1. Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, P. R. China
2. College of Materials Science and Engineering/National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, P. R. China
3. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
4. Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States