Ultrathin two-dimension metal-organic framework nanosheets/multi-walled carbon nanotube composite films for the electrochemical detection of H2O2

Wang, Cao-Yu; Huang, Shaomei; Luo, Lingzi; Zhou, Ying; Lu, Xingchang; Zhang, Geng; Ye, Huan; Gu, Jiangjiang; Cao, Fuyang

doi:10.1016/j.jelechem.2019.01.030

Cited by 53 publications

(18 citation statements)

References 59 publications

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“…Collectively, all of the above results indicate that the prepared sensor exhibits a significant response to H 2 O 2 . The sensing mechanism of Cu-TCPP on H 2 O 2 can be explained as follows − The variation of the composition of Cu-TCPP in sensing for H 2 O 2 was investigated by XPS, and the results are shown in Figure S2. Before sensing (before), the two separate peaks at 954 and 934.3 eV in the Cu2p XPS spectrum were caused by Cu 2p 1/2 and Cu 2p 3/2 transitions, respectively.…”

Section: Resultsmentioning

confidence: 99%

Amplified Electrochemical Hydrogen Peroxide Sensing Based on Cu-Porphyrin Metal–Organic Framework Nanofilm and G-Quadruplex-Hemin DNAzyme

Chen

Bai

et al. 2020

ACS Appl. Mater. Interfaces

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A novel electrochemical hydrogen peroxide (H 2 O 2 ) sensor based on Cu-porphyrin(Cu-TCPP)/G-quadruplex-hemin nanocomposite was constructed by assembling two-dimensional Cu-TCPP metal−organic framework (MOF) nanofilm and G-quadruplex-hemin DNAzyme. The Cu-TCPP synthesized by the surfactantassisted method has a wrinkled two-dimensional nanofilm morphology, which gives it a large surface area and accessible active sites. Cu-TCPP exhibits peroxidase activity and good stability and can catalyze the reduction of H 2 O 2 . In addition, Cu-TCPP can be used as a nanocarrier for G-quadruplex-hemin DNAzyme with strong peroxidase activity to achieve "biological barcode" amplification and improve stability. The cooperative interaction of Cu-TCPP and G-quadruplex-hemin DNAzyme effectively amplifies the electrochemical response signal. Electrochemical studies have shown that the constructed sensor exhibits good electrochemical sensing performance with three linear ranges: 0.08 μM to 0.11 mM, 0.11−0.91 mM, and 0.91−8.1 mM, with sensitivities of 2315.86, 301.00, and 65.71 μA/(mM cm 2 ), respectively, and the detection limit was 0.03 μM. In addition, the sensor shows good selectivity. In summary, this study provides a simple and effective new strategy for electrochemical sensing based on twodimensional MOFs and artificial enzymes.

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Section: Resultsmentioning

confidence: 99%

Amplified Electrochemical Hydrogen Peroxide Sensing Based on Cu-Porphyrin Metal–Organic Framework Nanofilm and G-Quadruplex-Hemin DNAzyme

Chen

Bai

et al. 2020

ACS Appl. Mater. Interfaces

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“…As shown in Figure 1B, a strong peak at approximately 1700 cm −1 in the FTIR spectrum of H 2 TCPP was observed, which was corresponding to the C=O stretching band. However, the peak became almost invisible in Cu-TCPP, and two new peaks exhibited near 1617 and 1402 cm −1 represented the OC-O-Cu bond [25][26][27]. This confirms the formation of coordination bonds between Cu 2+ and the carboxyl groups of Cu-TCPP.…”

Section: Characterization Of Cu-tcpp Nanosheetsmentioning

confidence: 56%

Cu-TCPP Nanosheets-Sensitized Electrode for Simultaneous Determination of Hydroquinone and Catechol

Wang

Peng

et al. 2022

Materials

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It is quite important to develop sensitive, simple, and convenient methods for the simultaneous determination of Hydroquinone (HQ) and Catechol (CC) due to their wide existence, the difficulty of degradation, and the high toxicity. Herein, Cu-TCPP nanosheets were prepared in N,N-dimethylformamide (DMF) through the solvent exfoliation method. The morphology and electrochemical performance of Cu-TCPP were characterized, revealing its stacked sheet structure with abundant pores, a fast electron transfer ability, and a large electrode active area. Using Cu-TCPP nanosheets as the sensitive material to modify the glassy carbon electrodes (Cu-TCPP/GCEs), it was found that they had an obvious enhancement effect on the electrochemical oxidation currents of HQ and CC. The signal enhancement mechanism was explored. The Cu-TCPP nanosheets not only enhanced the accumulation abilities of HQ and CC, but also improved their apparent catalytic rate, displaying high sensitivity for HQ and CC. The values of the detection limit were calculated to be 3.4 and 2.3 nM for HQ and CC. A satisfactory recovery was obtained when this method was used in measuring HQ and CC in the water samples.

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“…As observed, the H 2 O 2 detection performances of g-C 3 N 4 /CuWO 4 /GCE, containing the detection limit, linear range, and sensitivity, are comparable or lower than the reported H 2 O 2 sensing systems. 64–71…”

Section: Resultsmentioning

confidence: 99%

Preparation of a nonenzymatic electrochemical sensor based on a g-C₃N₄/MWO₄ (M: Cu, Mn, Co, Ni) composite for the determination of H₂O₂

et al. 2022

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Ultrathin two-dimension metal-organic framework nanosheets/multi-walled carbon nanotube composite films for the electrochemical detection of H2O2

Cited by 53 publications

References 59 publications

Amplified Electrochemical Hydrogen Peroxide Sensing Based on Cu-Porphyrin Metal–Organic Framework Nanofilm and G-Quadruplex-Hemin DNAzyme

Amplified Electrochemical Hydrogen Peroxide Sensing Based on Cu-Porphyrin Metal–Organic Framework Nanofilm and G-Quadruplex-Hemin DNAzyme

Cu-TCPP Nanosheets-Sensitized Electrode for Simultaneous Determination of Hydroquinone and Catechol

Preparation of a nonenzymatic electrochemical sensor based on a g-C₃N₄/MWO₄ (M: Cu, Mn, Co, Ni) composite for the determination of H₂O₂

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Ultrathin two-dimension metal-organic framework nanosheets/multi-walled carbon nanotube composite films for the electrochemical detection of H2O2

Cited by 53 publications

References 59 publications

Amplified Electrochemical Hydrogen Peroxide Sensing Based on Cu-Porphyrin Metal–Organic Framework Nanofilm and G-Quadruplex-Hemin DNAzyme

Amplified Electrochemical Hydrogen Peroxide Sensing Based on Cu-Porphyrin Metal–Organic Framework Nanofilm and G-Quadruplex-Hemin DNAzyme

Cu-TCPP Nanosheets-Sensitized Electrode for Simultaneous Determination of Hydroquinone and Catechol

Preparation of a nonenzymatic electrochemical sensor based on a g-C3N4/MWO4 (M: Cu, Mn, Co, Ni) composite for the determination of H2O2

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Preparation of a nonenzymatic electrochemical sensor based on a g-C₃N₄/MWO₄ (M: Cu, Mn, Co, Ni) composite for the determination of H₂O₂