1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
2. School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
3. College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
4. College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
5. Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Taiyuan 030024, P. R. China