1. School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), Skudai, Johor Bahru, Malaysia
2. Advanced Nano Materials (Anoma) Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, Kuala Nerus, Malaysia
3. School of Chemical Sciences, Universiti Sains Malaysia (USM), Minden, Malaysia