Electrochemical activation of oxygen vacancy-rich TiO2@MXene as high-performance electrochemical sensing platform for detecting imidacloprid in fruits and vegetables

Yang, Jing; Deng, Changxi; Zhong, Wei; Peng, Guanwei; Zou, Jin; Lu, Yan; Gao, Yansha; Li, Mingfang; Zhang, Songbai; Lu, Limin

doi:10.1007/s00604-023-05734-x

Cited by 18 publications

(3 citation statements)

References 41 publications

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“…CV tests was further conducted to investigate the kinetics of the electrocatalytic oxidation of CuBDC-OH toward AA by varying the scan rates (figure S6). The peak currents display linear correlations with the square root of the scan rates, suggesting diffusion-controlled electrode kinetics [41,42]. Moreover, using Laviron's theory to calculate the electron transport rate (k s ) [43,44], the results show that the k s are 2.09 s −1 , 2.04 s −1 and 1.85 s −1 for CuBDC-OH-NSs, CuBDC-NRs and CuBDC-OH-bulk, respectively.…”

Section: = = ´mentioning

confidence: 92%

Tuning the morphology of Cu–MOFs nanostructures for sensitive ascorbic acid sensing

Wang

et al. 2023

Nanotechnology

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Metal organic frameworks (MOFs) are an attractive platform to develop fascinating electrocatalysts for the oxidation of ascorbic acid, and their different morphologies have been hinted in literature to impact their sensing performance. In this work, by varying the reaction medium of metal source and organic ligand, copper 2-hydroxybenzene-1,4-dicarboxylate (CuBDC-OH) nanosheets, nanorods and bulk were generated. Thereinto, CuBDC-OH nanosheets displayed the highest sensitivity of 151.99 μA·mM-1·cm-2 in the linear range of 12-1074 μM, which is 1.5 times greater than that of CuBDC-OH nanorods and 3.5 times greater than that of CuBDC-OH bulk. The electrochemical analyses manifested that the superiority of nanosheets originated from higher oxidative current, larger electrochemical active surface area and lower charge transfer resistance, which enabling the efficient electro-oxidation of ascorbic acid. Additionally, satisfactory selectivity, stability and reproducibility were obtained.

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confidence: 92%

Tuning the morphology of Cu–MOFs nanostructures for sensitive ascorbic acid sensing

Wang

et al. 2023

Nanotechnology

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“…For example, Ma et al inserted NH 2 -CNT into the interlayers of MXene via physical mixing to increase its interlayer spacing, effectively avoiding the self-restacking of MXene sheets [33]. Yang et al used Ti 3 C 2 T x MXene as the titanium source, and the TiO 2 acted as a scaffold which was uniformly grown on the surface of the MXene sheet using a simple in situ growth method, which also effectively prevented the interlayer stacking of MXene [34]. In contrast, TiO 2 @MXene obtained via an in situ growth method using MXene as a precursor was more appealing, as avoided not only the instability of physical incorporation, but also the cumbersome synthesis process of chemical doping [35].…”

Section: Introductionmentioning

confidence: 99%

A Molecularly Imprinted Electrochemical Sensor Based on TiO2@Ti3C2Tx for Highly Sensitive and Selective Detection of Chlortetracycline

Deng,

Liu,

Huang

et al. 2023

Molecules

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In view of the serious side effects of chlortetracycline (CTC) on the human body, it is particularly important to develop rapid, sensitive, and selective technologies for the detection of CTC in food. In this work, a molecularly imprinted electrochemical sensor with [Fe(CN)6]3−/4− as signal probe was proposed for the highly sensitive and selective detection of CTC. For this purpose, TiO2, which acts as an interlayer scaffold, was uniformly grown on the surface of Ti3C2Tx sheets through a simple two-step calcination process using Ti3C2Tx as the precursor to effectively avoid the stacking of Ti3C2Tx layers due to hydrogen bonding and van der Waals forces. This endowed TiO2@Ti3C2Tx with large specific surface, abundant functional sites, and rapid mass transfer. Then, polypyrrole molecularly imprinted polymers (MIPs) with outstanding electrical conductivity were modified on the surface of TiO2@Ti3C2Tx via simple electro-polymerization, where the pyrrole was employed as a polymeric monomer and the CTC provided a source of template molecules. This will not only provide specific recognition sites for CTC, but also facilitate electron transport on the electrode surface. The synergistic effects between TiO2@Ti3C2Tx and polypyrrole MIPs afforded the TiO2@Ti3C2Tx/MIP-based electrochemical sensor excellent detection properties toward CTC, including ultra-low limits of detection (LOD) (0.027 nM), a wide linear range (0.06–1000 nM), and outstanding stability, reproducibility, selectivity, and feasibility in real samples. The results indicate that this strategy is feasible and will broaden the horizon for highly sensitive and selective detection of CTC.

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“…18 Among them, electrochemical sensing detection methods have gradually gained widespread attention due to their high sensitivity, portability, rapidity, and low-cost advantages. 19 They have been applied in many fields such as environment, 20 medicine, 21 food, 22 and energy. 23 However, due to the effects of lower electrode kinetics and large overpotentials, 24 only modifying the electrode surface with the help of highly conductive electrocatalytic materials can improve the electron transfer rate and achieve rapid and sensitive detection of ACP.…”

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confidence: 99%

A Novel Electrochemical Sensing Based on Cerium Oxide/Nitrogen-Doped Reduced Graphene Oxide for Sensitive Detection of Acetaminophen

Qi,

Wang,

Yuan

et al. 2024

J. Electrochem. Soc.

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Acetaminophen (ACP), a common analgesic and antipyretic medication, can harm the liver when overdosed and its metabolites can contaminate the environment, so it is necessary to monitor the concentration precisely and reliably. In this work, we successfully synthesized cerium oxide/nitrogen-doped reduced graphene oxide (CeO2/N-rGO) composite nanomaterials using a one-step hydrothermal method. Using composite nanomaterials, we created an electrochemical sensing detection platform for ACP detection. The synthesized materials were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The constructed electrochemical sensor exhibits good ACP detection ability under the synergistic effect of CeO2 and N-rGO. Under optimal experimental conditions, the sensor displayed a linear range for the detection of ACP of 1~200 μM and the lowest detection limit of 0.79 μM, exhibiting outstanding selectivity, stability, and repeatability. Furthermore, the sensor was effectively applied to detect ACP in tap water samples, which offers a wide range of possible applications in actual sample testing.

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Electrochemical activation of oxygen vacancy-rich TiO2@MXene as high-performance electrochemical sensing platform for detecting imidacloprid in fruits and vegetables

Cited by 18 publications

References 41 publications

Tuning the morphology of Cu–MOFs nanostructures for sensitive ascorbic acid sensing

Tuning the morphology of Cu–MOFs nanostructures for sensitive ascorbic acid sensing

A Molecularly Imprinted Electrochemical Sensor Based on TiO2@Ti3C2Tx for Highly Sensitive and Selective Detection of Chlortetracycline

A Novel Electrochemical Sensing Based on Cerium Oxide/Nitrogen-Doped Reduced Graphene Oxide for Sensitive Detection of Acetaminophen

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