1. School of Materials Science & EngineeringSichuan University of Science & Engineering Zigong 643000 P. R. China
2. School of Chemical EngineeringSichuan University of Science & Engineering Zigong 643000 P. R. China
3. College of Chemistry & Environmental EngineeringSichuan University of Science & Engineering Zigong 643000 P. R. China
4. School of Chemistry & Chemical EngineeringSichuan University of Arts & Science Dazhou 635000 P. R. China