Batch Preparation of Multi-parameter Sensor for Online and In-situ Monitoring of Tap Water

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-01-05 DOI:10.1016/j.electacta.2025.145664

Jiawen Yin, Shengkang Lu, Hanyang Tong, Jianqian Li, Rentao Cao, Shouhong Li, Wanlei Gao, Jie Zou, Qinghui Jin

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引用次数: 0

Abstract

The safety of drinking water is the most basic safeguard for the human survival. In-situ and on-line monitoring of tap water is considered an effective method to reduce the harm of tap water pollution, caused by pipeline rupture or leakage. However, a sensing device of the quality of tap water with the characteristic of anti-cross interference, in-situ, batch-fabrication always is a challenge issue. In this paper, a multi-parameter integrated micro-nano sensor, monitoring six key daily inspection indicators, is designed and prepared by MEMS technology on silicon substrate. By fabricating an all solid thin-film Ag/AgCl reference electrode, employing electrochemical stable/active Pt/Au/PbO₂/IrO₂ as the working/counter electrode and verified the effectiveness of as-fabricated sensor by pH/COD/Free Chlorine/Conductivity/Temperature detection, the sensor demonstrates acceptable limit of detection, desirable linearity and competitive accuracy. In addition, a miniature turbidity sensor is fixed on another side of the substrate, which can accurately distinguish turbidity changes of 0.1 NTU in the range of 0-1 NTU in dark environments. Particularly, a flow velocity detection unit is fabricated to avoid the data deviation by water flow fluctuation. By placing the electrode array in a tiny area (17*19*0.6 mm), a significant improvement in data accuracy is discovered for 9% after cross interference compensation. Finally, a circuit system is developed to assist as-proposed sensor in online and continuous monitoring of the tap water in pipeline. So, the interesting sensing behavior indicate that this work developed a competitive device for tap water online monitoring in pipeline.

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批量制备用于自来水在线和现场监测的多参数传感器

饮用水安全是人类生存最基本的保障。对自来水进行现场和在线监测被认为是减少管道破裂或泄漏造成的自来水污染危害的有效方法。然而，具有抗干扰、原位、批量制造特点的自来水水质传感装置一直是一个具有挑战性的问题。本文利用MEMS技术，在硅衬底上设计并制备了一种多参数集成微纳传感器，监测6个关键的日常检测指标。通过制备全固体薄膜Ag/AgCl参比电极，采用电化学稳定/活性Pt/Au/PbO2/IrO2作为工作/反电极，并通过pH/COD/游离氯/电导率/温度检测验证了传感器的有效性，该传感器具有可接受的检测限，理想的线性度和具有竞争力的精度。此外，在衬底的另一侧固定了微型浊度传感器，可以在黑暗环境中准确识别0-1 NTU范围内0.1 NTU的浊度变化。特别地，为了避免水流波动引起的数据偏差，制作了流速检测单元。通过将电极阵列放置在一个很小的区域（17*19*0.6 mm），发现交叉干扰补偿后数据精度显著提高9%。最后，开发了一种电路系统，以辅助所提出的传感器在线连续监测管道中的自来水。因此，有趣的传感行为表明，本工作开发了一种具有竞争力的管道自来水在线监测装置。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.