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用于电化学传感器和抗菌应用的叶提取物模板法合成氧化钴纳米颗粒

Leaf Extract Templated Synthesis of CoO Nanoparticles for Electrochemical Sensor and Antibacterial Applications.

作者信息

Bekele Eneyew Tilahun, Murthy H C Ananda, Muniswamy Dhanalakshmi, Lemenh Yeshaneh Adimasu, Shume Minale Shegaw, Tadesse Ayanie Gezahegn, Kumar Avvaru Praveen, Ravikumar C R, Balachandran R, Roy Arpita

机构信息

Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P O Box 1888, Adama, Ethiopia.

Department of Physics, Government Science College (Nrupathunga University), Bengaluru 560 001, India.

出版信息

Bioinorg Chem Appl. 2022 Mar 8;2022:8440756. doi: 10.1155/2022/8440756. eCollection 2022.

DOI:10.1155/2022/8440756
PMID:35308018
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8924603/
Abstract

Green synthesis of metal oxide nanoparticles (NPs) is a viable alternative methodology because of cost-effective and availability of environmentally friendly templates for desired application, which has attracted the attention of researchers in recent years. In the present study, CoO NPs were synthesized in various volume ratios in the presence of leaf extract as a template. The synthesized CoO NPs were characterized by X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), surface area electron diffraction (SAED), UV-Vis diffuse reflectance spectroscopy (UV-DRS), and Fourier transform infrared (FTIR) spectroscopy. XRD analysis found that the average crystalline sizes for the 1 : 2, 1 : 1, and 2 : 1 volume ratios was 25.83, 21.05, and 27.98 nm, respectively. SEM-EDX and TEM analyses suggest that the green-synthesized CoO NPs are spherical in shape without the presence of impurities. The band gap values of the 1 : 2, 1 : 1, and 2 : 1 volume ratios of CoO NPs were found to be 1.83, 1.77, and 2.19 eV, respectively. FTIR analysis confirmed the presence of various bioactive ingredients within the leaf extract of . CoO NPs-modified electrodes showed better sensing capability towards ascorbic acid and citric acid due to enhanced electron transfer kinetics. Among three volume ratios (1 : 2, 1 : 1, and 2 : 1) of CoO nanoelectrodes, 1 : 1 and 2 : 1 were identified as the best performing nanoelectrodes. This is possibly due to the high catalytic behavior and the more homogenized surface structure. CoO (1 : 2) nanodrug showed the enhanced antibacterial activity (16 mm) towards which is attributed to the formation of enhanced reactive oxygen species (ROS).

摘要

金属氧化物纳米颗粒（NPs）的绿色合成是一种可行的替代方法，因为它具有成本效益且能提供适用于所需应用的环保模板，近年来吸引了研究人员的关注。在本研究中，以叶提取物为模板，按不同体积比合成了CoO NPs。通过X射线衍射（XRD）、扫描电子显微镜 - 能量色散X射线光谱（SEM - EDX）、透射电子显微镜（TEM）、高分辨率透射电子显微镜（HRTEM）、表面积电子衍射（SAED）、紫外 - 可见漫反射光谱（UV - DRS）和傅里叶变换红外（FTIR）光谱对合成的CoO NPs进行了表征。XRD分析发现，体积比为1∶2、1∶1和2∶1时的平均晶体尺寸分别为25.83、21.05和27.98 nm。SEM - EDX和TEM分析表明，绿色合成的CoO NPs呈球形且无杂质。CoO NPs体积比为1∶2、1∶1和2∶1时的带隙值分别为1.83、1.77和2.19 eV。FTIR分析证实了叶提取物中存在各种生物活性成分。CoO NPs修饰电极由于电子转移动力学增强，对抗坏血酸和柠檬酸表现出更好的传感能力。在CoO纳米电极的三种体积比（1∶2、1∶1和2∶1）中，1∶1和2∶1被确定为性能最佳的纳米电极。这可能是由于其高催化活性和更均匀的表面结构。CoO（1∶2）纳米药物对表现出增强的抗菌活性（16 mm），这归因于增强的活性氧（ROS）的形成。

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