1. Institute of NanoEngineering Research (Iner) and Department of Chemical, Metallurgical and Materials Engineering, Faculty of Engineering and the Built Environment, Tshwane University of Technology, Pretoria, South Africa
2. Faculty of Engineering, Department of Polymer Engineering, Nnamdi Azikiwe University, Awka, Nigeria
3. Dst-csir National Center for Nanostructured Industrial Research, Pretoria, South Africa
4. Department of Applied Chemistry, University of Johannesburg, Doornfontein, Johannesburg, South Africa
5. Faculty of Engineering, Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Nigeria