Highly sensitive detection and mechanism study of tetracycline in water by CuFeO2/NiCo-LDH heterojunction electrochemical sensor

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchimica Acta Pub Date : 2025-09-06 DOI:10.1007/s00604-025-07508-z

Aijin Xiao, Meng Li, Yiluo Hu, Wei Zhang, Huiping Bai, Xuejun Pan, Fengzhi Jiang

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引用次数: 0

Abstract

A CuFeO₂/NiCo-LDH heterojunction electrochemical sensor (LDH: layered double hydroxide) was developed for the sensitive detection of tetracycline (TC). The sensor was constructed by integrating ZIF-67-derived nanocage NiCo-LDH on nickel foam with CuFeO₂, forming a p-n heterojunction that enhanced electron transfer and TC adsorption. The sensor exhibited bilinear detection ranges (0.00594 ~ 1 and 1 ~ 25 μM) and a low detection limit of 1.98 nM. Recoveries in real water samples ranged from 92.0 to 109.0%, with relative standard deviations not exceeding 4.5%. In situ Raman spectroscopy and density functional theory calculations confirmed the involvement of multiple redox pairs (Ni³⁺/Ni²⁺, Co³⁺/Co²⁺, Fe³⁺/Fe²⁺ and Cu²⁺/Cu⁺) and strong interfacial adsorption energy. This sensor presents a practical and efficient approach for onsite TC monitoring.

Graphical Abstract

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CuFeO2/NiCo-LDH异质结电化学传感器对水中四环素的高灵敏度检测及机理研究

研制了一种用于检测四环素（TC）的CuFeO2/NiCo-LDH异质结电化学传感器（LDH：层状双氢氧化物）。该传感器由zif -67衍生的纳米笼NiCo-LDH在泡沫镍上与CuFeO2集成而成，形成p-n异质结，增强了电子转移和TC吸附。该传感器具有双线性检测范围（0.00594 ~ 1和1 ~ 25 μM）和低检出限（1.98 nM）。实际水样的回收率为92.0 ~ 109.0%，相对标准偏差不超过4.5%。原位拉曼光谱和密度泛函理论计算证实了多种氧化还原对（Ni3+/Ni2+, Co3+/Co2+， Fe3+/Fe2+和Cu2+/Cu+）的参与和强界面吸附能。该传感器为现场TC监测提供了一种实用、高效的方法。图形抽象

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

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.