Eco - friendly synthesis of Pt nanoparticles by plant extract

Eco-friendly synthesis is a strategy to reduce the formation of harmful chemical products by using environment conscious synthesis procedures. One of the green methods for avoiding pollution is plant-mediated synthesis. In plant-mediated synthesis of nanoparticles, plant parts like leaf, bark, fruit, gum, and tuber are utilized as the reducing and stabilizing agent for the conversion of metal precursor to nano sized particles. Terpenoids, flavonoids, alkaloids, tannins, and phenols are identified in almost all part of a plant, including flowers, leaves, fruits, and roots, and can act as both reducing and stabilising agents. Plants such as Anacardium occidentale [1], Antigonon leptopus[2], Azadirichta indica [3], Cacumen platycaldi [4], Camellia sinensis [5], B. prioitis [6], Fumariae herba [7], Gloriosa superb [8], Doipyros kaki [9], Pinus resinosa [10], Phoenix dactylifera [11], Lantana camara [12], Terminalia chebula [13], Prunus xyedoensis [14], Punica granatum [15] have been reported as reducing agent and stabilizing agent for the synthesis of Pt NPs. Size of the plant based synthesized Pt NPs were in the range of 0.83 to 190nm with spherical, irregular rods, circular, hexagonal, monodispersed and spherical shapes. Biosynthesized PtNPs from B. prioitis were found to have significant cytotoxic effects on the MCF7 breast cancer cell line [6]. Phoenix dactylifera PtNPs were found to have antibacterial activity against B. subtilis and E. coli. The production of circular-shaped PtNPs with an average size of 10–50 nm from Pinus yedoensis tree gum extract was found to have effective antifungal activity [14].