▎ 摘　　要

NOVELTY - Synthesizing graphene-based materials, comprises a two-stage solvothermal process comprising an extract of parts of Drepanostachyum falcatum plant. The graphene-based materials are hydrophilic metal doped graphene oxide sheet (MDGO) and hydrophobic graphene nanoribbons (GNR). USE - The process is useful for synthesizing graphene-based materials, preferably 2D-MDGO and 3D-GNR (claimed) which is useful in the field of bioimaging and water treatment for removal of organic pollutants and e.g. textile dyes including methylene blue and brilliant green. ADVANTAGE - The process: utilizes different parts of the bamboo herb i.e. D. falcatum and provides the hydrophilic 2D/hydrophobic 3D graphene-based materials in a simple, rapid, economically feasible and eco-friendly manner; provides the 2D-MDGO sheets that are highly water-soluble and emit excellent bright blue fluorescence under UV light; provides the 3D-GNR that removes the organic pollutant (dyes e.g. brilliant green and methylene blue) and remediates water within a very short time span in an effective manner; and provides the graphene-based materials without requiring the need of any harmful/toxic acids, hence the process is safe and easy.