1. CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, PR China
2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, PR China
3. Experimental Center, Shanxi University of Finance and Economics, Taiyuan 030006, PR China
4. Technology Innovation Center of Hebei Province for Heterocyclic Compound, College of Chemical Engineering, Shijiazhuang University, Shijiazhuang 050035, PR China
5. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, PR China