1. State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University,Yinchuan 750021, China
2. College of Chemistry & Chemical Engineering, Xi’an ShiYou University, Xi’an 710065, China
3. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710069, China