1. School of Chemical Engineering; University of Science and Technology Liaoning; 185 Qianshan Zhong Road Anshan, Liaoning 114051 P.R. China
2. Department of Chemistry; Okayama University; 3-1-1Tsushima Naka Okayama 700-8530 Japan
3. Department of Material Science; Kanagawa University; Tsuchiya, Hiratsuka, Kanagawa 259-1205 Japan