A sustainable approach for graphene-oxide surface decoration using Oxalis corniculata leaf extract-derived silver nanoparticles: their antibacterial activities and electrochemical sensing.,Dalton Transactions

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A sustainable approach for graphene-oxide surface decoration using Oxalis corniculata leaf extract-derived silver nanoparticles: their antibacterial activities and electrochemical sensing.
Dalton Transactions ( IF 3.5 ) Pub Date : 2020-06-16 , DOI: 10.1039/d0dt01747g
Varsha Jakhar ₁ , D K Sharma

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In this work, a facile green synthesis using Oxalis corniculata leaf extract (OCLE) as a biodegradable reducing and capping/stabilizing agent was carried out for the construction of Oxalis corniculata leaf extract–derived silver nanoparticles (OCLE-AgNPs). Moreover, OCLE-AgNPΔGO nanocomposites were fashioned simply by mixing a GO suspension and supernatant OCLE-AgNPs via a one-pot environmentally benign method. The AgNPΔGO nanocomposites are biocompatible materials for potential applications such as antibacterial activities against two different types of bacterial cells, namely Gram-positive Bacillus subtilis and Gram-negative Escherichia coli and selective electrochemical sensing to itraconazole (ITRA) at the fabricated GCE (AgNPΔGO@GCE). AgNPΔGO@GCE sensors gave excellent outcomes for ITRA as higher current response over the bare GCE. Under optimized conditions, the oxidation peak current of ITRA varied linearly with a wide range of the concentration between 26.7 μM and 103.8 μM with a correlation coefficient of 0.997 and a detection limit of 0.1276 μM, for differential pulse anodic stripping voltammetric (DP-ASV) technique. In addition, the possible mechanism for the ITRA oxidation was further verified and explained by single-electron transfer (SET) and proton removal mechanism steps. The developed sensor exhibited good repeatability, reproducibility, and stability. The use of environmentally benign and renewable plant material offers enormous benefits of eco-friendliness applicability.

中文翻译：

使用山茱Ox叶提取物衍生的银纳米颗粒进行氧化石墨烯表面装饰的可持续方法：它们的抗菌活性和电化学感应。

在这项工作中，一个浅显的绿色合成使用酢浆草叶提取物（OCLE）作为可生物降解的减少和封端剂/稳定剂用于建设进行酢浆草叶提取物衍生的银纳米颗粒（OCLE-的AgNPs）。此外，OCLE-AgNP Δ GO纳米复合材料通过混合一个GO悬浮液和上清液OCLE-的AgNPs简单地造出通过一釜环境友好的方法。所述AgNP Δ GO纳米复合材料是潜在的应用，例如对两种不同类型的细菌细胞，即革兰氏阳性抗菌活性的生物相容材料枯草芽孢杆菌和革兰氏阴性大肠杆菌和选择性的电化学感测到伊曲康唑（ITRA）在所制造的GCE（AgNP Δ GO @ GCE）。银纳米颗粒ΔGO @ GCE传感器为ITRA提供了出色的结果，因为其电流响应比裸露的GCE高。在优化条件下，对于差分脉冲阳极溶出伏安法（DP-ASV），ITRA的氧化峰值电流在26.7μM至103.8μM的宽浓度范围内线性变化，相关系数为0.997，检测极限为0.1276μM技术。此外，通过单电子转移（SET）和质子去除机理步骤进一步验证和解释了ITRA氧化的可能机理。开发的传感器具有良好的重复性，可重复性和稳定性。使用对环境无害的可再生植物材料可带来巨大的生态友好适用性。

更新日期：2020-06-29

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