Electrochemical sensing of caffeic acid on natural biomass-pyrrole-functionalized magnetic biochar (PFMB) as promising SPE material

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL Microchimica Acta Pub Date : 2025-03-18 DOI:10.1007/s00604-025-07087-z

Imen Abidli, Mohamed Bououdina, Latifa Latrous, Adel Megriche

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Abstract

A peanut shell-modified screen-printed carbon electrode (SPE) was developed for the sensing of caffeic acid (CA) in saliva samples using cheap miniaturized analyzer composed of a laptop and an electrochemical workstation. Peanut shells, sourced from abundant biomass residues, were used to fabricate magnetic biochar (MB) and pyrrole-functionalized magnetic biochar (PFMB) with varying pyrrole/Fe ratios through a hydrothermal process. The surface morphology and electrochemical properties of the synthesized PFMB material were analyzed using XRD, FTIR, Raman, SEM, VSM, cyclic voltammetry, and differential pulse voltammetry techniques. The PFMB-modified SPE displayed excellent electrocatalytic response towards CA in a wide linear range from 10 to 600 μM with a low limit of detection of 0.08 μM. The enhanced electrocatalytic response could be ascribed to the synergistic effect of pyrrole-functionalized biochar and Fe₃O₄ on the newly designed probe. Moreover, the fabricated sensor was successfully utilized for real-time detection of CA in various samples. Quantum chemical modeling was performed to confirm the relevant findings to clarify the structure–activity relationship of CA adsorption on biochar.

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咖啡酸在天然生物质吡咯功能化磁性生物炭（PFMB）上的电化学传感研究

利用笔记本电脑和电化学工作站组成的廉价小型化分析仪，研制了花生壳修饰的丝网印刷碳电极（SPE），用于检测唾液样品中的咖啡酸（CA）。以花生壳为原料，通过水热法制备不同吡咯/铁比的磁性生物炭（MB）和吡咯功能化磁性生物炭（PFMB）。采用XRD、FTIR、Raman、SEM、VSM、循环伏安法和差分脉冲伏安法等技术对合成的PFMB材料的表面形貌和电化学性能进行了分析。pfmb修饰的SPE在10 ~ 600 μM的宽线性范围内对CA表现出良好的电催化反应，低检出限为0.08 μM。吡咯功能化的生物炭和Fe3O4在新型探针上的协同作用增强了电催化反应。此外，该传感器成功地用于各种样品中CA的实时检测。通过量子化学模型验证了相关发现，阐明了生物炭吸附CA的构效关系。图形抽象

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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.