DC Sputtered Ultralow Loading Gold Nanofilm Electrodes for Detection of As (III) in Water
DC Sputtered Ultralow Loading Gold Nanofilm Electrodes for Detection of As (III) in Water
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用于检测水中 As (III) 的直流溅射超低载量金纳米膜电极
DOI：
10.1149/2754-2726/ac6d67
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Garzon, Fernando H.
中科院分区：
文献类型：
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作者：
Casuse, Tybur Q.;Benavidez, Angelica;Plumley, John B.;Tsui, Lok-kun;Ali, Abdul-Mehdi;Cerrato, José M.;Garzon, Fernando H.
本研究探讨了使用直流溅射，物理气相沉积作为一种简便的方法来创建超低负载，用于检测水中as （III）的Au/C电极。与使用金属丝、箔或丝网印刷电极相比，在碳纸上溅射纳米膜电极大大减少了每个电极消耗的Au量，< 10 μg cm - 2。采用线性溶出伏安法（LSV）分析简便，易于自动化。研究人员还研究了在Vulcan XC 72 R碳上负载金纳米颗粒的电极，但由于高表面积碳的容性电流充电，因此不适合进行LSV分析。采用直流溅射、Au纳米膜电极建立了As （III）浓度在5 ~ 50 μg l−1之间的校准曲线，并在总As为5.5 μg l−1的地表水样品中采用标准添加法。根据浓度绘制的峰面积与USEPA最大污染物水平（MCL）为10 μg l−1以下的有意义检测显示出很强的线性相关性。据我们所知，这是第一个利用简单和可批量制造的直流溅射方法生产As （III）传感电极的研究。这项研究的结果对开发单用途、低成本的纳米膜电极用于场As （III）电分析具有重要意义。
This study investigates the use of DC sputtering, physical vapor deposition as a facile method for creating ultralow loading, Au/C electrodes for use in the detection of As (III) in water. The sputtered nanofilm electrodes on carbon papers, substantially reduces the amount of Au consumed per electrode,< 10 μg cm− 2, compared to use of wire, foil, or screen-printed electrodes. Linear stripping voltammetry (LSV) was chosen for analytical simplicity and ease of automation. Electrodes using Au nanoparticles supported on Vulcan XC 72 R carbon were also investigated but were not viable for LSV analysis due to capacitive current charging of the high surface area carbon. The DC sputtered, Au nanofilm electrodes were used to create calibration curves for concentrations of As (III) between 5 and 50 μg l− 1 and the standard addition method was used in a surface water sample with 5.5 μg l− 1 total As. Peak areas plotted against concentration displayed strong linear correlation with meaningful detection below the USEPA maximum contaminant level (MCL) of 10 μg l− 1. To our knowledge, this is the first study which utilizes the facile and mass manufacturable DC sputtering method to produce As (III) sensing electrodes. The results of this study have implications for the development of single use, low-cost nanofilm electrodes for field As (III) electroanalysis.