Effect of conjugation degree and delocalized Π-system on the photocatalytic activity of single layer g-C3N4

Anye Shi, Huihui Li, Shu Yin, Bin Liu, Jiachi Zhang, Yuhua Wang

    Research output: Contribution to journalArticlepeer-review

    42 Citations (Scopus)

    Abstract

    Single layer g-C3N4 could be obtained from a protonic acid treatment of g-C3N4 or a new sandwich-like orientation growth of melamine. Through the self-assembly of melamine and polyacrylamide by hydrogen bonds and electrostatic interactions, g-C3N4, with extended planarized atomic single layer, exhibits superiority in both photocatalytic hydrogen evolution and photocatalytic degradation under visible light irradiation. Besides low efficiency, the acid exfoliation will destroy the delocalized π-system by inducing O atoms. The decrease of conjugation degree increases the optical gaps, making it hard for g-C3N4 to capture photons. On the contrary, the facile sandwich-like orientation growth of melamine highly keeps the conjugation degree of g-C3N4 and extends its delocalized π-system. Such single layer g-C3N4 is more active even better than N-doped TiO2 under visible light irradiation.

    Original languageEnglish
    Pages (from-to)137-146
    Number of pages10
    JournalApplied Catalysis B: Environmental
    Volume218
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Conjugation degree
    • Delocalized π-system
    • Photocatalyst
    • Single layer
    • g-CN

    ASJC Scopus subject areas

    • Catalysis
    • Environmental Science(all)
    • Process Chemistry and Technology

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