| 초록 |
An easy-to-use method was developed for producing hollow PS microparticles with an open hole in the surface. During the swelling and evaporation processes, hollow and dimpled PS seeds were found to transform into hollow spherical microparticles with an open hole in the surface. The resulting PS microparticles were quite uniform in terms of particle size and shape, and the size of the hole on the surface can be tuned to some extent by varying the reaction conditions. By using the hollow and pored PS microparticles, Ag nanocrystals/PS hybrid microparticles were prepared by carrying out an in situ reduction of Ag precursor directly on the surface of PS microparticles. When the hybrid particles were used as catalyst for the reduction of 4-NP by NaBH4, they showed excellent catalytic activity at low catalyst concentration and reusability. |
