The Effect of Different Reduction Methods on Conductivity of reduced-Graphene Oxide (r-GO)

摘要

Large quantity of graphene oxide (GO) was prepared by Modified Hummer's method, in which graphite was treated with a mixture of sulphuric acid, potassium permanganate and hydrogen peroxide. A chemically reduced graphene oxide (r-GO) was prepared using sodium borohydride (NaBH_4), followed by thermal treatment and thermal treatment of chemically reduce using NaBH_4. The electrical resistance of r-GO was measured using Keithley sourcemeter. The results revealed that r-GO show lower resistance on thermal reduction which is 2.39 kΩ compared to chemical reduction and thermal of NaBH_4 reduction which is 2.18 MΩ and 3.16 kΩ respectively. It can be concluded that thermal reduction is the best method to produce high conductivity r-GO film.