Abstract
A novel electrochemical sensor has been fabricated for sensitive determination of zearalenone (ZEA) in food samples based on molybdenum disulfide quantum dots (MoS2 QDs) and two-dimensional titanium carbide (2D-Ti3C2Tx MXene) co-modified multi-walled carbon nanotube (MWCNT) heterostructure. Physical and electrochemical characterizations reveal that 2D-Ti3C2Tx and MoS2 QDs co-modified MWCNTs yields synergistic signal amplification effect, together with large specific surface area and excellent conductivity for the heterostructure, endowing the developed sensor with high detection performance to ZEA. Under optimized conditions, the sensor shows a wide linear range from 3.00 to 300 ng mL−1 and a low limit of detection (LOD) of 0.32 ng mL−1, which is far lower than the maximum residue limits (MRLs) settled by the European Commission. In addition, it exhibits excellent selectivity, high reproducibility with a relative standard deviation (RSD) of 1.1%, and good repeatability (RSD 1.1%). In real sample analysis recoveries ranged from 94.8 to 105% showing the proposed electrochemical sensor has high potential in practical applications. This work presents an effective and valuable pathway for the use of novel heterostructure in the biosensing field.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This work was granted by the National Natural Science Foundation of China (31660492, 32060575) and the Natural Science Foundation of Jiangxi Province (20192ACBL20019, 20181BAB204017, 20171BAB214038).
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Hao Huang: conceptualization, experimental measurement, writing review, and editing. María Belén Camarada: conceptualization, methodology, and theory analysis. Dan Wang: manuscript revision. Xiaoning Liao: project administration, manuscript revision, and supervision. Wanming Xiong: characterization, review, and editing. Juan Du: review and editing. Jianhua Xiong: conceptualization. Yanping Hong: review and editing.
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Huang, H., Camarada, M.B., Wang, D. et al. MoS2 quantum dots and titanium carbide co-modified carbon nanotube heterostructure as electrode for highly sensitive detection of zearalenone. Microchim Acta 189, 15 (2022). https://doi.org/10.1007/s00604-021-05104-5
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DOI: https://doi.org/10.1007/s00604-021-05104-5