光催化
八面体
异质结
可见光谱
材料科学
化学工程
光化学
纳米技术
光电子学
化学
结晶学
晶体结构
催化作用
有机化学
工程类
作者
Wei Qi,Yang Wang,Haiying Qin,Jin‐Ming Wu,Youyi Lu,Hongzhong Chi,Fan Yang,Bin Zhou,Houlin Yu,Jiabin Liu
标识
DOI:10.1016/j.apcatb.2018.01.003
摘要
Abstract 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.
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