| 초록 |
With increasing interest in lithium-ion batteries, the extraction of metal ions from seawater or spent batteries is becoming important over time. Currently used methods for extracting metal ions such as electrochemical deposition, chemical precipitation, solvent extraction, etc exhibit significant drawbacks requiring high energy, cost, and additional processes. In contrast, membrane separation shows the advantage of low cost and energy for ion separation via controlling the d-spacing, pore size, and surface charge. Herein, we introduce the nanoporous graphene oxide(GO) membranes prepared by hot-pressing for ion separation. GO membrane was prepared by a bar coating method for scalable fabrication, and its pore size, d-spacing were controlled by hot-pressing. To study the effect of hot pressing on the ion separation performance, the GO membrane was treated with different hot-pressing times. Interestingly, the selectivity between monovalent and divalent was different at the single and mixed ion solutions. Therefore, the behavior of monovalent and divalent ions in the GO membranes was confirmed. |
