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Keywords:

  • graphene;
  • quantum dots;
  • nanowires;
  • photoelectrodes
Thumbnail image of graphical abstract

Graphene quantum dots (GQDs) are explored as a green sensitizer to functionalize ZnO nanowire arrays (GQDs@ZnO NWs) by covalently bonding GQDs on ZnO NWs that are grown on F-doped SnO2 glass and modified with amine groups. Using a Pt counter electrode, the GQDs@ZnO NWs photoelectrodes exhibit enhanced performance for photoelectrochemical water splitting.