1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2. Shanxi Institute of Science and Technology, Jincheng 048000, China
3. School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
4. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China