Preparation method of carbon nano-tube/mesoporous-carbon composite capacitance-type desalting electrode

Abstract

The invention relates to a preparation method of a carbon nano-tube / mesoporous-carbon composite capacitance-type desalting electrode, which belongs to the preparation field of capacitance-type desalting electrodes. The preparation method comprises the following steps of: adding a carbon nano-tube into a precursor of a mesoporous material, uniformly dispersing by utilizing ultrasonic and magnetic stirring, and forming a high-molecular compound with the mesoporous material around the carbon nano-tube through curing; carbonizing through inert-gas protection to obtain carbon nano-tube / mesoporous-carbon composite-mateiral powder with ordered height and large specific surface area; and finely grinding a sample, smearing the sample onto graphite paper after being mixed with a polytetrafluoroethylene emulsion, and drying to prepare the carbon nano-tube / mesoporous-carbon composite capacitance-type desalting electrode. The preparation method has a simple process and easily-controlled conditions. A carbon nano-tube electrode prepared by the method disclosed by the invention has good electrical conductivity and better desalting performance and has potential application prospects in the aspectof capacitance-type desalting.

Description

technical field

[0001] The invention relates to a method for preparing a carbon nanotube / mesoporous carbon composite capacitive desalination electrode. The carbon nanotube / mesoporous carbon composite capacitive desalination electrode prepared by the invention has desalination performance of high efficiency and low energy consumption. It belongs to the technical field of electric desalination electrode manufacturing technology. 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 and membrane methods. The operation temperature of the distillation method is high, and the energy consumption is large; the scale hazard and corrosion are serious; the membrane method has strict requirements on the performance of the membrane, and the membrane damage rate is ...

Examples

Embodiment 1

[0023] Configure a sodium hydroxide solution with a mass concentration of 20%, take 0.13g and add 0.61g 40-42 o In the molten phenol at C, after stirring for 10 minutes, add 1.03 g of formaldehyde solution with a mass fraction of 37% and slowly raise the temperature to 70-75 o C reacted for 1.5 h, lowered to room temperature and adjusted the pH of the solution to 5.0 with 0.2M dilute hydrochloric acid solution.o C vacuum dehydration under reduced pressure for 1-2 hours to remove the water content in the viscous liquid. The obtained phenolic resin precursor was dissolved in ethanol and stirred overnight, and the precipitated sodium chloride was removed by centrifugation. The final prepared ethanol solution of phenolic resin precursor was 20 wt.%. 1g of structure directing agent Pluronic F127 (Mw=12600, EO 106 PO 70 EO 106 ) was dissolved in 20g of ethanol, stirred until clear and transparent; then added the phenolic resin precursor ethanol solution (20wt.%) prepared above a...

Embodiment 2

[0027] Configure a sodium hydroxide solution with a mass concentration of 20%, take 0.26 g and add it to 1.22g 40-42 o In the molten phenol at C, after stirring for 10 min, add 2.1 g of formaldehyde solution with a mass fraction of 37% and slowly raise the temperature to 73 o C reacted for 2 h, lowered to room temperature and adjusted the pH of the solution to 6.0 with 0.5M dilute sulfuric acid solution. o C vacuum dehydration under reduced pressure for 1-2 hours to remove the water content in the viscous liquid. The obtained phenolic resin precursor was dissolved in ethanol and stirred overnight, and the precipitated sodium sulfate was removed by centrifugation. The final prepared ethanol solution of phenolic resin precursor was 20 wt.%. 1g of structure directing agent Pluronic F127 (Mw=12600, PEO 106 PPOs 70 PEOs 106 ) was dissolved in 20g of ethanol, stirred until clear and transparent; then added the phenolic resin precursor ethanol solution (20wt.%) prepared above an...

