A preparation method of a pyrite particle electrode based on a mechanochemical method

By modifying pyrite particle electrodes using a room-temperature wet mechanical-chemical method and a low-temperature ion crosslinking process, the problems of high charge transfer impedance and phase transition deactivation of natural pyrite in a three-dimensional electrode system were solved, achieving efficient and stable treatment of organic wastewater.

CN122444280APending Publication Date: 2026-07-24CHONGQING UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING UNIV
Filing Date
2026-06-11
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In existing technologies, when natural pyrite is used as a particulate electrode material, it suffers from high charge transfer impedance and difficulty in achieving high efficiency in three-dimensional electrode systems. Furthermore, traditional modification methods result in high energy consumption, mineral phase transformation deactivation, and difficulty in powder recovery.

Method used

A room-temperature wet mechanical chemical method is used to mix and ball-mill natural pyrite with biomass source to form biomass-modified pyrite composite powder. The powder is then macroscopically shaped through a low-temperature ion crosslinking process to construct a three-dimensional conductive mass transfer network, thus avoiding crystal transformation and loss of active sites caused by high-temperature treatment.

Benefits of technology

It achieves long-term stability and high catalytic activity of pyrite, reduces preparation energy consumption, improves the conductivity and mass transfer efficiency of the material, and is suitable for the application requirements of three-dimensional electrode systems.

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Abstract

The application discloses a preparation method of a pyrite particle electrode based on a mechanochemical method, and adopts a normal-temperature wet-type ball milling process to simultaneously perform particle size refining, surface defect construction and nitrogen-doped carbon coating on natural pyrite and defatted soybean powder in an organic solvent, so that the destruction of a crystal form caused by high-temperature treatment is avoided. Then, the obtained composite powder is mixed with acetylene black, and ion cross-linking forming is performed on sodium alginate and calcium chloride in a low-temperature environment, so that a particle electrode with a three-dimensional porous structure is prepared. The method solves the problems of easy agglomeration and loss of the powder and poor conductivity, and the prepared electrode exhibits excellent charge transfer performance and catalytic activity in a 3DERs-PS system, has high degradation efficiency on rhodamine B and good cycle stability, and realizes efficient treatment of organic wastewater.
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