1. State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
2. College of Physics Department, Henan Normal University, Xinxiang 453007, P.R. China
3. College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
4. College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, P. R. China
5. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China