METHODS FOR PRODUCING GRAPHENE WITH TUNABLE PROPERTIES BY A MULTI-STEP THERMAL REDUCTION PROCESS

摘要

The present invention refers to process for the preparation of graphene which comprises the steps of a) flash thermal treatment of a graphite oxide at a temperature up to 700°C sufficient to produce exfoliation and under inert atmosphere; b) cooling the material obtained in the previous step below 90°C and c) heating the material resulting from the previous step under inert atmosphere at a temperature which is higher than the temperature of step a), wherein the heating rate is between 1 and 15°C/min. The invention is also directed to the graphenes so obtained, which show excellent physico-chemical properties.