Preparation of Photocatalytic Silicon Core-shell Nanoparticles Covered by ZnS Shell in Solid-Gas Reaction

摘要

The method of effective creation of ZnS thin layer on the carrier silicon nanoparticles surface via the reactive synthesis on the interface of solid-gas reactants was presented. The crucial step, which led to significant enlargement of the reaction interface on the surface of carrier nanoparticles, was the vacuum sublimation, controlled so that the sublimate formed into simple lamellae where the free reaction surface was least impaired by the mutual shielding of the particles. The final material is, thanks to its relatively high specific surface area of 154,3 m~2g~(-1) usefull for photocatalytic applications, especially in a dry environment.