The Optical and structural properties of Graphene nanosheets and Tin oxide nanocrystals composite

摘要

A nanocomposite material consisting of metal oxide and reduced graphene oxide was prepared via simple, economic, and effective chemical reduction method. The synthesis strategy was based on the reduction of GO with Sn~(2+) ion that combines tin oxidation and GO reduction in one step, which provides a simple, low-cost and effective way to prepare graphene nanosheets/Sn02 nanocrystals composites because no additional chemicals were needed. SEM and TEM images shows the uniform distribution of the SnO_2 nanocrystals on the Graphene nanosheets (GNs) surface and transmission electron microscope shows an average particle size of 2- 4 nm. The mean crystallite size was calculated by Debye Scherrer formula and was found to be about 4.0 nm. Optical analysis was done by using UV-Visible spectroscopy technique and the band gap energy of the GNs/SnO_2 nanocomposite was calculated by Tauc relation and came out to be 3.43eV.