1. College of Chemical Engineering, Changchun University of Technology, Changchun 130012, P. R. China
2. School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, P. R. China
3. College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
4. Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun 130012, P. R. China