1. aHunan Engineering Technology Research Center for Comprehensive Development and Utilization of Biomass Resources, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou, Hunan, 425199, China
2. bBeijing University of Chemical Technology, Beijing, China
3. cLab. für Anorganische Chemie, ETH Zürich, HCI H 131, Vladimir-Prelog-Weg 1-5/10, 8093 Zürich, Switzerland
4. dAdvanced Fibers, Empa Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, 9014, St. Gallen, Switzerland
5. eNational Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
6. fCollege of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing, 100048, China