Biosynthesis of Silver Nanoparticles Using Leaves of Acacia Melanoxylon and their Application as Dopamine and Hydrogen Peroxide Sensors

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Physical Chemistry Research Pub Date : 2020-03-01 DOI:10.22036/PCR.2019.205211.1688

Shashanka Rajendrachari, K. Be

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引用次数: 53

Abstract

In this work, we described a cost-effective and environmentally friendly technique for green synthesis of colloidal silver nanoparticles from aqueous extract of fresh leaves of Acacia melanoxylon and its application as a dopamine and hydrogen peroxide sensor. The prepared silver nanoparticles were characterized by UV-Visible absorption spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), zeta-potential analysis, thermogravimetric analysis (TGA), differential scanning calorimeter (DSC), etc. This method was found to be cost-effective, eco-friendly when compared to that of chemical and physical methods of nanoparticle synthesis. Silver nanoparticles modified carbon paste electrode (CPE) was fabricated for the detection of dopamine and hydrogen peroxide. The fabricated electrode showed an excellent sensitivity towards the oxidation of both dopamine (DA) and hydrogen peroxide (H2O2) in 0.1M phosphate buffer (PBS) solution at a pH 7. The effect of the scan rate, the concentration of the modifier and the analyte were studied by the cyclic voltammetric technique. The result exhibits good electrocatalytic activity, diffusion-controlled process and linear increase in peak current with different concentrations of dopamine and hydrogen peroxide.

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黑刺槐叶合成纳米银及其在多巴胺和过氧化氢传感器中的应用

在这项工作中，我们描述了一种经济、环保的绿色合成胶体银纳米粒子的技术，该技术是由黑刺槐鲜叶的水提取物及其作为多巴胺和过氧化氢传感器的应用。采用紫外-可见吸收光谱、x射线衍射(XRD)、扫描电镜(SEM)、ζ电位分析(zeta-potential analysis)、热重分析(TGA)、差示扫描量热仪(DSC)等对制备的纳米银进行了表征。与化学和物理合成纳米粒子的方法相比，该方法具有成本效益和生态友好性。制备了纳米银修饰碳糊电极(CPE)，用于多巴胺和过氧化氢的检测。在pH为7的0.1M磷酸缓冲液(PBS)溶液中，所制备的电极对多巴胺(DA)和过氧化氢(H2O2)的氧化均表现出良好的敏感性。采用循环伏安法研究了扫描速率、改性剂浓度和被分析物浓度的影响。结果表明，不同浓度的多巴胺和过氧化氢均具有良好的电催化活性和扩散控制过程，峰电流呈线性增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

8.30%

发文量

期刊介绍： The motivation for this new journal is the tremendous increasing of useful articles in the field of Physical Chemistry and the related subjects in recent years, and the need of communication between Physical Chemists, Physicists and Biophysicists. We attempt to establish this fruitful communication and quick publication. High quality original papers in English dealing with experimental, theoretical and applied research related to physics and chemistry are welcomed. This journal accepts your report for publication as a regular article, review, and Letter. Review articles discussing specific areas of physical chemistry of current chemical or physical importance are also published. Subjects of Interest: Thermodynamics, Statistical Mechanics, Statistical Thermodynamics, Molecular Spectroscopy, Quantum Chemistry, Computational Chemistry, Physical Chemistry of Life Sciences, Surface Chemistry, Catalysis, Physical Chemistry of Electrochemistry, Kinetics, Nanochemistry and Nanophysics, Liquid Crystals, Ionic Liquid, Photochemistry, Experimental article of Physical chemistry. Mathematical Chemistry.