Embodiment 3

[0031] Get 0.196g mass concentration and be 20% sodium hydroxide solution, add 0.92g 40-42 o In the molten phenol at C, after stirring for 10 min, add 1.57 g of formaldehyde solution with a mass fraction of 37% and slowly raise the temperature to 73 o C reacted for 2 h, lowered to room temperature and adjusted the pH of the solution to 5.0 with 1.0M dilute nitric acid solution. o C vacuum dehydration under reduced pressure for 1-2 hours to remove the water content in the viscous liquid. The obtained phenolic resin precursor was dissolved in ethanol and stirred overnight, and the precipitated sodium nitrate was removed by centrifugation. The final prepared ethanol solution of phenolic resin precursor was 20 wt.%. 1g of structure directing agent Pluronic P123 (Mw=5800, PEO 20 PPOs 70 PEOs 20 ) was dissolved in 20g of ethanol, stirred until clear and transparent; then added the phenolic resin precursor ethanol solution (20wt.%) prepared above and stirred for 10min to obtain ...

technical field

[0001] The invention relates to a method for preparing a carbon nanotube / mesoporous carbon composite capacitive desalination electrode. The carbon nanotube / mesoporous carbon composite capacitive desalination electrode prepared by the invention has desalination performance of high efficiency and low energy consumption. It belongs to the technical field of electric desalination electrode manufacturing technology. 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 and membrane methods. The operation temperature of the distillation method is high, and the energy consumption is large; the scale hazard and corrosion are serious; the membrane method has strict requirements on the performance of the membrane, and the membrane damage rate is ...

Examples

Embodiment 1

[0023] Configure a sodium hydroxide solution with a mass concentration of 20%, take 0.13g and add 0.61g 40-42 o In the molten phenol at C, after stirring for 10 minutes, add 1.03 g of formaldehyde solution with a mass fraction of 37% and slowly raise the temperature to 70-75 o C reacted for 1.5 h, lowered to room temperature and adjusted the pH of the solution to 5.0 with 0.2M dilute hydrochloric acid solution.o C vacuum dehydration under reduced pressure for 1-2 hours to remove the water content in the viscous liquid. The obtained phenolic resin precursor was dissolved in ethanol and stirred overnight, and the precipitated sodium chloride was removed by centrifugation. The final prepared ethanol solution of phenolic resin precursor was 20 wt.%. 1g of structure directing agent Pluronic F127 (Mw=12600, EO 106 PO 70 EO 106 ) was dissolved in 20g of ethanol, stirred until clear and transparent; then added the phenolic resin precursor ethanol solution (20wt.%) prepared above a...

Embodiment 2

[0027] Configure a sodium hydroxide solution with a mass concentration of 20%, take 0.26 g and add it to 1.22g 40-42 o In the molten phenol at C, after stirring for 10 min, add 2.1 g of formaldehyde solution with a mass fraction of 37% and slowly raise the temperature to 73 o C reacted for 2 h, lowered to room temperature and adjusted the pH of the solution to 6.0 with 0.5M dilute sulfuric acid solution. o C vacuum dehydration under reduced pressure for 1-2 hours to remove the water content in the viscous liquid. The obtained phenolic resin precursor was dissolved in ethanol and stirred overnight, and the precipitated sodium sulfate was removed by centrifugation. The final prepared ethanol solution of phenolic resin precursor was 20 wt.%. 1g of structure directing agent Pluronic F127 (Mw=12600, PEO 106 PPOs 70 PEOs 106 ) was dissolved in 20g of ethanol, stirred until clear and transparent; then added the phenolic resin precursor ethanol solution (20wt.%) prepared above an...

Embodiment 3

[0031] Get 0.196g mass concentration and be 20% sodium hydroxide solution, add 0.92g 40-42 o In the molten phenol at C, after stirring for 10 min, add 1.57 g of formaldehyde solution with a mass fraction of 37% and slowly raise the temperature to 73 o C reacted for 2 h, lowered to room temperature and adjusted the pH of the solution to 5.0 with 1.0M dilute nitric acid solution. o C vacuum dehydration under reduced pressure for 1-2 hours to remove the water content in the viscous liquid. The obtained phenolic resin precursor was dissolved in ethanol and stirred overnight, and the precipitated sodium nitrate was removed by centrifugation. The final prepared ethanol solution of phenolic resin precursor was 20 wt.%. 1g of structure directing agent Pluronic P123 (Mw=5800, PEO 20 PPOs 70 PEOs 20 ) was dissolved in 20g of ethanol, stirred until clear and transparent; then added the phenolic resin precursor ethanol solution (20wt.%) prepared above and stirred for 10min to obtain ...