1. Henan Key Laboratory of Rare Earth Functional Materials, International Joint Research Laboratory for Biomedical Nanomaterials of Henan, Zhoukou Normal University, Zhoukou 466001, P. R. China
2. College of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466001, P. R. China
3. College of Chemistry and Chemical Engineering, Zhoukou Normal University, Zhoukou 466001, P. R. China
4. Library, Zhoukou Normal University, Zhoukou 466001, P. R. China
5. Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China