1. Department of Chemistry, University of Gujrat, Hafiz Hayat Campus, Jalalpur Jattan Road, Gujrat 50700, Pakistan
2. Department of Energy System Engineering, Sukkur Institute of Business Administration, Sukkur 65200, Pakistan
3. Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
4. Graphene Research Institute, Sejong University, Seoul, Republic of Korea