Journal of Fundamentals of Renewable Energy and Applications
Open Access
ISSN: 2090-4541
+44 1300 500008
ISSN: 2090-4541
+44 1300 500008
S A Waly, M M Shehata and H H Mahmoud
Nuclear Research Centre, Egypt
Posters & Accepted Abstracts: J Fundam Renewable Energy App
Polymer film based on poly (vinylpyrrolidone) (PVP) doped with different concentrations of copper nitrate were prepared using solution cast technique and the polymer films were subjected to 60Co �³-rayâ��s source at various doses ranging between 100 and 400kGy. The effects of Cu ions concentration and gamma irradiation dose on the chemical and physical properties have been studied. The FT-IR spectra studies for undoped PVP and Cu/PVP films revealed the vibrational changes that occurred due to the effect of dopant copper in the polymer and gamma dose. The XRD results revealed that the amorphous domains of PVP polymer matrix increased in size with the increase of the doping concentration. The variation in film morphology was examined by scanning electron microscopy. Photoluminescence spectra were recorded for Cu/PVP films under the excitation wavelength of 750 nm and showed a decrease in luminescence intensity with increasing of the irradiation dose. The electrical conductivity increased with increasing of Cu dopant concentration and �³-irradiation dose. TGA and DTA studies reveal that changes in the thermal stability. Optical absorption studies were made in the wavelength range 200-800 nm. The absorption edge, direct and indirect band gap values were evaluated and the effect of gamma radiation on its value was determined. The direct band gap decreases from 3.4 to 3.09 eV and from 3.10 to 2.84eV for indirect band gap when the irradiation dose increases from 100kGy to 400kGy respectively.
Email: shf_waly@yahoo.com