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Schematic of Au/AgBr-Ag heterostructure mechanism for improved photocatalytic performance. (a) Semiconductor-excited (AgBr) electron transfer to metal (Au or Ag) NPs. (b) Plasmon-excited electron (Au or Ag) transfer to semiconductor (AgBr) NPs (e− = electron, h+ = hole, Ef = Fermi energy, M = Au or Ag). (c) General reaction involved in mechanism of Au/AgBr-Ag heterostructure. Reprinted with permission from [103], copyright 2017 Royal Society of Chemistry.
