Abstract
It is universally known that the preparation of high quality graphene on a large scale and in a cost-effective manner is essential for many technological applications. Graphene oxide (GO) has emerged as the precursor of choice for bulk production of graphene-based materials, as it can be synthesized from inexpensive graphite powders. In this paper, a simple method is described for reduction of GO solution by a free and green irradiation based technique. The majority of oxygen-containing functional groups of GO are removed by sun light. This methodology provides an effective way to quantitatively produce high quality graphene sheets. This paper presents irradiation by sun light of synthesized graphene oxide nano-flakes prepared by Hummer’s method. These nano-flakes have been successfully reduced while the dynamic of this irradiation process is discussed. The irradiated nano-flakes of graphene oxide have been investigated using X-Ray diffraction, ATR-FTIR and UV-Vis-NIR.
Highlights
Graphene is an allotrope of carbon, a flat monolayer of carbon atoms tightly packed into a two-dimensional (2D)How to cite this paper: Nyangiwe, N.N., Khenfouch, M., Thema, F.T., Nukwa, K., Kotsedi, L. and Maaza, M. (2015) FreeGreen Synthesis and Dynamics of Reduced Graphene Sheets via Sun Light Irradiation
It is universally known that the preparation of high quality graphene on a large scale and in a cost-effective manner is essential for many technological applications
Graphene oxide (GO) has emerged as the precursor of choice for bulk production of graphene- based materials, as it can be synthesized from inexpensive graphite powders
Summary
Graphene is an allotrope of carbon, a flat monolayer of carbon atoms tightly packed into a two-dimensional (2D). Chemical and mechanical properties [1] [2] It is the first known two-dimensional material which has a singular band structure, and its valence band and conduction band are touching each other [1]. This most talked about material is mostly uncounted in nature in the form of graphite, which is merely a stack of graphene layers held together by van der Waals interactions [1]. The majority of oxygen-containing functional groups of GO are removed by sun light This methodology provides an effective way to quantitatively produce high quality graphene sheets via the solar irradiation of graphene oxide solutions
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