Nasiriboroumand Majid, Montazer Majid, Barani Hossein
Department of Carpet, Faculty of Art, Shahid Bahonar University of Kerman, Kerman, Iran.
Textile Engineering Department, Amirkabir University of Technology, Tehran, Iran.
J Photochem Photobiol B. 2018 Feb;179:98-104. doi: 10.1016/j.jphotobiol.2018.01.006. Epub 2018 Jan 10.
The potential application of any nanoparticles, including silver nanoparticles (AgNPs), strongly depends on their stability against aggregation. In the current study, an aqueous extract of pomegranate peel was used as a stabilizer during synthesis of AgNPs. Nanoparticles have been prepared by the chemical reduction method from an aqueous solution of silver nitrate in the presence of sodium borohydride as a reducing agent. The AgNPs were characterized by dynamic light scattering (DLS), zeta-potential measurements, UV-Vis spectroscopy and transmission electron microscopy (TEM). The antibacterial efficiency of AgNPs against Escherichia coli was investigated. The size, polydispersity index, FWHM, and colloidal stability of nanoparticles in dispersion depends on the extract concentrations. In the presence of pomegranate peel extract, the nanoparticles suspension shows colloidal stability at least for a week. Our studies show that synthesized AgNPs with the above described procedure were stable at pH = 3-12 and in the temperature range of 25-85 °C. Additionally, AgNPs exhibit antibacterial properties, especially at the lowest amount of extract to silver ratio (K).
任何纳米颗粒，包括银纳米颗粒（AgNP）的潜在应用，在很大程度上取决于它们抗聚集的稳定性。在当前的研究中，石榴皮水提取物在AgNP合成过程中用作稳定剂。纳米颗粒通过化学还原法，以硼氢化钠作为还原剂，从硝酸银水溶液中制备而成。通过动态光散射（DLS）、zeta电位测量、紫外可见光谱和透射电子显微镜（TEM）对AgNP进行了表征。研究了AgNP对大肠杆菌的抗菌效率。分散液中纳米颗粒的尺寸、多分散指数、半高宽和胶体稳定性取决于提取物浓度。在石榴皮提取物存在的情况下，纳米颗粒悬浮液至少在一周内表现出胶体稳定性。我们的研究表明，通过上述方法合成的AgNP在pH值为3至12以及温度范围为25至85°C时是稳定的。此外，AgNP具有抗菌性能，特别是在提取物与银的比例（K）最低时。
