Biogenic synthesis of Ag-Au-In decorated on rGO nanosheet and its antioxidant and biological activities

Au-Ag-In-rGO nanocomposite was synthesized using fruit extract of Zanthoxylum rhetsa which is an eco-friendly, simple and green method. It was characterized by UV-visible, FT-IR, XRD, XPS, EDX, TEM technique. The antioxidant capacity of the nanocomposite was evaluated in presence of AgNO3, HAuCl4 and InCl3 solution respectively at 25 degrees C. The results showed significant antioxidant activity in presence of 1 x 10(-5) mM AgNO3 solution. The antibacterial activity of Au-Ag-In-rGO nanoparticles was carried out against the gram -ve bacteria Pseudomonas aeruginosa, Escherichia coli and gram +ve bacteria Staphylococcus aureus and Bacillus cereus. The bacterial growth kinetics was studied. The bacterial strain E. coli and S. aureus showed complete inhibition at concentration 100 mu g ml(-1). The activity is more effective in case of Au-Ag-In-rGO compared to GO.