1. College of Chemistry and Pharmaceutical Engineering
2. Nanyang Normal University
3. Nanyang 473061
4. China
5. College of Continuing Education
6. P.R. China
7. State Key Laboratory for Mechanical Behavior of Materials and MOE Key Laboratory for Non-equilibrium; Synthesis and Modulation of Condensed Matter and Department of Applied Chemistry
8. School of Science
9. Xi'an Jiaotong University
10. Xi'an 710049