Understanding the role of graphene oxide dispersion on tuning membrane properties for water nanofiltration
Graphene-based membranes have shown great potential for water filtration due to the unique and tunable laminar structure of graphene materials. In this study, the properties of graphene oxide (GO) membranes were tuned in a simple and scalable manner by adjusting the formation conditions, particularl...
| Authors: | ; ; ; ; ; |
|---|---|
| Format: | Article |
| Publication date: | 2025 |
| Country: | España |
| Institution: | Universidad Autónoma de Madrid |
| Repository: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Language: | English |
| OAI Identifier: | oai:repositorio.uam.es:10486/718098 |
| Online Access: | http://hdl.handle.net/10486/718098 https://dx.doi.org/10.1016/j.eti.2025.104017 |
| Access Level: | Open access |
| Keyword: | Graphene oxide membrane filtration PFOS water treatment Química |
| Summary: | Graphene-based membranes have shown great potential for water filtration due to the unique and tunable laminar structure of graphene materials. In this study, the properties of graphene oxide (GO) membranes were tuned in a simple and scalable manner by adjusting the formation conditions, particularly the GO load (200–600 mg m−2) and the GO dispersion concentration (2.5–40 mg L−1). The GO membranes were tested in a crossflow filtration system with aqueous solutions of heptadecafluorooctanesulfonic acid (PFOS), phenol, and NaNO3, demonstrating their potential in nanofiltration. The membranes fabricated with the highest GO load and the lowest GO concentration showed an improved rejection rate for all tested compounds, achieving 99 % rejection for PFOS. These membranes exhibited higher compaction and ordering of the GO sheets in the inner part of the membranes, which was found to have a higher impact on rejection and permeance than average interlayer spacing, even though compaction affected only a few nanometers |
|---|