Ni monatomic / phosphorus / g-c3n4 composite material and preparation method and application thereof

By doping phosphorus and Ni single atoms onto hollow tubular g-C3N4, a Ni single atom/phosphorus/g-C3N4 composite material is formed, which solves the problems of narrow photoresponse range and high recombination rate of photogenerated carriers in g-C3N4 photocatalyst, and achieves efficient photocatalytic water splitting to produce hydrogen.

CN122124843AActive Publication Date: 2026-06-02SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV
Filing Date
2026-04-30
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing graphitic carbon nitride (g-C3N4) photocatalysts have a narrow photoresponse range, high recombination rate of photogenerated carriers, small specific surface area, and low electrical conductivity, resulting in photocatalytic water splitting efficiency lower than the industrial standard.

Method used

A Ni single-atom/phosphorus/g-C3N4 composite material is used. By doping phosphorus and Ni single atoms on a hollow tubular g-C3N4 matrix, a cooperative electronic configuration is formed, which promotes charge separation and transport.

Benefits of technology

It significantly improved the photocatalytic hydrogen production performance, achieving a hydrogen production rate of 2707.7 μmol h⁻¹g⁻¹ and an apparent quantum efficiency of 8.8%, and exhibited excellent stability in 6 photocatalytic hydrogen production cycles.

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Abstract

This invention relates to the field of photocatalyst technology, specifically to a Ni single-atom / phosphorus / g-C3N4 composite material, its preparation method, and its applications. The Ni single-atom / phosphorus / g-C3N4 composite material provided by this invention uses hollow tubular g-C3N4 as a matrix, simultaneously doped with phosphorus and Ni single atoms. Results show that simultaneous doping with phosphorus and Ni single atoms can effectively regulate the electronic configuration of g-C3N4, expand visible light absorption, and promote charge separation and transfer. The hydrogen production rate of the Ni single-atom / phosphorus / g-C3N4 composite material can reach 2707.7 μmol / h. ‑1 g ‑1 The concentrations were approximately 615.4 μmol / h of pure g-C3N4. ‑1 g ‑1 ), phosphorus-doped g-C3N4 composite material (1602.2 μmol h) ‑1 g ‑1 The apparent quantum efficiency of the composite material is 4.4, 1.7, and 1.5 times that of the Ni single-atom doped g-C3N4 composite material; it has an apparent quantum efficiency of 8.8% at 400 nm and exhibits excellent stability in 6 photocatalytic hydrogen production cycles.
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