1. Shangqiu Medical College, Shangqiu 476000, P. R. China
2. Shangqiu Secondary Professional School, Shangqiu 476000, P. R. China
3. School of Chemistry & Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, P. R. China
4. Engineering Research Center for Optoelectronic Functional Materials of Henan Province, Shangqiu Normal University, Shangqiu 476000, P. R. China