Oxygen vacancy-rich Fe2(MoO4)3 combined with MWCNTs for electrochemical sensors of fentanyl and its analogs

被引:2
作者
Zhao, Zhidong [1 ,2 ,3 ]
Qi, Xingrui [1 ,2 ]
He, Yuan [1 ,4 ,5 ]
Li, Nian [1 ,2 ]
Lai, Huajie [1 ,2 ,4 ,6 ,7 ,8 ]
Liu, Bo [1 ,2 ,4 ,6 ,7 ,8 ]
Chen, Yufang [1 ,2 ,4 ,6 ,7 ,8 ]
Jin, Tao [1 ,2 ,4 ,6 ,7 ,8 ]
机构
[1] Chinese Acad Sci, Guangzhou Inst Chem, Guangzhou 510650, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100000, Peoples R China
[3] Guizhou Police Coll, Guiyang 550005, Peoples R China
[4] CAS Testing Tech Serv Guangzhou Co Ltd, Guangzhou 510650, Peoples R China
[5] Guangdong Ind Polytech, Guangzhou 510300, Peoples R China
[6] Chinese Acad Sci, CAS Engn Lab Special Fine Chem, Guangzhou 510650, Peoples R China
[7] Guangdong Prov Key Lab Organ Polymer Mat Elect, Guangzhou 510650, Peoples R China
[8] Chinese Acad Sci, Guangzhou Inst Chem, West Ctr, Chongqing 400714, Peoples R China
基金
中国国家自然科学基金;
关键词
Fentanyl; Oxygen vacancy; r-Fe-2(MoO4)(3)/MWCNT composites; Electrochemical detection; Modified glassy carbon electrode; Differential pulse voltammetry; PERFORMANCE LIQUID-CHROMATOGRAPHY; MOS2 ULTRATHIN NANOSHEETS; GAS-CHROMATOGRAPHY; EVOLUTION REACTION; PLASMA; WATER; OXIDATION; DYE;
D O I
10.1007/s00604-024-06222-6
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Hundreds of thousands of people dying from the abuse of fentanyl and its analogs. Hence, the development of an efficient and highly accurate detection method is extremely relevant and challenging. Therefore, we proposed the introduction of oxygen defects into Fe-2(MoO4)(3) nanoparticles for improving the catalyst performance and combining it with multi-walled carbon nanotubes (MWCNTs) for electrochemical detection of fentanyl and its analogs. Oxygen vacancy-rich Fe-2(MoO4)(3) (called r-Fe-2(MoO4)(3)) nanoparticles were successfully synthesized and characterized in detail by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive spectrometry (EDS), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Raman spectra, BET, X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR) and investigated by comparison with oxygen vacancy-poor Fe-2(MoO4)(3) (called p-Fe-2(MoO4)(3)). The obtained oxygen vacancy-rich Fe-2(MoO4)(3) was ultrasonically composited with MWCNTs for modification of glassy carbon electrodes (GCEs) used for the electrochemical detection of fentanyl and its analogs. The modified MWCNT-GCE showed ultrasensitivity to fentanyl, sufentanil, alfentanil, and acetylfentanyl with limits of detection (LOD) of 0.006 mu mol center dot L-1, 0.008 mu mol center dot L-1, 0.018 mu mol center dot L-1, and 0.024 mu mol center dot L-1, respectively, and could distinguish among the four drugs based on their peak voltages. Besides, the obtained r-Fe-2(MoO4)(3)/MWCNT composite also exhibited high repeatability, selectivity, and stability. It showed satisfactory detection performance on real samples, with recoveries of 70.53 similar to 94.85% and 50.98 similar to 82.54% in serum and urine for the four drugs in a concentration range 0.2 similar to 1 mu M, respectively. The experimental results confirm that the introduction of oxygen vacancies effectively improves the sensitivity of fentanyl electrochemical detection, and this work provides some inspiration for the development of catalytic materials for electrochemical sensors with higher sensitivity.
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页数:13
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