1. College of Chemistry Fuzhou University Fuzhou Fujian 350106 P. R. China
2. CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P. R. China
3. Xiamen Institute of Rare-earth Materials Haixi Institutes Chinese Academy of Sciences Xiamen Fujian 361021 P. R. China
4. Institute of Urban Environment Chinese Academy of Sciences Xiamen Fujian 361021 P. R. China
5. University of Chinese Academy of Sciences P. R. China