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Preparation of Monotheca buxifolia Leaves Mediated Silver Nanoparticles and Study of Their Biological Activities
Surface Engineering and Applied Electrochemistry Pub Date : 2020-10-28 , DOI: 10.3103/s1068375520050063
M. I. Khalil , R. Ullah , N. Gulfam , M. Zahoor

Abstract—

In the present study, M. buxifolia mediated silver nanoparticles (AgNPs) were synthesized by mixing different volumes of the plant extract and silver nitrate solutions. The prepared AgNPs were characterized by UV-spectrophotometry, scanning electron microscopy (SEM), energy dispersive X-ray (XRD) analysis, thermal gravimetric analysis (TGA), energy dispersive X-ray (EDX) analysis, fourier transform infrared (FTIR) microscopy, and a master size analysis. The prepared nanoparticles and extracts were evaluated for their anti-microbial and anti-oxidant potentials as well. UV-spectrophotometry showed that a ratio 1 : 10 of the M. buxifolia leaves aqueous extract to a silver solution was best for the AgNPs production. The size of AgNPs was found to be 45 nm, measured through SEM. The presence of silver in the prepared AgNPs was confirmed through EDX (peak at 3.4 keV). The crystalline nature and sizes of particles were determined by XRD while the particles size distribution by the master sizer, and the results were compared with those of SEM. TGA results showed a weight loss due to a loss of the moisture content in AgNPs. The IR spectra further confirmed the presence of Ag in the prepared nanoparticles, which was evident from a silver oxide peak in the spectrum. The AgNPs were found to be highly effective against Gram positive bacteria as compared to ethanolic, methanolic, chloroform, and ethyl acetate extracts. Gram negative bacteria showed less sensitivity to AgNPs whereas similar results were obtained against different tested species of fungi. Comparatively, AgNPs were more potent scavenger of the free radical than the tested extracts.



中文翻译:

介孔银叶纳米银粉的制备及其生物学活性的研究

摘要-

在本研究中,M. buxifolia介导的银纳米颗粒(的AgNPs)由植物提取物和硝酸银溶液的不同体积混合合成。通过紫外分光光度法,扫描电镜(SEM),能量色散X射线(XRD)分析,热重分析(TGA),能量色散X射线(EDX)分析,傅立叶变换红外光谱(FTIR)对制备的AgNP进行表征。显微镜和主尺寸分析。还评估了制备的纳米颗粒和提取物的抗微生物和抗氧化潜力。紫外分光光度法表明,buxifolia的比例为1:10将水提取物留在银溶液中最适合生产AgNPs。通过SEM测量,发现AgNP的尺寸为45nm。通过EDX(峰值为3.4 keV)确认了制备的AgNP中银的存在。用XRD测定颗粒的晶体性质和尺寸,用主粒度仪测定粒径分布,并将结果与​​SEM比较。TGA结果表明,由于AgNPs中水分含量的减少,重量有所减轻。红外光谱进一步证实了制备的纳米颗粒中存在银,这从光谱中的氧化银峰可以明显看出。与乙醇,甲醇,氯仿和乙酸乙酯提取物相比,发现AgNPs对革兰氏阳性细菌非常有效。革兰氏阴性细菌对AgNPs的敏感性较低,而针对不同测试真菌种类却获得了相似的结果。相比之下,AgNPs比测试提取物更有效地清除自由基。

更新日期:2020-10-30
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