A ternary reduced graphene oxide wrapped octahedral Ag-Cu₂O (Ag-Cu₂O/rGO) photocatalyst has been synthesized through a facile one-pot water bath method at 55 °C. The ternary Ag-Cu₂O/rGO composites possessed a novel heterostructure, in which Cu₂O octahedra were decorated with dense Ag nanoparticles and were wrapped with thin rGO nanosheets. The ternary Ag-Cu₂O/rGO photocatalyst exhibited much higher activity in photodegradations of phenol in water under visible light than either pure Cu₂O or binary Cu₂O/rGO or Ag-Cu₂O composites. The photo-excited electrons from Cu₂O transferred to rGO and Ag, leading to the separation of the electron-hole pairs. The incorporation of rGO not only suppressed the recombination of electron-hole pairs but also prevented the agglomeration of Ag nanoparticles. Ag nanoparticles played an important role in the photocatalysis owing to the surface plasmon resonance.

通过简便的一锅水浴法在55°C下合成了三元还原石墨烯包裹的八面体Ag-Cu ₂ O（Ag-Cu ₂ O / rGO）光催化剂。三元Ag-Cu ₂ O / rGO复合材料具有新颖的异质结构，其中Cu ₂ O八面体用致密的Ag纳米颗粒装饰，并包裹有薄的rGO纳米片。与纯Cu ₂ O或二元Cu ₂ O / rGO或Ag-Cu ₂ O复合材料相比，三元Ag-Cu ₂ O / rGO光催化剂在可见光下对水中苯酚的光降解具有更高的活性。来自Cu ₂的光激发电子O转移到rGO和Ag，导致电子-空穴对的分离。rGO的引入不仅抑制了电子-空穴对的重组，而且还防止了Ag纳米粒子的团聚。由于表面等离子体共振，Ag纳米颗粒在光催化中起重要作用。