▎ 摘　　要

NOVELTY - Preparing facile production of functionalized graphene sheets using seaweed biomass as precursor and deep eutectic solvents acting as both catalyst and template, comprises: (i) crushing the seaweeds mechanically to yield a liquid and residue in granular form; (ii) separating the liquid part from the residual part; (iii) obtaining the residual part in the granular form from the step (ii); and (iv) treating the granules obtained in the step (iii) with deep eutectic solvents followed by pyrolysis under inert atmosphere and high temperature which produces functionalized graphene sheets. USE - The process is useful for preparing facile production of functionalized graphene sheets. ADVANTAGE - The process provides functionalized graphene samples that have: reasonably good porosity of 2.7-4.1 nm characteristic of mesoporous material suitable for electrical double layer capacitors; good electrical conductivity of 2384-2400 mS.m-1; and reasonably high Brunauer-Emmett-Teller surface area of 120-225 m2/g (claimed).