1. State
Key Laboratory of Applied Organic Chemistry, Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
2. Department
of Chemistry, Gansu Lianhe University, Lanzhou 730000, China
3. Center
of Xuyi Attapulgite Applied Technology,, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China