1. State Key Laboratory of Coal Conversion, Analytical Instrumentation Center, Institute of Coal Chemistry, Chinese Academy of Science, Taiyuan 030001, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Institute of Crystalline Materials, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
4. Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China