Superior ion release properties and antibacterial efficacy of nanostructured zeolites ion-exchanged with zinc, copper, and iron

摘要: Antimicrobial zeolites ion-exchanged with inexpensive transition metal ions (such as zinc, copper, and iron) are critically important for a broader adoption of the materials public health applications. Due to high surface area small particle sizes, nanozeolites particularly promising in enhancing efficacy zeolite-based antimicrobial materials. By using highly-crystalline nanostructured (FAU) textural mesoporosity, we report comprehensive study on characteristics zinc-, copper-, iron-ion exchanged nanozeolites, ion release properties, antibacterial against methicillin-resistant Staphylococcus aureus (MRSA), well comparison properties those obtained corresponding microsized zeolites. Superior were observed both zinc copper zeolite X, up 73% 36% their initial loadings, compared 50% 12%, respectively, zeolites, validating importance nanostructuring enhanced diffusion through pore channels. The 2 hours minimum bactericidal concentration (MBC) saline X was 32 μg mL−1, half MBC 64 mL−1. Our results established superior host material ion-based antimicrobials, aforementioned improvements copper-exchanged previous studies.