1. Department of Chemical Engineering , Universitas Brawijaya , Jl. Mayjen Haryono 167 , Malang 65145 , Indonesia
2. Research Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung , Jl. Ganesha 10, Bandung 40132 , Indonesia
3. Barrer Centre, Department of Chemical Engineering , Imperial College London, Exhibition Road , London SW7 2AZ , UK
4. Department of Chemical Engineering , Institut Teknologi Bandung , Jl. Ganesha 10, Bandung 40132 , Indonesia