IEC 84 |
| Jackie Y. Ying, Department of Chemical Engineering, Department of Chemical Engineering, Massachusetts Institute of Technology, 25 Ames Street, Room 66-542, Cambridge, MA 02139-4307 |
| Nanostructured materials are of interest for a variety of applications. This talk describes the synthesis and properties of nanocrystalline materials for environmental catalysis. Nanocrystalline materials are made up of crystallites with dimensions of 5-15 nm. They may be generated by various physical and chemical approaches. As ultrahigh surface area materials, they are of great interest in catalytic applications. We have generated titania-based nanocrystalline materials with controlled size, phase, dopants and additives by sol-gel processing and hydrothermal treatment. These materials are optimized for the photocatalytic decomposition of chlorinated compounds. Through reverse microemulsion mediated hydrolysis, we have also achieved complex oxide nanoparticles with ultrahigh thermal stability. The resulting ceria/barium hexaaluminate nanocomposite system provides for excellent methane combustion activity over a wide range of temperatures. These examples illustrate the uniqueness of nanocomposite processing, enabling us to design and tailor microstructure, component dispersion, surface reactivity and electronic structure of catalytic systems with multiple functionalities. |
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Nanotechnology and the Environment
8:30 AM-11:55 AM, Tuesday, March 25, 2003 Convention Center -- Room 392, Oral
Division of Industrial and Engineering Chemistry |