Analyses of surface area, porosity, silver release and antibacterial activity of amine-functionalized, silver-exchanged zeolite NaY. (September 2017)

• Record Type: Journal Article
• Authors: Hanim, Siti Aishah Mohd; Malek, Nik Ahmad Nizam Nik; Ibrahim, Zaharah
• Is Part Of: Vacuum. Volume 143(2017)
• Page Start: 344
• Page End: 347
• Publication Date: 2017-09
• Subjects: Zeolite NaY -- Ag-zeolite -- Functionalization -- Antibacterial activity -- Interfaces; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2017.06.038
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: Silver (Ag)-based materials are widely used as effective antibacterial agents for a wide spectrum of bacteria. There is a great challenge to reduce the amount of Ag in Ag-based materials without limiting its antibacterial activity. Herein, the Ag-zeolite NaY (50% from its cation exchange capacity) was functionalized with 3-aminopropyltriethoxysilane to produce an amine functionalized, Ag-zeolite NaY. The results showed that the functionalization of Ag-zeolite NaY improved its antibacterial activity against a wide spectrum of bacteria ( Escherichia coli ATCC11229 and Staphylococcus aureus ATCC6538), especially in solutions containing electrolyte (saline solution), although it has a lower surface area, pore volume and amount of Ag released compared to those of zeolite NaY and Ag-zeolite NaY. Thus, the functionalization of Ag-based materials is a promising approach to reducing the amount of Ag required in Ag-based material while improving its antibacterial activity. Graphical abstract: Highlights: Silver-exchanged zeolite NaY was functionalized with 3-aminopropyltriethoxysilane (APTES). Surface area and pore volume of Ag-zeolite NaY decreased after functionalized with APTES. Amine functionalized Ag-zeolite NaY has higher antibacterial activity. Lower amount of Ag released from amine functionalized Ag-zeolite NaY.