| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances and Discoveries in Non-equilibrium Driven Nanomaterials and Thin Films
|
| Presentation Title |
Aggregation Dynamics in Nanoceria Under Polymerization of Ce Ions |
| Author(s) |
Sudipta Seal, Yifei Fu, Craig James Neal, Elayaraja Kolanthai, Joanna Wojewoda-Budka, Natalia Sobczak, Lidia Litynska-Dobrzynska, Ishaan Patel |
| On-Site Speaker (Planned) |
Sudipta Seal |
| Abstract Scope |
This presentation will explore the synthesis of ceria nanoparticle (CeNPs) via hydrolysis of tetravalent cerium, specifically through the spontaneous reaction of ceric ammonium nitrate (CAN). Benefiting from the Lewis acid character of CAN, hydroxide levels from water self-dissociation are sufficient for the hydrolysis reaction of Ce(IV) to occur to a significant extent in a highly acidic environment (pH < 3), leading to the initial nucleation and subsequent formation of CeNPs. The results of the combined analysis of DLS, HRTEM, XPS, and UV-Vis indicate that CeNPs formation is a kinetic process, and the obtained particle size and extent of aggregation varied with the aging conditions. A tentative explanation is provided that the CAN aqueous solution can be considered a metastable system where a complete equilibrium between the continuous polymerization of Ce(IV) and particle aggregation can take days to reach. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nanotechnology, Ceramics, Powder Materials |