1. Federal University of Technology Owerri Africa Center of Excellence in Future Energies and Electrochemical Systems, , Owerri, IM 1526 , Nigeria
2. Federal University of Technology Owerri Department of Mechanical Engineering, , Owerri, IM 460114 , Nigeria
3. Federal University of Technology Owerri Department of Physics, , Owerri, IM 1526 , Nigeria