QIAO Cheng-Fang1**, XIA Zheng-Qiang2**, QIAO Jia-Le1, CUI Xiao-Wei1, CAO Bao-Yue1, ZHOU Chun-Sheng1, YANG Qi2, GAO Sheng-Li1,2
1. Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, College of Chemical Engineering andModern Materials, Shangluo University, Shangluo 726000, China;
2. College of Chemistry & Materials Science,Northwest University, Xi'an 710079, China