A magnetic plasma Fe3O4@Cu@Cu2O photoelectrochemical sensor for the detection of fumonisin B1†

IF 2.7 3区化学 Q2 CHEMISTRY, ANALYTICAL

Analytical Methods Pub Date : 2024-06-13 DOI:10.1039/D4AY00971A

Xiaodong Xue, Yanqiu Leng, Yanmei Li and Jinhuan Zhang

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Abstract

Fumonisin B1 (FB1) is a mycotoxin, a water-soluble metabolite produced by Fusarium cepacia, which mainly contaminates grain and its products and is acutely toxic and potentially carcinogenic to certain domestic animals. In this work, plasma nanocomposites of Fe₃O₄@Cu@Cu₂O with magnetic and optoelectronic properties were synthesized as a sensing platform. On one hand, the surface plasmon resonance (SPR) of metallic Cu accelerates the electron transfer rate. On the other hand, plasma-induced resonance energy transfer of metals and semiconductors can improve the utilization efficiency of light energy. A split photoelectrochemical (PEC) sensor based on Fe₃O₄@Cu@Cu₂O was proposed for the detection of FB1. The sensor has a wide linear range of 1.0–10 000 pg mL⁻¹ and a low detection limit of 0.28 pg mL⁻¹ (LOD, S/N = 3), which can realize the specific detection of FB1 in real samples.

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用于检测伏马菌毒素 B1 的磁等离子体 Fe3O4@Cu@Cu2O 光电化学传感器。

伏马菌素 B1（FB1）是一种霉菌毒素，是由麻风镰刀菌产生的水溶性代谢产物，主要污染粮食及其制品，对某些家畜有急性毒性和潜在致癌性。本研究合成了具有磁性和光电特性的 Fe3O4@Cu@Cu2O 等离子体纳米复合材料作为传感平台。一方面，金属铜的表面等离子体共振（SPR）加速了电子转移率。另一方面，等离子体诱导的金属和半导体共振能量转移可以提高光能的利用效率。研究人员提出了一种基于 Fe3O4@Cu@Cu2O 的分离式光电化学（PEC）传感器，用于检测 FB1。该传感器的线性范围宽至 1.0-10 000 pg mL-1，检出限低至 0.28 pg mL-1 (LOD, S/N = 3)，可实现对实际样品中 FB1 的特异性检测。

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