1. Long-range selective transport of anions and cations in graphene oxide membranes, causing selective crystallization on the macroscale
- Author
-
Andrea Liscio, Alessandro Kovtun, Vanesa Quintano, Fabiola Liscio, Fabio Biscarini, and Vincenzo Palermo
- Subjects
Materials science ,Oxide ,Salt (chemistry) ,Bioengineering ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Ion ,law.invention ,chemistry.chemical_compound ,law ,General Materials Science ,Crystallization ,Ion transporter ,chemistry.chemical_classification ,Range (particle radiation) ,Graphene ,General Engineering ,General Chemistry ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Membrane ,chemistry ,Chemical engineering ,graphene oxide ,0210 nano-technology - Abstract
Monoatomic nanosheets can form 2-dimensional channels with tunable chemical properties, for ion storage and filtering applications. Here, we demonstrate transport of K+, Na+, and Li+ cations and F- and Cl- anions on the centimeter scale in graphene oxide membranes (GOMs), triggered by an electric bias. Besides ion transport, the GOM channels foster also the aggregation of the selected ions in salt crystals, whose composition is not the same as that of the pristine salt present in solution, highlighting the difference between the chemical environment in the 2D channels and in bulk solutions.
- Published
- 2021