Berlin 2024 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 20: Poster II
DS 20.31: Poster
Donnerstag, 21. März 2024, 18:00–20:30, Poster D
Preparation and electrochemical characterization of laminar GO/WS2 membranes — •Ann-Sophie Meyer, Yossarian Liebsch, and Marika Schleberger — Universität Duisburg-Essen, Fakultät für Physik, Germany
Ion-selective membranes are needed for various technical applications such as electrodialysis, fuel cells, desalination and biomedical applications. Nowadays, polymer membranes are mainly used for these applications, but the special properties of 2D materials offer the possibility to produce more efficient membranes. In particular, graphene oxide (GO) membranes are attracting a lot of interest from the scientific community.
In this work, stable GO membranes and GO membranes with an additional amount of WS2 were prepared by vacuum filtration and tested for their morphology as well as ionic conductivity. It was found that ionic conductivity can be improved by incorporating WS2 in the GO membranes, however, neither the exact WS2 content nor a uniform distribution in the resulting membrane could yet be obtained.
Thus, the question of how the introduction of WS2 into GO membranes changes their electrochemical properties and, in particular, increases their conductivity, could only be partially answered within our study.
In order to ensure a homogeneous distribution of WS2, possibilities for optimization of the fabrication method will be discussed. Future experiments can then determine the WS2 content for optimal ionic conductivity.
Keywords: Graphene Oxide; WS2; membranes