1. Department of Chemistry, Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China.
2. Department of Metallurgical Engineering, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, China.
3. Lanzhou Fire and Rescue Division, Gansu Fire and Rescue Brigade, Lanzhou, China.