1. Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing 100083 China
2. Institute of Materials Science University of Connecticut Storrs CT 06269 USA
3. School of Science China University of Geosciences Beijing 100083 China
4. Department of Chemical and Biomolecular Engineering University of Connecticut Storrs CT 06269 USA
5. Department of Chemistry University of Connecticut Storrs CT 06269 USA