Highly efficient determination of Mn2+ in Chinese liquor by using a novel electrochemical sensor based on TiO2-NH2@covalent organic framework nanocomposites

Yu, Liangyun; Sun, Liangju; Qi, Zeming; Zhang, Jingjing; Yang, Bairen; Huang, Mingquan; Zhou, Yawen; Xu, Bin; Shu, Yun

doi:10.1039/d3ay00222e

Cited by 8 publications

(4 citation statements)

References 38 publications

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“…COF DPTB was prepared by the aldehyde-amine Schiff-base condensation reaction of TAPB and DMTP as our previous work ( Yu et al, 2023 ). Specially, 85.0 mg DMTP and 105.0 mg TAPB were firstly dissolved in 45.0 mL mixed solution of 1, 4-dioxane, n-butanol and methanol (volume ratio of 4:4:1) for 30 min by ultrasound.…”

Section: Methodsmentioning

confidence: 99%

Rapid, simple, and simultaneous electrochemical determination of cadmium, copper, and lead in Baijiu using a novel covalent organic framework based nanocomposite

Yu,

Zhang,

et al. 2024

Front. Chem.

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It is of great significance to develop a simple and rapid electrochemical sensor for simultaneous determination of heavy metal ions (HMIs) in Baijiu by using new nanomaterials. Here, graphene (GR) was utilized to combine with covalent organic frameworks (COFs) that was synthesized via the aldehyde-amine condensation between 2, 5-dimethoxyterephthalaldehyde (DMTP) and 1, 3, 5-tris(4-aminophenyl) benzene (TAPB) to prepare a new GR/COFDPTB/GCE sensor for electrochemical sensing multiple HMIs. Compared with the glass carbon electrode (GCE), GR/GCE and COFDPTB/GCE, the developed sensor exhibited excellent electrochemical analysis ability for the simultaneous detection of Cd2+, Pb2+, and Cu2+ owing to the synergistically increased the specific surface area, the periodic porous network and plenty of effective binding sites, as well as the enhanced conductivity. Under the optimized experimental parameters, the proposed sensor showed good linearity range of 0.1–25 μM for Cd2+, and both 0.1–11 μM for Pb2+ and Cu2+ with the detection limits of Cd2+, Pb2+, and Cu2+ being 0.011 μM, 8.747 nM, and 6.373 nM, respectively. Besides, the designed sensor was successfully applied to the simultaneous detection of the three HMIs in Baijiu samples, suggesting its good practical application performance and a new method for the rapid detection of HMIs being expended.

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Section: Methodsmentioning

confidence: 99%

Rapid, simple, and simultaneous electrochemical determination of cadmium, copper, and lead in Baijiu using a novel covalent organic framework based nanocomposite

Yu,

Zhang,

et al. 2024

Front. Chem.

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Section: Combination Of Cofs and Tio2mentioning

confidence: 99%

“…In addition, the electrochemical response of the sensor was significantly improved due to the synergistic effect between TiO 2 and COF TATP . The TiO 2 -NH 2 @COF TATP -based sensor presented a broad linear response to Mn 2+ in range of 0.1−1.0 nM and 0.08−10 μM with LOD = 2.83 × 10 −11 M. 153 Xu and co-workers decorated the COF-316 on the surface of TiO 2 to form a Z-scheme heterojunction, which can act as a "filter amplifier" to conceal the intrinsic oxidative sites and increase the extrinsic reductive sites (Figure 19d). The prepared TiO 2 @COF-316 successfully reversed the selective response of TiO 2 from reductive analytes (ethanol and methanol) to oxidative analytes (NO 2 ).…”

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confidence: 99%

Covalent Organic Frameworks Meet Titanium Oxide

Xue,

Liu,

et al. 2024

ACS Nano

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In order to expand the applicability of materials and improve their performance, the combined use of different materials has increasingly been explored. Among these materials, inorganic−organic hybrid materials often exhibit properties superior to those of single materials. Covalent organic frameworks (COFs) are famous crystalline porous materials constructed by organic building blocks linked by covalent bonds. In recent years, the combination of COFs with other materials has shown interesting properties in diverse fields, and the composite materials of COFs and TiO 2 have been investigated more and more. These two outstanding materials are combined through covalent bonding, physical mixing, and other methods and exhibit excellent performance in various fields, including photocatalysis, electrocatalysis, sensors, separation, and energy storage and conversion. In this Review, the current preparation methods and applications of COF-TiO 2 hybrid materials are introduced in detail, and their future development and possible problems are discussed and prospected, which is of great significance for related research. It is believed that these interesting hybrid materials will show greater application value as research progresses.

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“…Therefore, detection and monitoring of manganese levels in living cells is important in understanding its roles in cellular processes as well as studying its potential roles in various diseases and disorders. Toward this goal, different approaches have been reported, including fluorescent sensors, − colorimetric sensors, , electrochemical sensors, magnetic resonance imaging (MRI), − and mass spectrometry . Among these approaches, fluorescent sensors stand out due to their advantages of rapid response, high sensitivity, and compatibility with biological systems, particularly in terms of subcellular resolution. − However, although fluorescent sensors have proven to be effective in detecting various metal ions, the development of Mn 2+ -specific fluorescent sensors has been limited.…”

Section: Introductionmentioning

confidence: 99%

Improving the Sensitivity of a Mn(II)-Specific DNAzyme for Cellular Imaging Sensor through Sequence Mutations

Fan,

2024

Anal. Chem.

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Detection of Mn 2+ in living cells is important in understanding the roles of Mn 2+ in cellular processes and investigating its potential implications in various diseases and disorders. Toward this goal, we have previously selected a Mn 2+specific 11-5 DNAzyme through an in vitro selection method and converted it into a fluorescence sensor for intracellular Mn 2+ sensing. Despite the progress, the nucleotides responsible for the activity are unclear, and the performance of the DNAzyme needs to be improved in order for more effective applications in biological systems. To address these issues, we herein report site-specific mutations within the catalytic domain of the selected 11-5 DNAzyme. As a result, we successfully identified a variant DNAzyme, designated as Mn5V, which exhibited a twofold increase in activity compared to the original 11-5 DNAzyme. Importantly, Mn5V DNAzyme maintained its high selectivity for Mn 2+ over other competing metal ions. Upon the addition of Mn 2+ , Mn5V DNAzyme exhibited a higher fluorescence signal within the tumor cells compared to that of the 11-5 DNAzyme. This study therefore provides a better understanding of how the DNAzyme functions and a more sensitive probe for investigating Mn 2+ in biological systems.

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Highly efficient determination of Mn²⁺ in Chinese liquor by using a novel electrochemical sensor based on TiO₂-NH₂@covalent organic framework nanocomposites

Abstract: This study developed an electrochemical sensor for Mn2+ assay in Baijiu based on TiO2-NH2@COFDPTB nanocomposite, which was synthesized via the controllable growth of COFDPTB onto the surface of TiO2-NH2 using the Schiff-base condensation reaction.

Cited by 8 publications

References 38 publications

Rapid, simple, and simultaneous electrochemical determination of cadmium, copper, and lead in Baijiu using a novel covalent organic framework based nanocomposite

Rapid, simple, and simultaneous electrochemical determination of cadmium, copper, and lead in Baijiu using a novel covalent organic framework based nanocomposite

Covalent Organic Frameworks Meet Titanium Oxide

Improving the Sensitivity of a Mn(II)-Specific DNAzyme for Cellular Imaging Sensor through Sequence Mutations

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