1. College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, P. R. China
2. College of Physics, Qingdao University, Qingdao 266071, P. R. China
3. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Department of Macromolecular Materials and Engineering, School of Chemical and Chemical Engineering, Heilongjiang University, Harbin 150080, P. R. China
4. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China