A method for preparing a g-C3N4 / NiO / FTO composite electrocatalytic thin film electrode

By compositing g-C3N4 onto a NiO film, a g-C3N4/NiO/FTO composite electrocatalytic thin film electrode was prepared, solving the problems of high energy consumption and high cost in the electrocatalytic decomposition of urea wastewater and achieving low-cost and high-efficiency electrocatalytic performance.

CN118420052BActive Publication Date: 2026-07-21CHINA UNIV OF GEOSCIENCES (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA UNIV OF GEOSCIENCES (BEIJING)
Filing Date
2024-04-28
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing methods for electrocatalytic decomposition of urea wastewater suffer from high energy consumption and high cost, especially when using precious metal platinum electrodes, and nickel-based materials exhibit high overpotentials during the electrocatalytic decomposition of urea.

Method used

A g-C3N4/NiO/FTO composite electrocatalytic thin film electrode was prepared by compositing graphitic carbon nitride (g-C3N4) onto a NiO thin film using a hydrothermal-immersion-calcination method. The g-C3N4 was used to reduce the onset potential and increase the current density.

Benefits of technology

It reduces the energy consumption and cost of electrocatalytic treatment of urea wastewater, improves the electrocatalytic performance of the electrode, increases the reaction current density, and reduces the onset potential.

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Abstract

The application discloses a preparation method of a g-C3N4 / NiO / FTO composite electrocatalytic film electrode and belongs to the technical field of material preparation. The g-C3N4 is composited on the NiO film by using a simple soaking-calcination method, in the process of electrocatalytic treatment of urea wastewater, the problem of high energy consumption of the traditional treatment method is solved, the cost of treating urea wastewater is lower due to the replacement of the noble metal electrode, and the electrocatalytic reaction has a lower starting potential and higher electrocatalytic performance. The method has the advantages of strict controllable preparation conditions, simple equipment and process, low cost and the like. The obtained product electrode has an interactive connected willow leaf cross network structure and is uniformly distributed, and has a good application prospect in electrolysis of urea wastewater and the like.
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