1. School of Chemistry & Chemical Engineering, Shandong University of Technology, Zibo, Shandong 255049, P. R. China
2. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
3. School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255049, P. R. China
4. Shandong Huatai Paper Co. Ltd., Dongying, Shandong 257335, P. R. China