1. Bernal Institute, Department of Chemical Sciences, University of Limerick, Castletroy, Limerick V94, Ireland
2. Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Gambang 26300, Kuantan, Malaysia
3. Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, Gambang 26300, Kuantan, Malaysia
4. Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia