Construction of rGO wrapping octahedral Ag-Cu2O heterostructure for enhanced visible light photocatalytic activity

By Qingli Wei, Yang Wang, Haiying Qin, Jinming Wu, Yang-Ming Lu, Hongzhong Chi, Fang Yang, Bin Zhou, Houlin Yu, Jiabin Liu. Applied Catalysis B: Environmental, 2018

147 citations recorded by the source corpus.

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.

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/f7a3a992b66201973d6ea9a64b9ddf2f544b9798