking or agglomeration among layers of a graphene material and the defect of poor electrical conductivity are overcome, the operation is simple, conditions are easy to control and environment friendliness is realized; the made electrode has rich three-dimensional ducts, good electrical conductivity and excellent desalting performance, and has potential application prospect in the aspect of capacitive type desalting.

Description

technical field [0001] The invention relates to a preparation method of a graphene / carbon nanotube airgel composite capacitive desalination electrode. The composite material prepared by the invention has rich three-dimensional pore structure and good electrical conductivity, and the desalination electrode prepared by the composite material has high efficiency and low energy consumption desalination performance, and belongs to the technical field of electric desalination electrode manufacturing technology. The invention can be applied to the desalination of seawater and brackish water, and provides a new approach for desalination with low energy consumption, low cost and high performance. Background technique [0002] The water resource crisis is one of the biggest resource crises facing the world in this century, and desalination of seawater and brackish water is an important way to solve this crisis. The existing desalination methods mainly include distillation (including ...

Claims

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Application Information

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IPC IPC(8): C02F1/469C02F103/08
Inventor 施利毅张登松赵珊珊颜婷婷张剑平
Owner SHANGHAI UNIV
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