GREEN SYNTHESIS OF SILVER NANOPARTICLES USING PSIDUMGUAJAVALEAF EXTRACT | ||||
| Journal of Environmental Science | ||||
| Article 1, Volume 46, Issue 1, June 2019, Page 1-19 PDF (547.04 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jes.2019.67964 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| ,H. Ali Rehab1; ,M. H. Khalil Mostafa2; , H. Ismail Eman2; ,E. Mohamed Heba2 | ||||
| 1Institute of Environmental Studies and Research, Ain Shams University | ||||
| 2Faculty of Science, Ain Shams University | ||||
| Abstract | ||||
| In this paper, the green synthesis of silver nanoparticles (AgNPs) using Psidium guajava leaf extract at room temperature. The prepared silver nanoparticles were characterized using UV-Vsible Spectroscopy, Transmission Electron Microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and Thermal gravimetric analysis (TGA). The effects of extract concentration, extract pH and contact time on the size and shape of silver nanoparticles are studied. The data revealed that the rate of formation of nanosilver increased significantly in the basic medium and with increasing temperature. TEM studies showed that the particles to be of various shapes and sizes. X-ray diffraction (XRD) study confirmed crystalline nature of the synthesized nanoparticles. FTIR measurement showed that the silver nanoparticles having a coating of the extract compounds indicating a possible role of groups of phenolic compounds that act as a capping and stabilizing agents for the formed silver nanoparticles. Thermo gravimetric analysis (TGA) was carried out to determine the amount of capping phytochemicals on the silver nanoparticles. Supposed mechanism for the formation of silver nanoparticles is discussed. Keywords: Green synthesis, Psidium guajava, leaf extract, Ag NPs. | ||||
| Keywords | ||||
| Green synthesis; Psidium guajava; leaf extract; Ag NPs | ||||
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