Graphene oxide/rosmarinic acid (GO-RA) nanocomposites were prepared by grafting modified graphene oxide (GO).GO-RA nanocomposites were characterized by FT-IR,UV-Vis,XRD,TGA,SEM and TEM,Escherichia coli(E.coli) and Staphylococcus aureus(S.aureus) were used as model bacteria to comprehensively evaluate the antibacterial properties of the nanocomposite through bacterial growth inhibition experiment and bactericidal rate test.The results showed that rosmarinic acid (RA) was successfully grafted onto GO.The inhibitory effect of GO-RA on the growth and reproduction of E.coli was stronger than that of GO,and the inhibitory effect of GO-RA on S.aureus was not different from that of GO.The bactericidal rates of GO-RA exposed to E.coli and S.aureus for 2 hours were 97.6% and 94.3%,respectively.Under the same conditions,compared with GO,GO-RA showed better antibacterial activity against the above two bacteria,and the sterilization rate increased by 19.3% and 5.5%,respectively.
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