Synthesis of graphene sheets from graphite flake mediated with extracts of various indigenous plants from Madagascar

• Main Authors: Andrianiaina, H., Razanamahandry, L.C., Sackey, J., Ndimba, R., Khamlich, S., Maaza, M.
• Format: Conference Proceeding
• Language: English
• Subjects: Catharanthus roseus; Cedrelopsis grevei Baill; Cinnamomum camphora cineoliferum; Graphene nanosheets; Phyllarthron madagascariense; Raman shift; XRD
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2020.05.327

Graphene, a single layer graphitic based material, is nowadays the most promising and studied material due to its unique physical and chemical properties [1]. The “top-down” method of synthesizing graphene from graphene oxide (GO) by chemical reduction is the most economical and efficient method. Oxygen based components of GO, such as epoxide, carbonyl, carboxyl and hydroxyl groups have to be eliminated, as much as possible to be more closed to a monomolecular layer of graphite. However, chemical reducing agents, such as hydrazine, are harsh and environmentally unfriendly to be used for large scale production [8]. Madagascar has great varieties of indigenous plants, some of them have a power to heal illness and cancers [16], and used as herbal medicine by traditional health practitioners. This study will complete all reports done on bio-synthesis of graphene by green chemistry process [1]. Hence, physical and optical properties of the obtained graphene sheets mediated by Catharanthus roseus (CR), Phyllarthron madagascariense K. Schum (PM), Cinnamomum camphora cineoliferum (CCC), Cedrelopsis grevei Baill (CGB) and Artemisia annua (AA) natural extracts are reported on this work. Optical and physical properties of the obtained graphene sheets through Raman shift and X-Ray diffraction spectroscopy, confirmed the reduction and conversion of the bulk graphitic material to few-layered reduced graphene oxide. Hence, bio-active compounds extracted from Catharanthus roseus (CR), Phyllarthron madagascariense K. Schum (PM), Cinnamomum camphora cineoliferum (CCC), Cedrelopsis grevei Baill (CGB) and Artemisia annua (AA), can be used and are effective chelating agent for the synthesizing of graphene sheets.