Cairo University

MTPR Journal

 

Spectroscopic and thermal properties of PVK/AgNPs nanocomposites prepared by laser ablation

& doi:
F. H. Abd El-kader , N. A. Hakeem , I. S. Elashmawi , A. A. Menazea

Nanocomposites of Poly (n-vinylcarbazole) PVK/Ag nanoparticles were prepared by laser ablation of a silver plate in aqueous solution of chlorobenzene. The influences of laser parameters such as; time of irradiation, source power and wavelength (photon energy) on Spectroscopic, morphological and thermal properties have been investigated using Fourier Transform Infrared Analysis (FT-IR), Scanning Electron Microscopy (SEM) and Thermogravimetric Analysis (TGA), respectively. From IR data there is a complexation between AgNPs and PVK matrix. SEM reveals that the presence of AgNPs leads to changes in the surface morphology. Kinetic thermodynamic parameters such as activation energy, enthalpy, entropy and Gibb’s free energy are evaluated from TG data using Coat’s - Redfern model.