علوم زیستی دریا
negar fadian behbahani; foad buazar
Abstract
Recently, there is a growing necessity to develop environmentally friendly nanoparticle synthesis methods .In this study, we have investigated synthesis of magnetic iron nanoparticles using Sargassum ilicifolium alcoholic extract. The synthesis and characterization of magnetic iron nanoparticles were ...
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Recently, there is a growing necessity to develop environmentally friendly nanoparticle synthesis methods .In this study, we have investigated synthesis of magnetic iron nanoparticles using Sargassum ilicifolium alcoholic extract. The synthesis and characterization of magnetic iron nanoparticles were obtained via UV-Vis spectrum , X-ray diffraction(XRD), transmission electron microscopy(TEM) and vibrating sample magnetometry(VSM) respectively. Formation of iron nanoparticle was attended whit change color from green to green brownish. The maximum peak absorption of synthesized iron nanoparticles was observed at 428 nm indicating the reduction of iron ions and formation of iron nanoparticles. According to the acquired analyses, shape of nanoparticles was spherical and face centered cubic(FCC) and the crystal size was 26.73 nm. Moreover, as prepared iron nanoparticles were demonstrated superparamagnetic and soft magnetic properties.
علوم غیرزیستی دریا
Hadis Koopi; Foad Buazar
Abstract
Nanoparticle biosynthesis is considered an important part of nanotechnology which is economically viable; it is an environmentally-friendly procedure with great advantages compared to physical and chemical ones. In the present study, a green approach is presented for the first time for producing alpha ...
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Nanoparticle biosynthesis is considered an important part of nanotechnology which is economically viable; it is an environmentally-friendly procedure with great advantages compared to physical and chemical ones. In the present study, a green approach is presented for the first time for producing alpha aluminum oxide nanoparticles using Sargassum ilicifolium algae in which its methanolic algae extract was employed as a reducing agent and stabilizer layer. Under optimal conditions of 25ºC and pH=4, 10% of algae extract concentration and 0.05M Al2(SO4)3 salt, aluminum cations were reduced completely to nanoscale phase within 24 hours. Nanoparticle formation was confirmed through UV-Vis technique at wavelength of 225nm. XRD technique confirms the formation of alpha aluminum oxide size 35 nanometers in a hexagon shape. The results of TEM confirms the spherical almost shape of the produced nanoparticle, the results of SEM shows the average size 33.40 of the nanoparticle, and the results of EDX indicated the purity of the produced nanoparticle which is formed of only oxygen and aluminum atoms.