1. Guangdong Engineering & Technology Research Centre of Graphene-like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, P. R. China
2. School of Light Industry and Materials, Guangdong Polytechnic, Foshan 528041, P. R. China
3. Science and Technology Department, Guangzhou University, Guangzhou 510006, P. R. China
4. Guangdong Jianpai New Materials Co., Ltd., Foshan 528500, P. R. China