A method for preparing and applying a photocatalyst based on a naphthalimide derivative.

By introducing functional groups containing heteroatoms such as nitrogen and phosphorus into naphthalimide derivatives and performing acid-base induced self-assembly, the problems of band structure regulation and carrier migration of naphthalimide in photocatalytic water splitting were solved, and efficient and stable photocatalytic water splitting performance was achieved.

CN122127366APending Publication Date: 2026-06-02NORTHEAST GASOLINEEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHEAST GASOLINEEUM UNIV
Filing Date
2026-01-21
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies struggle to precisely control the band structure of naphthalimide, enhance interfacial reactivity, and promote directional carrier migration through precise molecular design and preparation routes, resulting in insufficient overall water splitting capacity in photocatalytic water splitting.

Method used

A naphthalene imide framework was formed by reacting 1,4,5,8-naphthalenetetracarboxylic anhydride with an amino-containing functional monomer in a molten imidazole medium. A highly ordered nanostructure was constructed by using an acid-base induced molecular self-assembly strategy. Functional groups containing heteroatoms such as nitrogen and phosphorus were introduced to optimize the band structure and light absorption range.

Benefits of technology

Precise control of the band structure was achieved, improving charge separation and transport efficiency, enhancing catalyst stability and surface reaction kinetics, and improving the overall water splitting performance of the photocatalyst.

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Abstract

This invention relates to the field of photocatalytic materials technology, and particularly to a method for preparing and applying photocatalysts based on naphthalimide derivatives. The preparation method uses 1,4,5,8-naphthalenetetracarboxylic anhydride and aminomethylphosphonic acid as reactants, undergoing a condensation reaction under heating conditions to obtain a naphthalimide precursor with phosphonic acid methyl side chains. Subsequently, molecular self-assembly is induced through an alkaline dissolution-acid precipitation process to construct a phosphate-based naphthalimide supramolecular photocatalyst with a regular one-dimensional nanorod morphology. During the self-assembly process, the strong π–π stacking between the naphthalimide backbone forms continuous charge transport channels, and the phosphonic acid groups stabilize the supramolecular structure and improve interfacial reaction performance through hydrogen bonding interactions, thereby synergistically enhancing the separation and utilization efficiency of photogenerated carriers. Under full-spectrum illumination, this photocatalyst can achieve efficient overall water splitting and simultaneously produce hydrogen and oxygen, making it suitable for photocatalytic water splitting for hydrogen production and solar energy conversion technologies.
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