Solid State Chemistry Laboratory (LQES), Chemistry Institute, State University of Campinas, Campinas, São Paulo, Brazil.
Nanomedicine. 2012 Aug;8(6):935-40. doi: 10.1016/j.nano.2011.11.012. Epub 2011 Dec 23.
In this article, we report the use of nanostructured silver vanadate as a promising antibacterial additive to water-based paints that has potential for applications in bathrooms, kitchens, and hospital environments. This hybrid nanomaterial was prepared by a simple and fast precipitation reaction involving silver nitrate and ammonium vanadate, dismissing the hydrothermal treatment. The preparation involved using Ag vanadate nanowires (β-AgVO(3)) with diameters ranging from 20 to 60 nm and decorated with silver (Ag) nanoparticles (NPs) with diameters ranging from 5 to 40 nm. Results of antibacterial tests show that this hybrid material has a promising antibacterial activity against several types of bacteria strains, such as methicillin-resistant Staphylococcus aureas (MRSA), Enterococcus faecalis, Escherichia coli, and Salmonella enterica Typhimurium. The evaluated material exhibits antibacterial activity 30 times larger than that of Oxacillin. In addition, this nanomaterial was tested as an antibacterial additive to water-based paints, and formulations with 1% show a 4-mm inhibition zone against a MRSA strain.
本文报道了将纳米结构的钒酸银用作水基涂料中具有潜在应用前景的抗菌添加剂，可用于浴室、厨房和医院环境。这种混合纳米材料是通过一种简单快速的沉淀反应制备的，涉及硝酸银和钒酸铵，无需水热处理。制备过程中使用了直径在 20 至 60nm 之间的钒酸银纳米线（β-AgVO(3)），并装饰有直径在 5 至 40nm 之间的银（Ag）纳米颗粒（NPs）。抗菌测试结果表明，这种混合材料对多种细菌菌株具有良好的抗菌活性，如耐甲氧西林金黄色葡萄球菌（MRSA）、粪肠球菌、大肠杆菌和肠炎沙门氏菌 Typhimurium。评价材料的抗菌活性比苯唑西林大 30 倍。此外，还将该纳米材料测试为水基涂料中的抗菌添加剂，含 1%的配方对 MRSA 菌株显示出 4mm 的抑制区。
