1. College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China
2. Hunan Key Lab of Mineral Materials and Application, School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
3. Engineering Research Centre of Nano-Geomaterials of Ministry of Education, China University of Geoscience, Wuhan, 430074, China