About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanocomposite Materials: Innovations in Design, Fabrication, and Applications
|
| Presentation Title |
Programmable Organic–Inorganic Hybrid Fe₂O₃ Nanocomposite Interfaces for Sequential Dye Capture |
| Author(s) |
Simona E. Hunyadi Murph |
| On-Site Speaker (Planned) |
Simona E. Hunyadi Murph |
| Abstract Scope |
This study demonstrates a synthesis-free, adsorption-driven approach to engineering organic–inorganic hybrid interfaces on Fe₂O₃ nanoparticles for sequential contaminant capture. By adsorbing methylene blue (MB) onto commercial Fe₂O₃ at pH 9, we achieved a pronounced reversal in surface charge (from −35 mV to +21 mV), creating a robust MB-conditioned interface. This hybrid interface exhibited strong, ion-specific electrokinetic responses to background electrolytes and enabled enhanced secondary removal of methyl orange (MO), with MB-conditioned Fe₂O₃ removing 23% of MO compared to 10% for bare nanoparticles - a 2.3-fold increase. UV–visible spectroscopy revealed distinct spectral shifts, indicating changes in the chemical environment of adsorbed MO. The Fe₂O₃–MB interface remained structurally stable and magnetically responsive, as confirmed by SEM and EDS analyses. These results establish that adsorption-driven surface conditioning can create adaptive, multifunctional nanomaterial interfaces, offering a practical and tunable strategy for sequential contaminant removal in complex aqueous environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Nanotechnology, Magnetic Materials |