There is an increasing commercial demand for nanoparticles due to their wide applicability in various areas such as electronics, catalysis, chemistry, energy, and medicine. Metallic nanoparticles are traditionally synthesized by wet chemical techniques, where the chemicals used are quite often toxic and flammable. In this work, we describe a cost effective and environment friendly technique for green synthesis of magnesium doped zinc nanoparticles using the plant extract of Calotropis.

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... s plant extract used first time as reducing agent as well as capping agent. The magnesium doped zinc nanoparticles were achieved by using high purity metal sulphates and Calotropis plant extract. The synthesis of nanoparticles was confirmed by changing the color from light brown to green within 1 hour of reaction. The further study of formation of magnesium doped zinc nanoparticles was confirmed by UV-Vis, FTIR, XRD, EDX, and SEM. The formation of zinc oxide phase was also confirmed by FT-IR. X-ray diffraction studies confirmed the crystalline nature of the nanoparticles indicating particle size within the range provided by electron microscopy data. The energy dispersive X-ray analysis confirmed the presence of Mg ion in the doped Zn lattice and scanning electron microscopy reveals the spherical morphology of nanoparticles. The antimicrobial activities of nanoparticles (NPs) were studied against fungi, gram-positive and gram-negative bacteria using the well diffusion method. The detailed characterization will be discussed here.