A graphene-based film-coated metal ion separation device as electrode material

Abstract

The invention relates to an ion separation device with a graphene based thin film-coated metal as an electrode material, and relates to the ion separation device. The ion separation device is provided with a metal negative electrode, a negative electrode substrate, a saltwater inlet, a light saltwater outlet, a concentrated saltwater outlet, a Y-shaped channel and a positive electrode base sheet; the metal negative electrode is coated with a graphene nano porous film, the metal negative electrode is pre-embedded in the negative electrode substrate, and the metal negative electrode has one surface exposed out of the negative electrode substrate; the saltwater inlet, the concentrated saltwater outlet and the light saltwater outlet communicate with each other and form three channels, namely a saltwater channel, a concentrated saltwater channel and a light saltwater channel; the metal negative electrode is located in the light saltwater channel and is close to an intersection part of the saltwater channel, the concentrated saltwater channel and the light saltwater channel, and the metal negative electrode is exposed in the light saltwater channel. Firstly, the metal electrode coated with the graphene nano porous film is prepared, and then the ion separation device with the graphene based thin film-coated metal as the electrode material is prepared. The ion separation device has the advantages of simple preparation, low cost, good ion separation effect, and large scale integration and application, and has broad application prospects.

Description

technical field [0001] The invention relates to an ion separation device, in particular to an ion separation device with a graphene-based thin film coated metal as an electrode material and a preparation method thereof. Background technique [0002] The principle of ion concentration polarization is that under the action of an electric field generated by a DC bias voltage, when ions pass through a nanochannel with anion / cation selective permeability, anion / cations pass through, and cations / anions are repelled. Electroneutrality, so that the exchange of anion and cation reaches a static balance, there will be a concentration polarization phenomenon, and an ion depletion area and an ion enrichment area will appear. Concentration polarized devices realize ion separation through the action of ion depletion region and enrichment region. Microfluidic ion separation devices made using the principle of ion concentration polarization can be used in many fields such as seawater desal...

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Problems solved by technology

The complexity of device design and fabrication is not conducive to its practical application

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