1. Department
of Chemistry, Faculty of Science, Sohag University, Sohag 82524, Egypt
2. Photocatalysis
and Nanotechnology Research Unit, Institut fuer Technische Chemie, Leibniz Universitaet Hannover, Callinstrasse 3, D-30167 Hannover, Germany
3. Laboratory
for Nanocomposite Materials, Department of Photonics, Faculty of Physics, Saint-Petersburg State University, Ulianovskaia str. 3, Peterhof, Saint-Petersburg, 198504, Russia