title: Performance enhancement of ZnO photocatalyst via synergic effect of surface oxygen defect and graphene hybridization.
abstract: ZnO1-x/graphene hybrid photocatalyst was prepared via a facile in-situ reduction of graphene oxide and ZnO1-x surface defect oxide. The hybrid photocatlayst showed enhanced photocatalytic activity for the photodegradation of methylene blue. The photocorrosion of ZnO1-x was successfully inhibited by graphene hybridation. ZnO1-x/graphene hybrid photocatalyst with 1.2 wt % graphene showed the optimized photocatalytic activity. The photocatalytic activity of ZnO1-x/graphene-1.2 wt % under visible and UV light was about 4.6 and 1.2 times that of ZnO1-x sample, respectively. The photocurrent intensity of ZnO1-x under visible and UV light irradiation can be enhanced by 2 and 3.5 times by graphene hybridization. The enhancement of photocatalytic activity and photocurrent intensity in ZnO1-x/graphene was attributed to the synergistic effect between graphene and ZnO1-x for high separation efficiency of photoinduced electron-hole pairs mainly resulting from the promotion of HOMO orbit of graphene and the Oi″ defect level of ZnO1-x in ZnO1-x/graphene.
authors: Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China.
authors: Xiaojuan
authors: X
authors: Bai
authors: Li
authors: L
authors: Wang
authors: Ruilong
authors: R
authors: Zong
authors: Yanhui
authors: Y
authors: Lv
authors: Yiqing
authors: Y
authors: Sun
authors: Yongfa
authors: Y
authors: Zhu
mesh_terms: D017151:Antibodies, Catalytic; D006108:Graphite / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry; D055620:Optical Phenomena; D010100:Oxygen / Q000737:chemistry*; D010782:Photolysis; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D017151:Antibodies, Catalytic; D006108:Graphite; D010100:Oxygen; D015034:Zinc Oxide; D008751:Methylene Blue