1. Catalysis Science and Technology Research Centre (PutraCAT), Chemistry Department, Faculty of Science Universiti Putra Malaysia Serdang Malaysia
2. Department of Chemistry, Faculty of Science Federal University Dutse Dutse Nigeria
3. Department of Basic Science and Engineering, Faculty Agriculture and Food Sciences Universiti Putra Malaysia Bintulu Sarawak Campus Bintulu Malaysia
4. Centre of Catalysis Research Laboratory, School of Chemical Science and Food Technology, Faculty of Science and Technology Universiti Kebangsaan Malaysia Bangi Malaysia
5. Faculty of Science and Natural Resources Universiti Malaysia Sabah Kota Kinabalu Malaysia