There are many methods to synthesize metal and metal oxide nanoparticles (NPs) using different reducing agents which are hazardous in nature. Although some researchers have used biobased materials for the synthesis of these NPs, further research is needed in this area. چکیده کامل
There are many methods to synthesize metal and metal oxide nanoparticles (NPs) using different reducing agents which are hazardous in nature. Although some researchers have used biobased materials for the synthesis of these NPs, further research is needed in this area. To explore the scope of bio-extract for the synthesis of transition metal NPs, the present paper synthesizes metal NPs replacing hazardous traditional reducing agents. This paper reports the synthesis zero-valent iron nanoparticles (ZVINs) by a green method and investigates the antibacterial activity of these nanoparticles through the extract of Thymus carmanicus. Green synthesis of Thymus carmanicu-Zero Valent Iron Nanoparticles (TC-ZVINs) was carried out in an alkaline environment. The TC-ZVINs were characterized by the use of imaging FESEM and spectroscopic (FTIR and XRD) methods. The TC-ZVINs obtained were a mixture of spherical and quasi-spherical shapes with diameters ranging between 40 and 80 nm. These methods demonstrated that some polyphenols are bound to the surfaces of the TC-ZVINs as a capping/stabilizing agent. Furthermore, The TC-ZVINs, TC extract and different percentages of them have the potential to terminate the pathogenicity of gram-negative (Escherichia coli) and gram-positive (Staphylococcus aureus) bacteria. This property is slightly higher in the TC-ZVINs than in T. carmanicus extract. For both types of bacteria, the diameter of the inhibitory zone obtained from TC-ZVINs was about 10.8.
پرونده مقاله
Development of green and efficient procedures for the synthesis of metallic nanoparticles has emerged as a significant topic in the field of nanotechnology. In this respect, using natural resources especially plant extract has attracted lots of attention; plant extract چکیده کامل
Development of green and efficient procedures for the synthesis of metallic nanoparticles has emerged as a significant topic in the field of nanotechnology. In this respect, using natural resources especially plant extract has attracted lots of attention; plant extract is a promising alternative to traditional and chemical techniques. The plant Mucuna pruriens L. contains high concentration of L-dopa in the seeds; it has been used as a nerve tonic for nervous system disorders including Parkinson’s disease. In this work, a rapid and efficient synthesis of stable magnesium oxide nanoparticles (MgO NPs) using aqueous extract of Mucuna pruriens seeds were reported. The biologically synthesized MgO NPs were characterized by UV–Visible and Fourier transform infrared (FTIR) spectroscopy as well as X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM). The potential of MgO nanoparticles in the degeneration of methyl orange (MO) and methylene blue (MB) dyes were assessed in different conditions. The results of these investigations showed that the synthesized MgO NPs have a good catalytic activity in the removal of both dyes. Biological study of biosynthesized MgO NPs showed moderate antibacterial property against four strains of bacteria and a very good antioxidant activity.
پرونده مقاله
Development of green and efficient procedures for the synthesis of metallic nanoparticleshas emerged as a significant topic in the field of nanotechnology. In this respect, using naturalresources,especially plant extract has attracted lots of attention; plant extract is چکیده کامل
Development of green and efficient procedures for the synthesis of metallic nanoparticleshas emerged as a significant topic in the field of nanotechnology. In this respect, using naturalresources,especially plant extract has attracted lots of attention; plant extract is a promisingalternative to traditional and chemical techniques. The plant Mucuna pruriens L. contains highconcentration of L-dopa in the seeds; it has been used as a nerve tonic for nervous systemdisorders including Parkinson’s disease. In this work, a rapid and efficient synthesis of stablemagnesium oxide nanoparticles (MgO NPs) using aqueous extract of Mucuna pruriens seedswere reported. The biologically synthesized MgO NPs were characterized by UV–Visible andFourier transform infrared (FTIR) spectroscopy as well as X-ray diffraction (XRD), scanning andtransmission electron microscopy (SEM and TEM). The potential of MgO nanoparticles in thedegeneration of methyl orange (MO) and methylene blue (MB) dyes were assessed in differentconditions. The results of these investigations showed that the synthesized MgO NPs havea good catalytic activity in the removal of both dyes. Biological study of biosynthesized MgONPs showed moderate antibacterial property against four strains of bacteria and a very goodantioxidant activity.
پرونده مقاله
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