A portable system for photoelectrochemical detection of lactate on TiO2 nanoparticles and [Ni(salen)] polymeric film
A portable system for photoelectrochemical detection of lactate on TiO2 nanoparticles and [Ni(salen)] polymeric film
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DOI：
10.1016/j.snb.2021.130390
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发表时间：
2021-07-02
影响因子：
8.4
通讯作者：
Oliveira Jr, Osvaldo N.
中科院分区：
文献类型：
--
作者：
Bott-Neto, Jose L.;Martins, Thiago S.;Oliveira Jr, Osvaldo N.
本文介绍了一种由丝网印刷碳电极（spce）和3w发光二极管（LED）组成的便携式光电电化学系统。将3D打印结构的装置应用于在[Ni(salen)]聚合物膜修饰的TiO2纳米颗粒（简称TiO2@poly[Ni (salen)]）上检测乳酸。电极包覆聚合物提高了光电化学传感器的灵敏度，其线性范围为0.1 ~ 20 mmol L-1，检出限（LOD）为88 μ mol L-1。该传感系统具有良好的稳定性、重复性和选择性。我们还通过原位傅里叶变换红外光谱（FTIR）测量证明，二氧化碳（CO2）是TiO2@poly上乳酸盐光电氧化的主要产物[Ni(salen)]。便携式系统可以与任何类型的修饰电极一起使用，作为光电分析（生物）传感器，特别是用于即时诊断。
In this paper we present a portable photoelectrochemical system developed with screen-printed carbon electrodes (SPCEs) and a 3 W light-emitting diode (LED). The device with 3D printed structure was applied for detecting lactate on TiO2 nanoparticles modified with [Ni(salen)] polymer film (referred to as TiO2@poly[Ni (salen)]). Electrode coating with the polymer increased the sensitivity of the photoelectrochemical sensor, resulting in a linear range from 0.1 to 20 mmol L-1 with a limit of detection (LOD) of 88 mu mol L-1. The sensing system exhibited excellent stability, reproducibility, and selectivity. We also demonstrated by in situ Fouriertransform infrared spectroscopy (FTIR) measurements that carbon dioxide (CO2) is the main product from photoelectrooxidation of lactate on TiO2@poly[Ni(salen)]. The portable system can be employed with any type of modified electrodes to function as photoelectroanalytical (bio)sensors, especially for point-of-care diagnostics.