Simple Preparation of Porous Polystyrene Microparticles in Ternary Mixtures and Their Application as Catalyst Support
발표자
()
초록
내용
Porous microparticles are of great significance for their potential application due to their high specific surface area and low density, which can be widely used in various fields such as catalyst, chromatography, drug-targeted delivery and release. In this study, an easy-to-use method was developed to produce monodisperse porous microparticles with well-defined porosity. When polystyrene solid microparticles prepared using modified dispersion polymerization were dispersed in an ethanol-water-toluene mixture at room temperature, they transformed into porous PS microparticles as a result of uptake of the continuous phase by the particles. Metal nanocrystals were produced in situ from metal precursors on the surface of porous polymer particles. When the hybrid particles were used as catalysts, they showed excellent catalytic performance and reusability at low catalyst concentration for the reduction of 4-nitrophenol to 4-aminophenol using sodium borohydride as the reducing agent.