Kinetic and Thermodynamic Studies of Biosynthesis of Silver Oxide Nanoparticles

Aminah Muwafaq Rasheed; Hamdia Hatem Al-Shammary

doi:10.23851/mjs.v31i3.732

Authors

Aminah Muwafaq Rasheed Department of Chemistry, College of Science for Women, University of Baghdad.
Hamdia Hatem Al-Shammary Department of Chemistry, College of Science for Women, University of Baghdad.

DOI:

https://doi.org/10.23851/mjs.v31i3.732

Keywords:

bio synthesis, silver oxide nanoparticals

Abstract

The present study was carried out by the formation of silver oxide nanoparticles (Ag₂O NPs) using a plant extract from the seeds of Coriandrum sativum for the biosynthesis of Ag₂O NPs from silver nitrate solution. Data was characterized using furrier transform infrared radiation FTIR, X-ray diffraction XRD, atomic force microscopy (AFM), and scanning electron microscopy (SEM). Results indicated a successful creation of nanoparticles of Ag₂O. FTIR spectra showed a band around (501.49 cm^-1), corresponding to the double bond of oxygen of Ag₂O and XRD pattern identified the appearance of Ag₂O nanoparticles, where six strong peaks were observed at 2θ (32,38, 46, 56,65and 75^°) related to Ag₂O compared with the reference [11], and that indicated to the formation of these particles. Images of AFM showed Ag₂O NPs with an average diameter of (57.31 nm) and SEM indicated a distribution of cubic shape of Ag₂O NPs. In addition, the order of reaction was pseudo-first-order. The value of activation energy, enthalpy, the change in entropy and Gipps free energy has calculated. The value of activation energy was (+1.37j\ mol), the value of enthalpy (-1.371 j\mol), the negative value of enthalpy was heat emission. The value of entropy was (+56.53 j\mol) and the value of Gipps free energy was (-3.957 J\mol). In this study, silver oxide nanoparticles were prepared by the bio-synthesis method. The diameter of this particles was (57.31) nm. The kinetics and thermodynamic of this reaction were studied and proved by a chemical equation.

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