1. Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Hwarangro 14 gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
2. State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, P. R. China
3. Department of Materials Science, Fudan University, Shanghai 200433, P. R. China