1. Department of Chemical and Environmental Engineering, Universiti Putra Malaysia − UPM, 43400 Serdang, Selangor, Malaysia
2. Catalysis Science and Technology Research Centre (PutraCat), Faculty of Science, Universiti Putra Malaysia − UPM, 43400 Serdang, Selangor, Malaysia
3. Institute of Advanced Technology, Universiti Putra Malaysia − UPM, 43400 Serdang, Selangor, Malaysia
4. Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia − UKM, 43600 Bangi, Selangor Darul Ehsan, Malaysia
5. Vice Chancellor Office, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia