利用番泻叶提取物生物合成氧化镍纳米粒子:退火温度和抗菌活性的影响

Monisha Ganesan , Ambrose Rejo Jeice , Prammitha Rajaram
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引用次数: 0

摘要

本研究采用番泻叶提取物制备氧化镍纳米结构,是一种经济有效且环保的绿色方法。XRD 研究表明,400 °C 和 500 °C 退火后的纳米结构为纯面心立方相,平均晶粒大小分别约为 27 nm 和 15 nm。扫描电镜结果表明,两种退火样品都接近球形,晶粒大小在 65 纳米到 74 纳米之间。通过紫外可见光研究,400 ℃ 和 500 ℃ 退火的氧化镍纳米粒子(NPs)的带隙分别估计为 5.28 eV 和 5.40 eV,而傅立叶变换红外光谱中出现的 Ni-O 伸展则验证了氧化镍的形成。此外,这项工作还证明了通过绿色途径合成的氧化镍 NPs 具有更好的抗菌活性。对 Serratia marcescens 和 Bacillus cereus 菌株而言,500 °C 退火后的 NiO NPs 的最大抑菌区分别为 20 毫米和 19 毫米,这表明这种材料可作为生物医学应用的前瞻性药物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Biosynthesis of NiO nanoparticles using Senna occidentalis leaves extract: Effects of annealing temperature and antibacterial activity

Biosynthesis of NiO nanoparticles using Senna occidentalis leaves extract: Effects of annealing temperature and antibacterial activity
In this work a cost effective and ecofriendly green method for the preparation of NiO nanostructures employing Senna occidentalis (S. occidentalis) leaves extract has been reported. XRD studies show that the 400 °C and 500 °C annealed nanostructures were authenticated as pure face centered cubic phase with an average crystallite size are about 27 nm and 15 nm, respectively. The SEM results show that both the annealed samples were nearly spherical with grain sizes ranging between 65 and 74 nm. The band gap of 400 °C and 500 °C annealed NiO nanoparticles (NPs) was estimated to be 5.28 eV and 5.40 eV, respectively from UV–visible studies while the occurrence of Ni-O stretching in the FTIR spectra validates the formation of NiO. Further this work witnesses that the NiO NPs synthesized from the green route offer better antibacterial activity. The observed maximum zone of inhibition of 500 °C annealed NiO NPs was found to be 20 mm and 19 mm for Serratia marcescens and Bacillus cereus strains and indicates that this material can serve as a prospective drug for biomedical application.
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