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Molecular sieve/porous carbon composite electrode material for capacitive adsorption desalination and preparation method thereof

A porous carbon material, capacitive adsorption technology, applied in separation methods, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of reducing desalination efficiency and electrode efficiency, increasing energy consumption, and limiting the application of porous carbon electrode materials, etc. Achieve the effect of facilitating ion diffusion and adsorption, reducing repulsion, and low cost

Active Publication Date: 2016-05-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual application of capacitive desalination, during the charging process of applying power, due to the repulsion of common ions, the same ion inside the electrode consumes electric energy and is excluded into the solution, resulting in a decrease in desalination efficiency and electrode efficiency, and increasing its energy consumption.
This problem limits the application of porous carbon electrode materials in the field of capacitive adsorption desalination

Method used

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  • Molecular sieve/porous carbon composite electrode material for capacitive adsorption desalination and preparation method thereof
  • Molecular sieve/porous carbon composite electrode material for capacitive adsorption desalination and preparation method thereof
  • Molecular sieve/porous carbon composite electrode material for capacitive adsorption desalination and preparation method thereof

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Embodiment 1

[0033] Take H-type β molecular sieve HSZ-1 with high silicon content as the doping component, and its properties are as follows: SiO 2 / Al 2 o 3 The molar ratio is 40:1, and the specific surface area is 530m 2 / g, the particle diameter is about 4 microns.

[0034] Preparation concentration is the dispersion liquid (dispersion in deionized water) of 50mg / mL activated carbon and HSZ-1 molecular sieve, adds PTFE emulsion (mass fraction 60%), activated carbon, HSZ-1 molecular sieve and PTFE mass ratio are 90:10:7, After mechanical stirring for 2 hours, dry in an oven at 95°C to obtain a flocculent molecular sieve / activated carbon mixture. A small amount of ethanol was added to the resulting mixture for wetting, rolled into a sheet and pressed on a titanium mesh to obtain an HSZ-1 / activated carbon (HSZ-1 / AC) electrode.

[0035] figure 1 It is the SEM topography image of HSZ-1 / AC electrode.

[0036] Assemble an asymmetric capacitive desalination device, use the molecular siev...

Embodiment 2

[0038] Take Na-type mordenite molecular sieve HSZ-2 with high silicon content as the doping component, and its properties are as follows: SiO 2 / Al 2 o 3 The molar ratio is 18:1, Na 2 O / Al 2 o 3 The molar ratio is 1:1, and the particle diameter is about 12 microns.

[0039] Preparation concentration is the dispersion liquid (dispersion in deionized water) of 50mg / mL activated carbon and HSZ-2 molecular sieve, adds PTFE emulsion (mass fraction 60%), activated carbon, HSZ-2 molecular sieve and PTFE mass ratio are 90:10:7, After mechanical stirring for 2 hours, dry in an oven at 95°C to obtain a flocculent molecular sieve / activated carbon mixture. A small amount of ethanol was added to the obtained HSZ-2 / activated carbon mixture for wetting, rolled into a sheet and pressed on a titanium mesh to obtain an HSZ-2 / activated carbon (HSZ-2 / AC) electrode. image 3 It is the SEM topography of HSZ-2 / AC electrode.

[0040] Assemble an asymmetric capacitive desalination device, use t...

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Abstract

The invention relates to a molecular sieve / porous carbon composite electrode material for capacitive adsorption desalination and a preparation method thereof. The mass fraction ratio of a molecular sieve structure material to a porous carbon material is (10-40%):(60-90%). The preparation method comprises the following steps: dispersing the porous carbon material and the molecular sieve structure material in deionized water to obtain dispersion liquid, adding an adhesive to obtain a mixed solution, stirring and drying to obtain a composite material, wetting the composite material, and rolling to press the composite material on an inert conductor. According to the preparation method provided by the invention, the porous carbon material and the molecular sieve structure compound are doped and compounded to prepare an electrode, and the doped molecular sieve can effectively improve the charge efficiency of a capacitor and improve the desalination performance, so that the molecular sieve / porous carbon composite electrode material has a potential application prospect in the aspect of capacitive desalination, and can be widely used in the fields of desalination of brackish water and sea water, softening of hard water, and the like.

Description

technical field [0001] The invention belongs to the field of electrode materials and preparation thereof, in particular to a molecular sieve / porous carbon composite electrode material for capacitive adsorption desalination and a preparation method thereof. Background technique [0002] Capacitive adsorption desalination is an electrostatic adsorption desalination technology based on the principle of electric double layer capacitance. Under the action of an external power supply, the anions and cations in the solution move to the opposite electrodes under the action of an electrostatic field and are adsorbed on the electrodes to achieve the purpose of desalination of brine. [0003] Preparation of low-consumption and high-efficiency electrode materials has always been the key to capacitive adsorption desalination technology. Porous carbon materials are widely used in electrode materials due to their advantages such as high specific surface area, developed pores, good electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469
CPCC02F1/4691C02F2103/08
Inventor 刘建允蔡文姝程健鄢俊彬朱国栋
Owner DONGHUA UNIV
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