| About this Abstract |
| Meeting |
Materials Science & Technology 2012
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Shape-Controlled Synthesis and Reactivity-Shape Correlation Study in CeO2 Nanocrytals |
| Author(s) |
Ruigang Wang, Samuel Mutinda |
| On-Site Speaker (Planned) |
Ruigang Wang |
| Abstract Scope |
Experiments and calculations have underscored the importance of surface facet orientation on oxygen vacancy formation in ceria, which is directly related to its oxygen storage capacity (OSC) and catalytic activity. We report a facile hydrothermal synthesis for shape/size-controlled ceria (CeO2) nanocrystals. CeO2 nanocrystals in the shape of nanorods, nanotubes, or nanocubes with reactive {110}, {200}, {211} faces can be produced using hydrothermal method. We found that hydrothermal reaction temperature is a critical parameter to control the shape and size of ceria nanocrystals. High resolution transmission electron microscopy studies revealed that the CeO2 nanocubes/nanocuboids expose predominant {200} crystal planes. Hydrogen temperature programmed reduction (H2-TPR) and thermogravimetric analysis (TGA) in reducing atmosphere were used to characterization the H2 consumption and redox properties of materials. We will present the results for a shape-reactivity correlation study in ceria. |
| Proceedings Inclusion? |
Undecided |