Kinetic and Thermodynamic Studies of Biosynthesis of Silver Oxide Nanoparticles


  • 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.



bio synthesis, silver oxide nanoparticals


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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How to Cite

A. M. Rasheed and H. H. Al-Shammary, “Kinetic and Thermodynamic Studies of Biosynthesis of Silver Oxide Nanoparticles”, Al-Mustansiriyah Journal of Science, vol. 31, no. 3, pp. 21–27, Aug. 2020, doi: 10.23851/mjs.v31i3.732.

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