1. Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
2. Beijing Graphene Institute (BGI), Beijing 100095, China
3. State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, China
4. Department of Materials Application Research, AVIC Manufacturing Technology Institute, Beijing 100024, China