1. College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang 443002 P. R. China
2. Division of Chemistry and Biological Chemistry School of Chemistry, Chemical Engineering and Biotechnology Nanyang Technological University 21 Nanyang Link 637371 Singapore
3. Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of Education China Three Gorges University Yichang 443002 P. R. China
4. School of Science RMIT University Melbourne VIC 3000 Australia