Graphene oxide coupled carbon nitride homo-heterojunction photocatalyst for enhanced hydrogen production

Mohammad Rahman, Jun Zhang, Youhong Tang, Kenneth Davey, Shizhang Qiao

    Research output: Contribution to journalArticlepeer-review

    24 Citations (Scopus)

    Abstract

    This contribution reports the synthesis, characterization and application of a new ternary homo-heterojunction photocatalyst for improved hydrogen production via water-splitting. The heterostructure is constructed by soft-grafting of graphitic carbon nitride (GCN) and graphene oxide (GO) into an amorphous carbon nitride (ACN) substrate. In this ternary hybrid, a cascaded redox-junction is formed that significantly facilitates the separation of photogenerated electron-hole pairs (EHPs), retards EHP recombination and shuttles electrons to the photocatalyst/liquid interface for proton reduction reactions. When deposited with 3 wt% Pt as a cocatalyst, this new photocatalyst exhibits hydrogen production of 251 μmol h-1 from 10 vol% aqueous triethanolamine solution under visible light (420 nm) irradiation with an apparent quantum efficiency of 6.3%. This ternary photocatalyst therefore outperforms stand-alone/binary photocatalysts and promises to be a viable alternative to metal-based photocatalysts.

    Original languageEnglish
    Pages (from-to)562-571
    Number of pages10
    JournalMaterials Chemistry Frontiers
    Volume1
    Issue number3
    DOIs
    Publication statusPublished - 2017

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