Synthesis of potential antioxidants by synergy of ultrasound and acidic graphene nanosheets as catalyst in water

- The Graphene-SO3H was prepared via simple chemical process.
- The Graphene-SO3H was characterized using FESEM, TEM, AFM, Raman, FT-IR, and TGA.
- The catalyst can be recovered five cycles without any loss of catalytic activity.
- The Graphene-SO3H was employed in synthesis of antioxidantly active compounds in water.