Molten salt method modified rod-like graphite phase carbon nitride material as well as preparation method and application thereof

Modified rod-shaped graphitic carbon nitride materials were prepared by the molten salt method, which solved the problems of insufficient photocatalytic activity and high cost in the existing technology, and achieved efficient and low-cost photocatalytic hydrogen production, which is suitable for photocatalytic water splitting to produce hydrogen.

CN122298465APending Publication Date: 2026-06-30CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202411879189.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing graphitic carbon nitride materials suffer from low visible light utilization, small specific surface area, and severe recombination of photogenerated carriers, resulting in insufficient photocatalytic activity. Furthermore, traditional modification methods are costly and unsuitable for industrial applications.

Method used

Modified rod-shaped graphitic carbon nitride materials were prepared by molten salt method. By grinding and compounding nitrogen-containing precursors with alkali metal salts and then calcining them, a modified catalyst with a smooth surface and microporous structure was prepared, avoiding the addition of metal elements and complex processing steps.

Benefits of technology

It significantly improves the visible light photocatalytic hydrogen production activity and stability of the material, reduces the preparation cost, is suitable for large-scale production, and exhibits excellent hydrogen production performance in both whole and half water splitting systems.

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Abstract

The invention discloses a rod-like graphite phase carbon nitride material modified by a molten salt method as well as a preparation method and application of the rod-like graphite phase carbon nitride material. The rod-like graphite phase carbon nitride material has a proper defect structure, and the microstructure of the rod-like graphite phase carbon nitride material is rod-like. In a water decomposition hydrogen production performance test, the hydrogen production performance of the catalyst is remarkably improved compared with that of original g-C3N4, the hydrogen production rate of the catalyst in a photocatalytic full water splitting experiment can reach 1.75 mmol.g <-1 >. H <-1 > at most, the hydrogen production rate of the catalyst in a photocatalytic half water splitting experiment with a trace amount of sacrificial agent can reach 4.39 mmol.g <-1 >. H <-1 > at most, and the hydrogen production rate of the catalyst in a photocatalytic half water splitting experiment with a trace amount of sacrificial agent can reach 1.75 mmol.g <-1 >. H <-1 > at most. The preparation method has the advantages of being single in material, simple in process, low in cost, easy to control and the like, and industrial application is facilitated.
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