BACKGROUND & AIMS:
:Herein, we report a one-pot microwave assisted method to prepare an efficient Fe2O3/Ag nanocomposites (NCs) using Aloe vera (A. vera) gel extract as a mild, safe, renewable and active stabilizer without any harmful reagent. The advanced characterization techniques including XRD, FT-IR, UV-DRS, PL, TGA, SEM-EDX, TEM, DLS, Elemental mapping, VSM and BET were applied to analyze the morphology and structure of the prepared Fe2O3/Ag NCs. The results exhibited that the Fe2O3/Ag NCs was successfully synthesized by greener route. Furthermore, these bio-reduced Fe2O3/Ag NCs was tested for its catalytic degradation toward methylene blue (MB) as a model contaminant and exhibited outstanding photocatalytic degradation efficiency with 88.2% removal rate in 140 min. It was worth pointing out that the Fe2O3/Ag nanoparticles facilitated the charge transportation and inhibit the charge recombination of an electron in the conduction band. Additionally, the prepared Fe2O3/Ag NCs was studied for their in-vitro antibacterial activity against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) bacteria and anticancer properties against A549 cell lines (human lung cancer). The biological results of this study demonstrated that A. vera gel extract derived Fe2O3/Ag NCs showed significant inhibition properties against bacterial strains and also capable of achieving superior action against A549 cancer cell lines.
背景与目标:
在这里,我们报告了一种使用芦荟 (a.vera) 凝胶提取物作为温和,安全,可再生和活性稳定剂而没有任何有害试剂的一锅微波辅助方法来制备高效的Fe2O3/Ag纳米复合材料 (NCs)。采用XRD,ft-ir,uv-drs,PL,TGA,sem-edx,TEM,DLS,元素映射,VSM和BET等先进的表征技术对制备的Fe2O3/Ag nc的形貌和结构进行了分析。结果表明,采用绿色路线成功合成了Fe2O3/Ag NCs。此外,测试了这些生物还原的Fe2O3/Ag NCs对作为模型污染物的亚甲基蓝 (MB) 的催化降解,并显示出出色的光催化降解效率,在140分钟内去除速率88.2%。值得指出的是,Fe2O3/Ag纳米颗粒促进了电荷传输并抑制了导带中电子的电荷复合。此外,还研究了制备的Fe2O3/Ag NCs对金黄色葡萄球菌 (S. aureus) 和大肠杆菌 (E. coli) 细菌的体外抗菌活性以及对A549细胞系 (人肺癌) 的抗癌特性。这项研究的生物学结果表明,A. vera凝胶提取物衍生的Fe2O3/Ag NCs对细菌菌株具有显着的抑制作用,并且能够对A549癌细胞株具有优异的作用。