1. School of Chemical Engineering and Pharmaceutics , Henan University of Science and Technology , Luoyang , Henan 471003, P. R. China
2. School of Chemical Engineering and Pharmaceutics , Henan University of Science and Technology, Luoyang Hekeda Recycling Energy Co. LTD , Luoyang , Henan 471003, P. R. China
3. Institute of Chemistry , Chinese Academy of Sciences , Zhongguancun , Beijing 100190, P. R. China