1. Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu, 730070, P. R. China
2. Experimental & Training Teaching Centers, Gansu University of Chinese Medicine Lanzhou, Gansu, 730000, P. R. China
3. Gansu Natural Energy Research Institute, Lanzhou, 730046, P. R. China