1. Department of Materials and Mineral Resources Engineering, National Taipei University of Technology (NTUT), Taipei106, Taiwan
2. Department of Chemistry, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates
3. Center for Catalysis and Separations, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates