Discussing the Preparation Conditions of Graphene

摘要

The oxide reduction process of preparation graphene always accompanies the stirring process. The stirring speed affects the efficiency of sulfuric acid to access the graphite sheet, but also affects the efficiency of potassium permanganate to oxide the graphite and affects the reducer to reduce graphene oxide. So the stirring speed has a non-negligible efficiency to control the synthesis of graphene. Focusing on this problem, this study uses oxidation reduction to compound the graphene, changing stirring speed in the process of synthetic experiment in order to prepare different graphene dispersions, then the samples are go through FT-IR, Raman spectrum, transmission electron microscopy (TEM) and resistivity test analysis. The experiment results express that graphene's conductivity is much better when stirring speed is 300 r/min than other speed (100 and 500 r/min) in preparation. In addition, the order degree and the flatness of graphene layers are more excellent. The graphene at 500 r/min stirring speed preparation contains less oxygen groups.