| 초록 |
Themagnetic Cs adsorbent having a core–shell structure that comprises a Fe3O4 core, an interlayer of SiO2, and a titanium-ferrocyanide-shell with hierarchical nanostructure were fabricated for the highly efficient magnetic removalof radioactive cesium from water. At first,the magnetic Fe3O4 nanoparticles werecoated with SiO2 and TiO2. Then, the hierarchical titanium-ferrocyanide composed of 2-dimensional TiFC flakes was fabricated on the surface of core-shell MNP@SiO2@TiO2 particles using a TiO2 sacrificial template via a simple reaction with potassium ferrocyanide based on the Kirkendall-typediffusion. The resulting magnetic Cs adsorbent shows much faster Cs adsorption kinetics and higher adsorption capacity than other magnetic Cs adsorbents because of the increased effective surface area of Cs adsorption sites. Therefore, our magnetic Cs adsorbent has excellent potential for the treatment ofvarious 137Cs-contaminated sources. |
