1. Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials
2. College of Chemistry and Chemical Engineering
3. Northwest Normal University
4. Lanzhou 730070
5. P. R. China
6. State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals
7. School of Materials Science & Engineering
8. Lanzhou University of Technology
9. Lanzhou 730050