1. Shanghai Engineering Research Center of Hierarchical Nanomaterials and School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
2. Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, P. R. China
3. Research Institute of Petroleum Exploration & Development (RIPED), PetroChina, Key Laboratory of Nano Chemistry (KLNC), CNPC, Beijing 100083, P. R. China