1. Hubei Key Laboratory of Plasma Chemistry and Advanced Materials & Department of Material Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
2. Division of Applied Physics, Faculty of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
3. Key Laboratory of Salt Lake Resources Integrated Utilization of Qinghai, Qinghai Salt Lake Industry Co., Ltd., Golmud 816000, China