1. Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710062, China
2. Modern Chemical Technology Department, Shaanxi Coal and Chemical Technology Institute Co. Ltd., No. 166 Shenzhou 7th Road, Xi’an, Shaanxi 710100, China