1. College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, PR China
2. College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, PR China
3. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, China
4. School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, Shaanxi, PR China