1. Department of Chemical Engineering, Henan Polytechnic Institute, Nanyang, Henan 473009, P.R. China
2. Department of Mechanical Engineering, Henan Polytechnic Institute, Nanyang, Henan 473009, P.R. China
3. The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China