Controlled synthesis of graphene oxide by electrochemical exfoliation for advanced nanofiltration membranes
Graphene oxide (GO) has emerged as a material of great interest for the formation of filtration membranes. Accurate tuning of its properties, such as sheet size and degree of oxidation, can improve its performance in pharmaceutical nanofiltration. The electrochemical synthesis of GO is a method that...
| Autores: | , , , , , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2026 |
| País: | España |
| Recursos: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:dnet:biblosearchi::907b62a0a1dd0c3180c38c8908998684 |
| Acesso em linha: | https://hdl.handle.net/10486/768440 https://dx.doi.org/10.1016/j.jece.2026.122988 |
| Access Level: | acceso abierto |
| Palavra-chave: | Graphene oxide Anodic exfoliation Sheet size Oxidation degree Membranes Nanofiltration Química |
| Resumo: | Graphene oxide (GO) has emerged as a material of great interest for the formation of filtration membranes. Accurate tuning of its properties, such as sheet size and degree of oxidation, can improve its performance in pharmaceutical nanofiltration. The electrochemical synthesis of GO is a method that allows better control of its properties, among other advantages over traditional chemical synthesis. In this work, GO was prepared with two electrochemical methodologies that lead to materials with different oxidation degrees (C/O ratio of 2.7 and 4.0) and distribution of functional groups, with one being rich in hydroxyl and epoxide groups (96.8%) and the other in carbonyl and carboxyl groups (30.5%). In addition, GO with different sheet sizes (ca. 100 and 1000 nm) were obtained. GOs were used in the formation of membranes for the filtration of an antibiotic, whose rejection showed a strong dependence on the degree of oxidation of the GO membrane, rather than sheet sizes. Membranes prepared with 800 mg m 2 of GO with a C/O of 2.7 and small sheet size achieved high pharmaceutical retention (90%), improving upon membranes prepared with a commercial GO derived from standard chemical oxidation of graphite |
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