1. School of Materials Science and Engineering, Lanzhou University of Technology, 287 Langongping Road, Lanzhou 730050, China
2. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, 287 Langongping Road, Lanzhou 730050, China
3. College of Science, Hebei Agricultural University, Baoding 071001, China
4. State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, NingXia, China