Abstract
Graphene research has advanced a lot in the last decade. Scientists are currently developing methods to make high-quality materials with distinctive attributes. Solar cells, electronic devices, energy storage and sensors are some of the potential applications involving graphene and derivatives. However, the reduction and drying steps of graphene obtained may influence the material properties and its future applications. The present work proposes a comparison of reduced graphene by sustainable methods following two different drying techniques. Freeze-drying prevents the aggregation of reduced graphene sheets, resulting in 2 ∼ 3D reduced graphene oxides, while oven-drying reduced graphene results in a flexible and self-supporting thin film. Reduced graphene exhibited low oxygen content (7%), a low edge defect density and a high conductivity (2670 S cm-1).
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