LI Qiao1, YAN Chun-Geng2, WANG Li-Min1, ZHANG Hui-Ying3, ZHOU Qing1*
1. College of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China;
2. Xi'an Middle School, Xi'an 710018, China;
3. School of Chemistry and Environmental Engineering, Han Shan Normal University, Chaozhou 521041, China