1. Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Waste, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, P. R. China
2. School of Materials Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Engineering, Peking University, Beijing 100871, P. R. China
3. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China