1. College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
2. School of Elementary Education, Hunan First Normal University, Changsha 410205, China
3. Institute of Natural Products Processing and Utilization, Central South University of Forestry and Technology, Changsha 410004, China
4. National & Local Joint Engineering Laboratory for New Petro-Chemical Materials and Fine Utilization of Resources, Hunan Normal University, Changsha 410081, China
5. Xining Center of Natural Resources Comprehensive Survey, CGS (China Geological Survey), Xining 810008, China