1. Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, P. R. China
2. Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, P. R. China
3. School of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, P. R. China