Maha Adil Mohamed Ali2022-08-212022-08-212019http://hdl.handle.net/123456789/17251In this research silver nanopatticles (AgNPs) were synthesized by green method. Two set of samples were prepared using Neem leave extract as reducing and capping agent, silver nitrate (AgNO3) of different concentration (1 mM, 3 mM, and 5 mM) in addition to Gum Arabic as stabilizer .The AgNPs were used in detection of lead in water. structural and crystalline properties were carried out of the synthesized samples using X-ray diffraction (XRD), that confirmed the structure of AgNps and revealed that the structure of these nanoparticles is face-centered cubic (fcc). UV-Vis spectroscopy determined the surface plasmon resonance of AgNPs; the peaks of resonances of samples were appeared at 438-456 nm range. The surface morphology and the particle size of AgNPs was studied using Scanning Electron microscope (SEM), SEM images showed that most of AgNPs were spherical in shape with an average radius in the range of 13-l4 nm. for both set of samples, with different concentration. However, addition of Gum Arabic reduced the particle size and agglomeration. The detection of lead in water was observed by direct color change of the solution when lead added to the water and confirmed by absorption spectrum deduced by uv-vis spectroscopy.enNanoparticlesSilverThesis