دورية أكاديمية
Gold Thin Film Electrodes for High Sensitivity & Selectivity Electrochemical Detection of Arsenite in Water
| العنوان: | Gold Thin Film Electrodes for High Sensitivity & Selectivity Electrochemical Detection of Arsenite in Water |
|---|---|
| المؤلفون: | Casuse Driovínto, Tybur Q. |
| المصدر: | Civil Engineering ETDs |
| بيانات النشر: | UNM Digital Repository |
| سنة النشر: | 2023 |
| المجموعة: | UNM Digital Repository (The University of New Mexico) |
| مصطلحات موضوعية: | Arsenic, Electrochemical Detection, Water Sensors, Well Oriented Au(111) Surfaces, Nanofilms, Civil and Environmental Engineering, Environmental Engineering, Other Chemical Engineering |
| الوصف: | This is partial fulfillment of a dissertation defense on electrochemical detection of Arsenic (As) in water using gold (Au) nanofilms as sensing electrodes. The maximum contaminant level of Arsenic in drinking water is set at 10 g L-1 by the WHO and USEPA. Electrochemical detection by linear stripping voltammetry has comparable detection limits to more expensive laboratory-based methods but with added benefits of being portable and manufacturable. The work has developed sputtered and crystallographically oriented nanofilms for detection of trace As (III). Ultraflat Au(111) oriented thin films, Au(UTF), were compared to single crystal model electrodes to identify the impacts of controlled surface atom geometry during fundamental electrochemistry studies. We found that the Au(111) surface structure had the highest sensitivity and selectivity for As (III) detection and the Au(UTF) performed very similar to the Au(111) single crystal model electrode for detection of As (III). The Au(UTF)s were then tested to determine the ability to detect trace As when its primary competing contaminant, Cu (II), was also present. Experiments with As & Cu mixtures provided evidence of an intermetallic alloy which had a large impact on the ability to detect trace As at the Au(UTF) surface. This study has implications for manufacturable and low Au loading sensing electrodes. The work is intended to increase availability of high sensitivity detection of As in drinking water for rural areas where mining legacies and groundwater usage have resulted in increased exposure to As (III). |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://digitalrepository.unm.edu/ce_etds/306Test; https://digitalrepository.unm.edu/context/ce_etds/article/1327/viewcontent/2023_06_28_TQCD_Dissertation.pdfTest |
| الإتاحة: | https://digitalrepository.unm.edu/ce_etds/306Test https://digitalrepository.unm.edu/context/ce_etds/article/1327/viewcontent/2023_06_28_TQCD_Dissertation.pdfTest |
| رقم الانضمام: | edsbas.76A712DD |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |