Amplified electrochemical detection of sulfadiazine based on Cu-BTC-encapsulated FeNi dual-atom catalysts with improved catalytic efficiency

文献类型： 外文期刊

第一作者： Li, Shuhuai

作者： Li, Shuhuai;Zhu, Yinian;Zhu, Zongqiang;Li, Shuhuai;Ma, Xionghui;Pang, Chaohai;Chen, Rui

作者机构：

期刊名称：ANALYTICAL METHODS （ 影响因子：2.6； 五年影响因子：2.8 ）

ISSN： 1759-9660

年卷期： 2025 年

页码：

收录情况： SCI

摘要： The amplification of detection signals is an important method for improving the sensitivity of electrochemical detection. This study presents an efficient strategy for preparing electrochemical catalytic materials using a simple self-assembly technique to encapsulate Fe single atoms (Fe-SAs) and Ni single atoms (Ni-SAs) in the Cu-benzene-1,3,5-tricarboxylic acid (Cu-BTC) metal-organic framework to form a Cu-BTC@FeNi-SAs catalytic system. Subsequently, Cu-BTC@FeNi-SAs was modified on the surface of a gold electrode, and sulfadiazine was used as a template to prepare a molecularly imprinted polymer (MIP) on the modified electrode. After eluting sulfadiazine, an MIP was obtained for specifically recognising sulfadiazine. When sulfadiazine was adsorbed by the MIP, a differential pulse voltammetry (DPV) signal occurred in response, thus detecting sulfadiazine. The adoption of Cu-BTC-fixed FeNi-SAs significantly facilitated mass transfer during the reaction, thus improving the DPV response signal. When used to detect sulfadiazine, the sensor had a linear range from 5 x 10-12 to 6000 x 10-12 mol L-1 and a detection limit of 1.14 x 10-12 mol L-1. It also successfully detected sulfadiazine residue in seawater and fish samples with recovery rates between 91.02% and 99.20%.

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