Binderless hierarchically porous 4A-zeolite has been successful produced through hydrothermal crystallization, in which silicon-aluminum sol binded Covers to the carbon nanofibers (CNFs), that is to say, where the CNFs powder was coated during the crystallization 4A-zeolite.The mixing of silica-alumina sol and CNFs was only a simple physical mixing process.The samples of micropores-macroporous hierarchical 4A-zeolite (P-4A-zeolite) was analyzed by a series of characterization techniques, such as field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), simultaneous thermal analysis (STA) and CO2 adsorption-desorption (BET and BJH), and so on.
In addition, the adsorption test of silver nanoparticles was carried out.The characterization results indicated the presence of micropores and the formation of Roasting Tin macroporous.At the same time, silver adsorption test proved that the prepared P-4A-zeolite had good adsorption performance and the catalytic performance of Ag/P-4A-zeolite was further investigated through the epoxidation of styrene.
Keywords: Carbon nanofibers, Porous 4A-zeolite, Silver nanoparticles, Styrene epoxidation.