Green synthesis and characterization of Ag nanoparticles in a phytic acid/ascorbic acid/sodium hydroxide system and their application in the electrochemical detection of H2O2,New Journal of Chemistry

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Green synthesis and characterization of Ag nanoparticles in a phytic acid/ascorbic acid/sodium hydroxide system and their application in the electrochemical detection of H2O2
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2023-03-23 , DOI: 10.1039/d2nj06332h
Baolong Niu _{1,

2} , Hong Wang _{1,

2} , Yanwei Zhang _{1,

2} , Bin Nie _{1,

2} , Huifang Wang ₂ , Xiaojie Lian _{3,

4} , Wenfeng Li _{1,

2}

Affiliation

Hydrogen peroxide (H₂O₂), as one of the most ubiquitous compounds, is widely used in many fields and performs important functions in physiological processes. Therefore, it is of great practical significance to develop a rapid and accurate detection method for trace H₂O₂ to avoid its harmful effects to human health and for environmental safety and medical diagnosis. In particular, Ag nanoparticles (Ag NPs) show great potential in the field of electrochemical H₂O₂ sensors because of their excellent electrocatalytic reduction activity to H₂O₂. Herein, plant extracts (phytic acid (PA) and ascorbic acid (AA)) obtained from biological methods were introduced into chemical synthesis methods, and a green synthesis system for controllable preparation of Ag NPs using PA/AA/NaOH was established. Moreover, the synthesis process and mechanism of PA coated Ag NPs (Ag NPs@PA) were described by means of XPS, particle size analysis and a schematic diagram. Furthermore, a simple electrochemical H₂O₂ sensor was constructed by modifying Ag NPs@PA onto the surface of a glassy carbon electrode (GCE). The sensor exhibited the characteristics of a quick response (∼0.3 s), good linear relationship, a wide linear range (1–4 μM, 4–6000 μM) and a low detection limit (1.5 μM) for H₂O₂ detection, showing excellent comprehensive detection performance. Its sensing mechanism and dynamic process were also investigated. In addition, the sensor presented outstanding selectivity, anti-interference, repeatability, reproducibility and feasibility of practical applications, providing a new strategy for the quantitative detection of H₂O₂.

中文翻译：

植酸/抗坏血酸/氢氧化钠体系中纳米银的绿色合成与表征及其在电化学检测H2O2中的应用

过氧化氢（H ₂ O ₂）作为最普遍存在的化合物之一，广泛应用于许多领域，并在生理过程中发挥重要作用。_{因此，发展一种快速、准确的痕量H 2} O ₂检测方法，避免其对人体健康的危害，对环境安全和医学诊断具有重要的现实意义。_{特别是，Ag 纳米粒子 (Ag NPs) 在电化学 H 2} O ₂传感器领域显示出巨大的潜力，因为它们对 H ₂ O _{2具有优异的电催化还原活性}. 在此，将通过生物方法获得的植物提取物（植酸（PA）和抗坏血酸（AA））引入化学合成方法，建立了使用PA/AA/NaOH可控制备Ag NPs的绿色合成体系。此外，通过 XPS、粒度分析和示意图描述了 PA 包覆的 Ag NPs (Ag NPs@PA) 的合成过程和机理。此外，通过将 Ag NPs@PA 修饰到玻碳电极 (GCE) 的表面，构建了一个简单的电化学 H ₂ O _{2传感器。}_{该传感器对H 2} O ₂具有响应快（~0.3 s）、线性关系好、线性范围宽（1-4 μM、4-6000 μM）和低检测限（1.5 μM）等特点。检测，表现出优异的综合检测性能。还研究了其传感机制和动力学过程。此外，该传感器表现出突出的选择性、抗干扰性、重复性、再现性和实际应用的可行性，为H 2 _O 2_的定量检测提供了新的策略。

更新日期：2023-03-23

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