School of Precision Instrument and Optoelectronic Engineering, the State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, 92 Weijin Road, Tianjin 300072, China.
School of Electrical and Electronic Engineering, Tianjin Key Laboratory of Film Electronic & Communication Devices, Advanced Materials and Printed Electronics Center, Tianjin University of Technology, Tianjin 300384, China.
Analyst. 2021 Sep 13;146(18):5610-5618. doi: 10.1039/d1an01012c.
The rapid development of industrial technologies continuously increases the heavy metal pollution of water resources. Recently, portable electrochemical analysis-based devices for detecting heavy metal ions have attracted much attention due to their excellent performance and low fabrication costs. However, it has proven difficult to accommodate complex testing needs in a cost-effective manner. To address these limitations, we propose a new system for the detection of heavy metals in wastewater using an organic light-emitting diode-based panel to display data in real time and Bluetooth to transmit data to a smartphone for rapid analysis. The fabricated device integrates an signal analysis circuit, a Bluetooth chip, a photocured 3D-printed shell, and an electrode sleeve interface. In addition, a fully screen-printed functional electrode plate containing chitosan/PANi-Bi nanoparticle@graphene oxide multi-walled carbon nanotubes is utilized for the rapid detection of heavy metal ions. This device can perform wireless data transmission and analysis and signal acquisition and processing. The sensor exhibits a high sensitivity (Hg: 88.34 μA ppm cm; Cu: 0.956 μA ppm cm), low limit of detection (Hg: 10 ppb, Cu: 0.998 ppm) and high selectivity during the detection of copper and mercury ions in tap water under non-laboratory conditions, and the results of real-time tests reveal that parameters measured in the field and laboratory environments are identical. Hence, this small, portable, electrochemical sensor with a screen-printed electrode can be effectively used for the real-time detection of copper and mercury ions in complex water environments.
工业技术的快速发展不断增加水资源的重金属污染。最近，基于便携式电化学分析的重金属离子检测设备由于其优异的性能和低廉的制造成本而受到广泛关注。然而，以具有成本效益的方式满足复杂的测试需求一直具有挑战性。为了解决这些限制，我们提出了一种使用基于有机发光二极管的面板实时显示数据和蓝牙将数据传输到智能手机进行快速分析的废水重金属检测新系统。所制造的设备集成了信号分析电路、蓝牙芯片、光固化 3D 打印外壳和电极套管接口。此外，还使用了包含壳聚糖/PANi-Bi 纳米颗粒@氧化石墨烯多壁碳纳米管的全印刷功能电极板，用于快速检测重金属离子。该设备可以进行无线数据传输和分析以及信号采集和处理。该传感器在非实验室条件下检测自来水中的铜和汞离子时表现出高灵敏度（Hg：88.34 μA ppm cm；Cu：0.956 μA ppm cm）、低检测限（Hg：10 ppb，Cu：0.998 ppm）和高选择性，实时测试结果表明现场和实验室环境测量的参数相同。因此，这种带有丝网印刷电极的小型、便携式电化学传感器可有效用于复杂水环境中铜和汞离子的实时检测。
