1. School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
2. U.S.−Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Sciences and Technology (NUST), H-12 Campus, Islamabad 44000, Pakistan
3. School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan