1Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang, PR China
2Department of Pure and Applied Chemistry, University of Calabar, Cross River State, Nigeria
3CAS Key Laboratory for Nanosystem and Hierarchical Fabrication, CAS Centre For Excellence in Nanoscience, National Centre for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, PR China
4Kunming Institute of Botany, University of Chinese Academy of Sciences, Kunming, PR China
5Department of Botany, University of Lagos, Lagos, Nigeria
6Department of Chemistry, Modibbo Adama University of Technology, Yola, Adamawa State, Nigeria