【摘要】 为在提高纳米银在蒙脱土上负载量的同时降低其粒径,将钠基蒙脱土(Na-MMT)在不同改性剂的水溶液中进行改性后通过在微波辅助下制备了银基蒙脱土(Ag-MMT),并通过紫外辐照或硼氢化钠将银离子还原为纳米银,结果显示经过紫外辐照48h的载银胱氨酸改性蒙脱土(Ag@A-MMT-48)具有高载银量和均一的纳米银尺度。最小抑菌圈法和抑菌率测试表明Ag@A-MMT-48对金黄色葡萄球菌和大肠杆菌均有良好的抑菌效果,蒙脱土的加入有助于吸附并杀死更多的细菌;将Ag@A-MMT-48应用于亚甲基蓝的降解时也显示出良好的催化性能。更多还原

【Abstract】 To obtain silver loaded montmorillonite(MMT)with increased silver content and small particle size,the Na-MMT was dispersed in different modifier solution via ion exchange reaction under microwave irradiation.Then silver ions were reduced to silver nanoparticles by UV irradiation or sodium borohydride.After 48h’s UV irradiation,the silver loaded MMT that was modified with cystine showed a high silver nanoparticle content and uniform particle size.The bacterial inhibition zone and inhibition ratio test result suggested the excellent antibacterial activity of Ag@A-MMT-48 against both Staphylococcus aureus and Escherichia coli.The significant surface area and adsorption capacities of MMT helped a lot to immobilize more bacteria on the surface and improved the antibacterial activity.And Ag@A-MMT-48 also showed remarkable activity for the catalytic degradation of methylene blue near room temperature.更多还原