| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
2D Materials – Preparation, Properties & Applications
|
| Presentation Title |
Controlled Synthesis of Reduced Graphene Oxide-carbon Nanotube Hybrids and Their Applications in The Fabrication of Membranes for Water Purification |
| Author(s) |
Samar Azizighannad, Oindrila Gupta, Somenath Mitra |
| On-Site Speaker (Planned) |
Somenath Mitra |
| Abstract Scope |
This paper reports the controlled synthesis of reduced graphene oxide-carbon nanotube (rGO-CNT) hybrids and their properties and application in water purification. Several hybrids with oxygen content ranging from 26 to 2% were synthesized. Solubility, dispersibility, hydrophobicity, critical coagulation concentration (CCC value) and Zeta Potential of the hybrids depended upon the level of reduction. These materials were incorporated into Polytetrafluoroethylene (PTFE) membranes via surface coating to investigate water purification and desalination via Membrane Distillation (MD). Membranes with rGO-CNT exhibited significantly superior performance compared to a PTFE membrane and represented an enhancement of 101% in flux, 181.78% in selectivity, and 225% in mass transfer coefficient when applied to the recovery of tetrahydrofuran from water. Improved performance was due to the preferential sorption of the organic solvent on rGO−CNTs, the nano capillary effect through graphene sheets, along with the activated diffusion of the aqueous organic solvent via a frictionless CNT surface. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nanotechnology, Surface Modification and Coatings, Environmental Effects |