A novel electrochemical sensor based on hollow and porous N-doped carbon frameworks embedded with Co nanoparticles for the determination of 4-nitrophenol

IF 4.9 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchemical Journal Pub Date : 2025-09-06 DOI:10.1016/j.microc.2025.115218

Qirong Zhou , Yanting Zhou , Jiaqi Wu , Junjie Fei , Feng Wu , Yixi Xie , Li Zhang

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Abstract

4-Nitrophenol (4-NP), a priority pollutant with significant adverse effects on human health and the environment, necessitates the development of sensitive and reliable detection methods. Herein, we report a novel electrochemical sensor for 4-NP detection based on a ZIF-8-derived hollow and porous N-doped carbon framework embedded with uniformly dispersed cobalt nanoparticles (Co-HMCF). This material ingeniously integrates hierarchical structures, N-doping, and Co NPs loading, endowing it with excellent conductivity, a large specific surface area, and superior catalytic activity. These attributes synergistically enhance the electrochemical sensing performance. Under optimal conditions, the achieved wide linear range was 5 μM to 600 μM. The low detection limit of 0.79 μM with high sensitivity of 5.19 μA μM⁻¹ cm⁻² was obtained. Furthermore, the Co-HMCF sensor holds outstanding selectivity and stability. Therefore, the innovative structure and excellent properties of carbon frameworks make them alternative materials for various electrochemical sensors for the detection of other toxic organic pollutants.

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基于Co纳米粒子包埋的空心和多孔n掺杂碳框架的新型电化学传感器用于测定4-硝基苯酚

4-硝基苯酚（4-NP）是一种对人类健康和环境具有重大不利影响的重点污染物，需要开发灵敏可靠的检测方法。在此，我们报道了一种新型的用于4-NP检测的电化学传感器，该传感器基于zif -8衍生的中空多孔n掺杂碳框架，嵌入均匀分散的钴纳米颗粒（Co-HMCF）。这种材料巧妙地将分层结构、n掺杂和Co NPs负载结合在一起，使其具有优异的导电性、大的比表面积和优异的催化活性。这些特性协同提高了电化学传感性能。在最佳条件下，线性范围为5 μM ~ 600 μM。检测限为0.79 μM，灵敏度为5.19 μA μM−1 cm−2。此外，Co-HMCF传感器具有出色的选择性和稳定性。因此，碳框架的创新结构和优异性能使其成为检测其他有毒有机污染物的各种电化学传感器的替代材料。

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来源期刊

Microchemical Journal 化学-分析化学

CiteScore

8.70

自引率

8.30%

发文量

1131

审稿时长

1.9 months

期刊介绍： The Microchemical Journal is a peer reviewed journal devoted to all aspects and phases of analytical chemistry and chemical analysis. The Microchemical Journal publishes articles which are at the forefront of modern analytical chemistry and cover innovations in the techniques to the finest possible limits. This includes fundamental aspects, instrumentation, new developments, innovative and novel methods and applications including environmental and clinical field. Traditional classical analytical methods such as spectrophotometry and titrimetry as well as established instrumentation methods such as flame and graphite furnace atomic absorption spectrometry, gas chromatography, and modified glassy or carbon electrode electrochemical methods will be considered, provided they show significant improvements and novelty compared to the established methods.