1. State Key Laboratory of Photocatalysis on Energy and Environment; College of Chemistry; Fuzhou University; Fuzhou 350116 P.R. China
2. Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics; Institute of Physics; Chinese Academy of Science; No. 8, 3rd South Street, Zhongguancun, Haidian District Beijing 100190 P.R. China