1. Nanotechnology and Catalysis Research Center, (NANOCAT) Universiti Malaya, 50603 Kuala Lumpur, Malaysia
2. Department of Petrochemicals, National Research Institute
of Chemical Technology (NARICT), P.M.B. 1052 Zaria, Nigeria
3. Centre for Advanced Materials and Industrial
Chemistry (CAMIC), School of Applied Sciences, RMIT University, Melbourne VIC 3001, Australia