A reduced graphene oxide (rGO) membrane was reported for efficient and rapid screening of radioactive strontium ions by Ningbo University. The chemical functional groups of rGO membrane were measured and analyzed by SR-FTIR technology from Shanghai Light Source BL06B endstation. Compared with the GO, the spectrum of rGO reduced by the amino-hydrothermal method exhibited a clear decrease in peak strength of hydroxyl, carbonyl, and epoxy groups, indicating successful reduction of GO. While the C–N compositions indicated the presence of C-N bonds on the reduced GO surface by the ammonia reduction process. This research work demonstrates a rapid and efficient separation of radioactive 90Sr from other radioactive ions by a rGO membrane, which prepared by the amino-hydrothermal method from GO suspensions. The separation factors are about one or two orders of magnitude higher than the highest reported separation factors for membranes sieving divalent ions. These findings offer a simple avenue for the precise treatment of radioactive liquid waste, which is vital for the advancement of nuclear energy technology. (Journal of Membrane Science, 2024, 689, 122181)
Fig. SR-FTIR spectra of GO and rGO.
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