Department for Nanostructured Materials, Jožef Stefan Institute, Jamova c. 39, 1000 Ljubljana, Slovenia.
Jožef Stefan International Postgraduate School, Jamova c. 39, 1000 Ljubljana, Slovenia.
Sensors (Basel). 2023 May 11;23(10):4676. doi: 10.3390/s23104676.
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)-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)-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.
简单、低成本的挥发性有机化合物感测方法不会留下痕迹，也不会对环境造成不利影响，能够保护社区免受水源污染物的影响。本文报告了一种用于检测自来水中甲醛的便携式、自主、物联网 (IoT) 电化学传感器的开发。该传感器由电子器件组装而成，即定制设计的传感器平台和基于 Ni(OH)-Ni 纳米线 (NWs) 和合成纸基、丝网印刷电极 (pSPE) 的开发 HCHO 检测系统。传感器平台由物联网技术、Wi-Fi 通信系统和微型化的电化学工作站组成，可以通过三端电极轻松连接到 Ni(OH)-Ni NWs 和 pSPEs。该定制传感器具有 0.8 µM/24 ppb 的检测能力，在去离子 (DI) 和基于自来水的碱性电解质中对 HCHO 的电流测定进行了测试。这种易于操作、快速且经济实惠的电化学 IoT 传感器（它比任何实验室级别的电化学工作站都便宜得多）的有前途的概念可能会导致直接检测自来水中的 HCHO。
