1. Nanocomposite Catalysts Lab. Chemistry Department Faculty of Science at Qena South Valley University Qena 83523 Egypt
2. School of Chemistry and Chemical Engineering Queen's University Belfast (@QUBelfast) David Keir Building Belfast BT9 5AG Northern Ireland (UK
3. State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 P. R. China