Functionalization of graphene oxide by using perylenediimide: An efficient visible-light driven sensitizer for photocatalytic reaction

摘要

Herein an effective and facile approach for introducing photoactive and stable hybrid of graphene oxide (GO) and perylenediimide (PDI) was presented. For this purpose, we have synthesized amidated GO and then by reaction between amidated GO and asymmetric PDI, hybrid (GNP) was produced. The studies on the stability and on the dispersibility of this hybrid showed that the GNP hybrid is stable and dispersible in aqueous solution. This hybrid considered as a sensitizer for photocatalytic process due to its stability in aqueous solution and visible light absorption. Then a series of GNP/TiO2 nanocomposites (TGNP) with different percentage of GNP were prepared by solvothermal method, and the structure, morphology, thermal stability, electrochemical properties and photocatalytic activity of these new materials were systematically investigated. This strategy can be extended to many other organic and inorganic semiconductors, which opens new possibilities for high-efficiency graphene-based solar energy conversion.