A method for preparing electrodes by plasma spraying of Ce or Eu modified Ti4O7 powder with Ti.

Electrodes prepared by plasma spraying Ti with Ce or Eu modified Ti4O7 powder solve the problems of poor bonding and few active sites in Ti4O7-based electrodes, improve ammonia nitrogen degradation efficiency and electrode stability, and are suitable for the efficient treatment of ammonia nitrogen wastewater from rare earth mines.

CN122279461APending Publication Date: 2026-06-26GANNAN NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GANNAN NORMAL UNIV
Filing Date
2026-02-12
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing Ti4O7-based electrode coatings have poor adhesion to the substrate, few active sites, and low ammonia nitrogen degradation efficiency. Furthermore, traditional electrodes are prone to corrosion and have short lifespans, making it difficult to meet the industrial treatment needs of ammonia nitrogen wastewater from rare earth mines.

Method used

The method of preparing electrodes by plasma spraying Ti with Ce or Eu modified Ti4O7 powder improves the bonding strength and number of active sites of the electrode and optimizes the stability of the electrode structure through rare earth element doping and multi-step pretreatment.

Benefits of technology

It significantly improves the ammonia nitrogen degradation efficiency of the electrode, extends the service life of the electrode, reduces operation and maintenance costs, and is suitable for the efficient treatment of ammonia nitrogen wastewater from rare earth mines.

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Abstract

This invention provides a method for preparing Ti electrodes by plasma spraying Ce or Eu modified Ti4O7 powder, relating to the field of electrode preparation technology. The method includes the following steps: S1. Taking Ti4O7 powder, weighing the corresponding mass of CeCl3・6H2O or EuCl3・6H2O at a doping ratio of 1 at% to 3 at%, mixing it with the Ti4O7 powder, and then immersing it in ultrapure water; S2. sequentially polishing the Ti substrate with 400-mesh and 600-mesh sandpaper, and ultrasonically cleaning it with deionized water for 20-30 minutes; S3. Using a plasma spraying system, spraying the Ce / Eu-doped Ti4O7 powder obtained in S1 onto the surface of the pretreated Ti substrate obtained in S2. Electrodes prepared by rare earth doping and plasma spraying processes have significantly increased the number of active sites, greatly optimized ammonia nitrogen degradation efficiency, and achieved a tight bond between the coating and the substrate. This enhances the electrode's corrosion resistance and stability, and the preparation process is environmentally friendly, making it suitable for industrial ammonia nitrogen wastewater treatment needs.
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