1. School of Materials Science and Engineering, State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, P. R. China
2. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150000, P. R. China
3. School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, P. R. China