1. Department of Chemistry Khwaja Fareed University of Engineering and Information Technology Rahim Yar Khan 64200 Pakistan
2. College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 Gansu China
3. School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT UK
4. National Graphene Institute University of Manchester Oxford Road Manchester M13 9PL UK
5. Department of Materials University of Manchester Oxford Road Manchester M13 9PL UK
6. Chemical Engineering department Khwaja Fareed University of Engineering and Information Technology Rahim Yar Khan 64200 Pakistan
7. Department of Chemistry University of Bath BA2 7AY Bath UK