同时合成磺化还原氧化石墨烯@氧化石墨烯混合材料,用于饮用水中银离子的高效电化学传感

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
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引用次数: 0

摘要

饮用水质量是当今世界最令人担忧的问题之一。银离子(Ag+)是重金属离子之一,会严重降低水质,进而影响人类健康。因此,世界卫生组织(WHO)将饮用水中这些离子的最大可接受浓度定为约 0.93 µM。因此,开发经济高效的技术和工具,帮助量化饮用水中的 Ag+ 离子具有重要意义。在此,我们采用一种新的、简单、环保和低成本的合成路线合成了一种可持续的混合碳材料,即磺化还原氧化石墨烯@氧化石墨烯(S-rGO@GO),并将其用作饮用水中 Ag+ 离子电分析的电极材料。XRD 、拉曼光谱、XPS、FE-SEM 和 EDX 证明了 S-rGO@GO 的成功合成。S-rGO@GO 的电化学特性表明其对 Ag+ 具有良好的亲和性和电子传输能力。用 S-rGO@GO 制备的传感器(S-rGO@GO/GCE)具有良好的重复性和再现性。对 S-rGO@GO/GCE 进行优化后发现,当在超纯水中使用 5 µL 1 mg/mL 的 S-rGO@GO 悬浮液进行制备,并在 -0.S-rGO@GO/GCE 的校准在 0.2 至 1.4 µM 的浓度范围内呈线性关系,灵敏度为 (0.605 ± 0.015) µA/µM;统计 LOD 为 0.0007 µM。此外,S-rGO@GO/GCE 在实际样品分析中显示出巨大的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Simultaneous synthesis of sulfonated reduced graphene oxide@graphene oxide hybrid material for efficient electrochemical sensing of silver ions in drinking water

Simultaneous synthesis of sulfonated reduced graphene oxide@graphene oxide hybrid material for efficient electrochemical sensing of silver ions in drinking water

One of the most important concerns around the world nowadays is the drinking water quality. Silver ions (Ag+) are one of the heavy metal ions that can seriously degrade the water quality and therefore, the human health. Hence, the World Health Organization (WHO) fixed the maximum acceptable concentration of these ions in drinking water at approximately 0.93 µM. Thus, the development of cost-effective and efficient techniques and tools that can help to quantify Ag+ ions in drinking water is of great importance. Herein, we used a new, simple, eco-friendly and low-cost synthesis route to synthesize a sustainable hybrid carbon material, namely sulfonated reduced graphene oxide@graphene oxide (S-rGO@GO) that was utilized as electrode material for Ag+ ions electroanalysis in drinking water. The successful synthesis of S-rGO@GO was evidenced by XRD, Raman spectroscopy, XPS, FE-SEM and EDX. The electrochemical characterization of S-rGO@GO revealed its good affinities towards Ag+ and its good electron transport abilities. The sensor prepared from S-rGO@GO (S-rGO@GO/GCE) showed good repeatability and reproducibility. S-rGO@GO/GCE optimization revealed that its best performance is achieved when 5 µL of 1 mg/mL of S-rGO@GO suspension in ultrapure water is used for its fabrication and when the electrodeposition (Ag+ to Ag0) is carried out at -0.1 V vs. SCE for 200 s. The calibration of S-rGO@GO/GCE exhibited a linear relationship in the concentration range of 0.2 to 1.4 µM, with a sensitivity of (0.605 ± 0.015) µA/µM; the statistic LOD was found to be 0.0007 µM. Furthermore, S-rGO@GO/GCE has shown a great potential for real samples analysis.

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来源期刊
Carbon Trends
Carbon Trends Materials Science-Materials Science (miscellaneous)
CiteScore
4.60
自引率
0.00%
发文量
88
审稿时长
77 days
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