1. Chemistry and Chemical Engineering College, Yibin University, Yibin 644007, P. R. China
2. School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408000, P. R. China
3. School of Transportation and Logistics, Southwest Jiaotong University, Chengdu 611756, P. R. China
4. School of Metallurgic Engineering, Anhui University of Technology, Maanshan 243002, P. R. China