1. IoT Electrochemical Sensor with Integrated Ni(OH) 2 –Ni Nanowires for Detecting Formaldehyde in Tap Water.
- Author
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Trafela, Špela, Krishnamurthy, Abhilash, Soderžnik, Kristina Žagar, Kavčič, Urška, Karlovits, Igor, Klopčič, Beno, Šturm, Sašo, and Žužek, Kristina
- Subjects
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ELECTROCHEMICAL sensors , *INTERNET of things , *TELECOMMUNICATION systems , *VOLATILE organic compounds , *NANOWIRES , *COMMUNITIES , *FORMALDEHYDE - Abstract
Simple, low-cost methods for sensing volatile organic compounds that leave no trace and do not have a detrimental effect on the environment are able to protect communities from the impacts of contaminants in water supplies. This paper reports the development of a portable, autonomous, Internet of Things (IoT) electrochemical sensor for detecting formaldehyde in tap water. The sensor is assembled from electronics, i.e., a custom-designed sensor platform and developed HCHO detection system based on Ni(OH)2–Ni nanowires (NWs) and synthetic-paper-based, screen-printed electrodes (pSPEs). The sensor platform, consisting of the IoT technology, a Wi-Fi communication system, and a miniaturized potentiostat can be easily connected to the Ni(OH)2–Ni NWs and pSPEs via a three-terminal electrode. The custom-made sensor, which has a detection capability of 0.8 µM/24 ppb, was tested for an amperometric determination of the HCHO in deionized (DI) and tap-water-based alkaline electrolytes. This promising concept of an electrochemical IoT sensor that is easy to operate, rapid, and affordable (it is considerably cheaper than any lab-grade potentiostat) could lead to the straightforward detection of HCHO in tap water. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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