Polymer Hollow Particles with a Size-Tunable Hole in Their Surfaces and Their Application
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When the dimpled hollow polystyrene (PS) seeds were dispersed in a mixed solution of water and toluene, followed by the solvent evaporation, hollow PS particles with an open hole in the surface were obtained. The size of the hole could be controlled by introducing additional alcohol into the water-toluene mixture during the reaction. By reducing the metal precursor on the surface of the polymer particles, pored hollow PS particles embedded with silver nanocrystals were obtained. When used as catalytic reactors for reducing 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) using sodium borohydride (NaBH4), the PS/Ag nanocrystals hybrid particles exhibit excellent catalytic activity.