1. School of Chemical Engineering and Technology
2. Hebei University of Technology
3. Tianjin 300130
4. P. R. China
5. Department of Chemistry
6. Beijing Institute of Pharmaceutical Chemistry
7. Beijing 102205
8. China
9. University of Texas at San Antonio
10. San Antonio
11. USA
12. College of Chemical Engineering
13. Zhejiang University of Technology
14. Hangzhou
15. P.R. China
16. National Center for Nanoscience and Technology
17. Chinese Academy of Sciences
18. Beijing 100190