1. College of Materials, Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, P. R. China
2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu, Sichuan, P. R. China
3. College of Environment and Ecology, Chengdu University of Technology, Chengdu, Sichuan, P. R. China
4. Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, P. R. China