1. Polymers and Composites, Materials Science and Manufacturing Unit; Council for Scientific and Industrial Research (CSIR); Port Elizabeth South Africa
2. Department of Chemistry, Faculty of Science; Nelson Mandela University; Port Elizabeth South Africa
3. Bioenergy and Bioremediation Laboratory, Department of Microbiology; Alagappa University; Tamil Nadu India
4. Department of Energy Science; Alagappa University; Tamil Nadu India
5. Department of Chemistry, Faculty of Science; Durban University of Technology; Durban South Africa