Microporous titanium-based iridium tantalum whole-body electrode applied to advanced treatment of chemical tail water as well as preparation method and application of microporous titanium-based iridium tantalum whole-body electrode

Abstract

The invention discloses a microporous titanium-based iridium tantalum whole-body electrode applied to advanced treatment of chemical tail water as well as a preparation method and application of the microporous titanium-based iridium tantalum whole-body electrode, and belongs to the field of preparation of electrochemical electrodes. According to the microporous titanium-based iridium-tantalum whole-body electrode, firstly, titanium powder is subjected to iridium-tantalum composite modification, and then evenly-distributed titanium-based iridium-tantalum particles are subjected to pressure casting to form a pipe through a pore diameter control pressure casting method with inert gas at a certain flow speed as a pressure transmission medium. According to the anode prepared by the invention, the active sites of the electrode are greatly increased, the collision probability of pollutants in the chemical tail water and the electrode is improved, the anode has a membrane filtration effect, the mass transfer effect of the electrode is improved, the pollutants can quickly reach the electrode, the degradation efficiency of the pollutants is improved, and the service life of the electrode is prolonged; meanwhile, the pore diameter of the micropores can be controlled through a pore diameter control pressure casting method adopting inert gas with a certain flow speed as a pressure transmission medium, and the method can be better applied to treatment of chemical tail water containing low-concentration refractory organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic electrode preparation, and in particular relates to a microporous titanium-based iridium-tantalum through-body electrode used for advanced treatment of chemical tail water, and a preparation method and application thereof. Background technique [0002] Since the electrochemical catalysis technology was proposed in the 20th century, with the rapid development of the electrode industrial manufacturing level, the electrochemical water treatment technology has been rapidly developed and improved. In the face of the increasingly severe environmental protection situation, especially the continuous improvement of wastewater resource requirements, the types of pollutants in wastewater are constantly increasing, and the existence of persistent refractory pollutants leads to extremely harsh wastewater conditions. Electrochemical technology is still After comprehensive application range, input cost ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the outstanding problems of low residual concentration of pollutants in the tail water produced after secondary treatment in the chemical industry, difficulty in pollutant degradation, and limited mass transfer efficiency caused by diffusion control bottlenecks in the electrochemical catalytic oxidation process, the present invention provides a A method for preparing a microporous titanium-based iridium-tantalum full-body electrode applied to the advanced treatment of chemical tail water. In this method, an inert gas with a certain flow rate is used as a pressure transfer medium to die-cast on a hot isostatic press, and the surface of the prepared whole-body electrode has a certain distribution. The micropores of the pore size, and the exposed surface of the microporous titanium-based iridium-tantalum whole-body electrode is covered with an iridium-tantalum oxide active layer, which effectively expands the area of ​​the active layer in contact with the fluid, and further strengthens the mass transfer between pollutants and electrodes Process, breaking through the bottleneck of pollutant diffusion control, can effectively improve mass transfer efficiency;

[0008] The further purpose is to solve the problem of short service life caused by the stress shedding of the electrode active layer and titanium substrate caused by the long-term operation of the traditional titanium-based coated electrode under high-current extreme medium conditions, and provide a high mass transfer efficiency and long service life. The microporous titanium-based iridium-tantalum full-body electrode, the electrode is used to directly modify the active layer on the titanium powder particles, and then the obtained titanium-based iridium-tantalum powder is subjected to aging die-casting to form a microporous titanium-based iridium-tantalum full-body electrode, with particles as the unit The iridium-tantalum modification can further strengthen the binding force between the active layer and the substrate, effectively prevent the active layer from falling off, and prolong the service life of the electrode

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