1. Key Laboratory of Cluster Science, Ministry of Education, Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
2. State Key Laboratory of Rare Earth Resource Ultlization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, 130022, P. R. China
3. School of Engineering, China University of Petroleum-Beijing at Karamay, Karamay, Xinjiang, 834000, P. R. China