1. Powder Metallurgy Research Institute, Central South University, Changsha, Hunan 410083, China
2. School of Physics and Electronics, Central South University, Changsha, Hunan 410083, China
3. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China