HF acid treatment induced nitrogen vacancies enriched g-C3N4 for efficient photocatalytic CO2 reduction and hydrogen production

[Display omitted] •Nitrogen vacancies enriched g-C3N4 was prepared.•Introduction of nitrogen vacancies enlarges specific surface area.•The recombination rate of photogenerated carriers was inhibited.•Activity of nitrogen vacancies enriched g-C3N4 was improved. In this study, g-C3N4 was synthesized b...

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Bibliographic Details
Published in:Chemical physics letters 2025-02, Vol.861, Article 141818
Main Authors: Su, Xun, Xu, Zhengdong, Li, Minjiao, Zhong, Junbo
Format: Article
Language:English
Subjects:
g-C3N4
Nitrogen vacancies
Photocatalytic CO2 reduction
Photocatalytic hydrogen evolution
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Summary:[Display omitted] •Nitrogen vacancies enriched g-C3N4 was prepared.•Introduction of nitrogen vacancies enlarges specific surface area.•The recombination rate of photogenerated carriers was inhibited.•Activity of nitrogen vacancies enriched g-C3N4 was improved. In this study, g-C3N4 was synthesized by calcining urea in a muffle furnace, and then g-C3N4 was treated by hydrofluoric acid (HF) acid. HF etching can increase the specific surface area of g-C3N4 and introduce enriched N vacancies. The presence of N vacancies can expose a number of active sites for photocatalytic reactions, accelerate the separation speed of photocarriers, and thus improving the efficiency of photocatalytic reactions. Compared to the reference g-C3N4, photocatalysts treated by HF acid demonstrate boosted photocatalytic activity. This work offers beneficial references for introducing vacancies into g-C3N4 using a facile strategy.
ISSN:0009-2614
DOI:10.1016/j.cplett.2024.141818