Reduction and modification of graphene derivatives with bioactive compounds

Amongst them, gallic acid (GA) and tannic acid (TA) are known to have strong antioxidant activity and can act as reducing and stabilizing agents of GO, resulting in reduced graphene oxide (rGO) derivatives with improved properties such as solubility in organic solvents, thermal stability and mechanical performance.

Polyphenols act as crosslinkers between the GO nanosheets, leading to higher thermal resistance and improved stiffness, strength and toughness. A synergistic effect of both GO and polyphenols on inhibiting bacterial growth has also been found. The Π-Π and H-bonding interactions are believed to be the reason for the improved properties.