REN Jian-Lin1**, LI Bing1, LIU Xiang-Yu1, CAO Bao-Yue2, KE Zeng-Bo2**, GAO Sheng-Li3**
1. College of Chemistry and Chemical Engineering,Ningxia University/National Key Laboratory of Coal Efficient Utilization and Green Chemical Technology,Yinchuan 750021,China; 2. College of Chemical Engineering and Modern Materials, Shangluo University/Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo 726000,China; 3. College of Chemistry and Materials Science,Northwest University,Xi'an 710127,China