1. Department of Chemistry, Faculty of Natural and Applied Sciences, Nile University of Nigeria, Plot 681, Cadastral Zone C-OO, Research & Institution Area, 900001 FCT Abuja, Nigeria
2. Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, P.O. Box 17011, 2028 Doornfontein, South Africa
3. Department of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
4. International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, 173212 Solan, Himachal Pradesh, India