The core-shell structures of ZSM-5 coated with mesoporous silica were synthesized by means of dodecylamine(DDA) surfactant. The results show that the mesoporous silica shells are coated on ZSM-5 cores and result in ...The core-shell structures of ZSM-5 coated with mesoporous silica were synthesized by means of dodecylamine(DDA) surfactant. The results show that the mesoporous silica shells are coated on ZSM-5 cores and result in the formation of hierarchical porous structures. The thickness of the coating shell can be controlled by changing the adding amount of TEOS. The core-shell composites with the thickness of 35 nm possess high surface areas(about 528 m2·g-1), large pores(about 3.5 nm in diameter) on the silica shells. The composite molecular sieves display higher adsorption capacity for benzene(140.2 mg·g-1) and butyraldehyde(213.7 mg·g-1) than that of pristine ZSM-5 for benzene(99.2 mg·g-1) and butyraldehyde(134.7 mg·g-1). The composite molecular sieves show a wide application foreground for harmful gas adsorbent for environmental protection.展开更多
基金Funded by the China National Tobacco Corporation(110201101027(JH-02))
文摘The core-shell structures of ZSM-5 coated with mesoporous silica were synthesized by means of dodecylamine(DDA) surfactant. The results show that the mesoporous silica shells are coated on ZSM-5 cores and result in the formation of hierarchical porous structures. The thickness of the coating shell can be controlled by changing the adding amount of TEOS. The core-shell composites with the thickness of 35 nm possess high surface areas(about 528 m2·g-1), large pores(about 3.5 nm in diameter) on the silica shells. The composite molecular sieves display higher adsorption capacity for benzene(140.2 mg·g-1) and butyraldehyde(213.7 mg·g-1) than that of pristine ZSM-5 for benzene(99.2 mg·g-1) and butyraldehyde(134.7 mg·g-1). The composite molecular sieves show a wide application foreground for harmful gas adsorbent for environmental protection.