Preparation Of Water-soluble Dye-sensitized Graphene Nano-composites And Study Of Their Photovoltaic Property

This work reports the preparation of graphene oxide mono-atomic layer crystal and its structure characterization. And also propose a route to prepare a long-term sustainable reduced graphene oxide crystal suspension by compositing with methylene blue. Absorption spectra and nuclear magnetic resonance spectra study prove theπ-πinteraction between methylene blue and graphene. Fluorescence spectra and electrochemistry investigation indicate the existence of electron transfer and photo-induced electron transfer process between methylene blue and graphene. The photovoltaic property of this nanocomposite was supported by the photocurrent response of its film in a photoelectrochemical cell. All the results of this study indicate an electron pull-push dipolar structure, in which methylene blue is an electron-donor and graphene is an electron-acceptor, exists among the nanocomposite. Such a nanocomposite holds potential for light-harvesting and sensor application.