1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, Gansu, P. R. China
2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, P. R. China
3. School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, Jiangxi, P. R. China
4. Gansu Yinguang Juyin Chemical Co., Ltd., Baiyin 730900, Gansu, P.R. China