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Paper   IPM / Physic / 15074
School of Physics
  Title:   ZnO quantum dots-graphene composites: formation mechanism and enhanced photocatalytic activity for degradation of methyl orange dye
1.  A. Tayyebi
2.  M. Tayebi
3.  A. Shafikhani
4.  SS. Sengör
  Status:   Published
  Journal: Journal of Alloys and Compounds
  Vol.:  663
  Year:  2016
  Pages:   738-749
  Supported by:  IPM
The current study demonstrates homogenous decorating of zinc oxide quantum dots (QDs) onto graphene oxide (GO) surface via simple chemical method. The AFM image exhibited that the prepared graphene was 0.8 nm thick and hence practically monolayer. Average size of the ZnO QDs was estimated by transmission electron microscopy around 3 nm. Instrumental and chemical analyses demonstrated formation of a strong bond between ZnO QDs and GO, through C�??O�??Zn and C�??Zn bridges. The UV-visible spectra displayed that the introduction of graphene sheets to ZnO QDs resulted in higher absorption intensity of UV as well as widening of adsorption window toward visible light for ZnO-Graphene due to chemical bond between ZnO QDS and graphene surface. Results showed that adding of graphene up to 30

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