Composite electrochemical electrode and preparation method thereof

Abstract

The invention discloses a composite electrochemical electrode and a preparation method thereof. The composite electrode comprises an electrode substrate and a metal wire mesh modification layer whichis matched with the surface size of the electrode substrate, overlaps the surface of the electrode substrate and is fixedly connected with the electrode substrate into a whole. The preparation methodof the composite electrochemical electrode comprises the following steps: superposing the metal wire mesh on the outer surface of the hollow tubular ceramic membrane of the electrode substrate; preparation process is easy to operate, the process conditions are easy to control, the substrate of the prepared composite electrode and the outer modified composite metal wire mesh layer are firmly combined and are not liable to fall off, the service life of the composite electrode is long, the composite electrode has good conductivity and membrane filtration performance, oil, acidic substances and refractory organic pollutants in wastewater can be efficiently removed, and the composite electrode has important practical value.

Description

technical field [0001] The invention relates to an electrode and a preparation method thereof, in particular to a chemically modified composite electrochemical electrode and a preparation method thereof, belonging to the technical field of electrochemistry. Background technique [0002] In recent years, electrochemistry, as a green and environmentally friendly treatment technology with high energy efficiency and low secondary pollution, has been widely used in water treatment, waste gas treatment, and environmental monitoring and testing. In the field of water treatment, commonly used electrodes include metal electrodes, carbon material electrodes, gas electrodes, refractory salt electrodes, membrane electrodes, and chemically modified electrodes and multiple electrodes developed on the basis of the above electrodes. Among them, the chemically modified electrode attaches certain active groups, catalytic substances, etc. to the surface of the electrode, so that it has stronge...

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Problems solved by technology

According to the latest scientific research results, the membrane filtration process can effectively reduce membrane pollution under the action of an electric field. Therefore, in order to give full play to the membrane filtration performance of ceramic membranes and make them conductive, some scholars mostly use conductive titanium and iron. The method of firing metal powder as the raw material of the ceramic membrane, or the method of coating the surface of the ceramic membrane with a conductive modification material, so that the filter membrane can conduct electricity, but the appeal method is complicated due to the processing cost and the sintering process of the ceramic membrane. The pore size of the middle membrane is difficult to control, and the products produced either have poor conductivity or poor filtration performance, and the actual application effect is not ideal

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