1. College of Chemistry and Chemical Engineering School of Materials Science and Engineering China University of Petroleum (East China) Qingdao 266580 P. R. China) E-mail: address
2. College of New Energy China University of Petroleum (East China) Qingdao Shandong 266580 P. R. China
3. College of Chemistry and Chemical Engineering Mudanjiang Normal University Mudanjiang 157011 P. R. China