1. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, PR China
2. Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao 066004, PR China
3. College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, PR China
4. State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum, Beijing 102249, PR China