1. Department of Chemical Engineering, R&D Center for Membrane Technology, Chung Yuan Christian University, Chung Li, Taiwan, Republic of China
2. Material and Chemical
Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan, Republic of
China
3. Department
of Chemistry, National Taiwan University, Taipei 106,
Taiwan, Republic of China
4. Department of Materials
Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan, Republic of China