| 초록 |
This study introduces the fabrication of a magnetic polystyrene bowl for enhanced catalytic activity and recyclability, which involves the synthesis of silica-coated Fe3O4 magnetic clusters, seeded dispersion polymerization using the silica-coated magnetic clusters, and transformation into a bowl structure which was induced by phase separation. The additional treatment with tannic acid coating on the bowls allows the formation of silver nanoparticles on bowl particle's surfaces. The openness and larger surface area of the bowls, as compared with those of other structured particles, such as sphere and flower enable a highly immobilization of AgNPs, thus leading to an excellent catalytic reduction for 4-nitrophenol, methylene blue, and rhodamine B. Also the strong magnetic response originating from the magnetic clusters inside the bowls endows a good magnetic recovery and an excellent reusability for the repeated reduction of the organic dyes without loss of catalytic activity. |
