1. School of Chemical and Material EngineeringKey Laboratory of Synthetic and Biological ColloidsMinistry of EducationJiangnan University Wuxi 214122 P. R. China
2. Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsCollege of Materials and Chemical EngineeringChina Three Gorges University Yichang Hubei 443002 P. R. China
3. C. Eugene Bennett Department of ChemistryWest Virginia University Morgantown, West Virginia 26506 USA