1. Department of Pure and Applied Chemistry, Usman Danfodiyo University Sokoto, P.M.B. 2346, Sokoto State, Nigeria
2. Central Advanced Science Laboratory, Usmanu Danfodio University Sokoto, P.M.B. 2346, Sokoto State, Nigeria
3. Department of Chemical Engineering, University of Maiduguri, P.M.B 1069, Off Bama Road, Maiduguri, Borno State, Nigeria