1. School of Chemistry and Chemical Engineering, Qinghai Normal University, Xining 810008, China
2. Academy of Plateau Science and Sustainability, People's Government of Qinghai Province & Beijing Normal University, Xining, 810016, China
3. Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China