1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China
2. State Key Shanxi Joint Laboratory of Coal-based Solid Waste Resource Utilization and Green Development, Taiyuan 030024, Shanxi, P. R. China
3. College of Chemistry, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China