g-C3N x @CN composite preparation and its photocatalytic degradation property under visible light

Yiren ZHU, Chunpeng HE, Xuetong NIE, Zhong GAO, Ying LI

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Journal of Materials Engineering ›› 2025, Vol. 53 ›› Issue (5) : 159-167. DOI: 10.11868/j.issn.1001-4381.2024.000080
RESEARCH ARTICLE

g-C3N x @CN composite preparation and its photocatalytic degradation property under visible light

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Abstract

A photocatalyst g-C3N x @CN with defective carbon nitride （g-C3N x ） encapsulated by CN shells is prepared by in-situ growth and high-temperature dezincification. The structural， morphological， and compositional characterization of g-C3N x @CN has been analyzed and characterized by various analytical means. First， g-C3N x with nitrogen defects is prepared by high-temperature polycondensation of melamine and high-temperature denitration of Mg powder， followed by in-situ growth of ZIF-8 by loading ZnO nanoparticles. Finally， g-C3N x @ZIF-8 is dezincified at high temperature， and the CN shell-encapsulated visible light catalyst material g-C3N x @CN with double defects （N， Zn） with ZIF-8 is prepared. The study demonstrates that the g-C3N x @CN catalyst exhibits strong visible photocatalytic activity and effectively degrades methylene blue and 2，4-dichlorophenol within 240 min， with the best performance of the g-C3N x @CN-5∶4 composite. The single linear oxygen （1O2） plays a dominant role in the reaction system. In the cycle test， the g-C3N x @CN shows excellent recycling and light stability. This study extends the study of defective carbon nitride materials in visible light absorption and provides a viable method for the derivation of metal catalysts to inorganic non-metal catalysts.

Key words

g-C3N x / ZIF-8 / photocatalysis / degradation / methylene blue / 2，4-DCP

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Yiren ZHU , Chunpeng HE , Xuetong NIE , et al . g-C3N x @CN composite preparation and its photocatalytic degradation property under visible light. Journal of Materials Engineering. 2025, 53(5): 159-167 https://doi.org/10.11868/j.issn.1001-4381.2024.000080

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