Self-deposited ultrasmall Ru nanoparticles on carbon nitride with high peroxidase-mimicking activity for the colorimetric detection of alkaline phosphatase

Ding, Zhenyu; Li, Zhe; Zhao, Xiaoxue; Miao, Yanrong; Yuan, Zhenfeng; Jiang, Yuanyuan; Lu, Yizhong

doi:10.1016/j.jcis.2022.11.001

Cited by 24 publications

(10 citation statements)

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“…As shown in Figure a, the results reveal that KCN-8 effectively oxidized TMB, OPD, and ABTS, leading to the appearance of characteristic absorption peaks at 652, 450, and 415 nm, respectively. These findings provide strong evidence for the remarkable peroxidase-like activity of KCN-8 . In view of the fact that TMB shows the best characteristic absorbance peak, it is used as the chromogenic substrate in the following experiments.…”

Section: Resultsmentioning

confidence: 66%

“…These findings provide strong evidence for the remarkable peroxidase-like activity of KCN-8. 56 In view of the fact that TMB shows the best characteristic absorbance peak, it is used as the chromogenic substrate in the following experiments. Individual systems without the presence of KCN-8 or H 2 O 2 showed almost no characteristic peak (Figure 5b), which further proves the peroxidase-like activity of KCN-8 and eliminates the interference of the oxidase-like activity.…”

Section: •−mentioning

confidence: 99%

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Potassium Intercalated into Carbon Nitride Nanosheets as Bifunctional Catalysts for the Simultaneous Photosynthesis and Detection of Hydrogen Peroxide

Li,

He,

Chu

et al. 2023

ACS Appl. Nano Mater.

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The photocatalytic production of hydrogen peroxide (H 2 O 2 ) could provide a green and safe approach for synthesizing H 2 O 2 on demand. However, the common offline methods for the quantitative monitoring of H 2 O 2 concentration are cost-ineffective and not reliable during the in situ photocatalytic process, which is necessary to understand the structure−activity relationship of photocatalysts for H 2 O 2 generation successfully. Herein, we demonstrated a simple and real-time simultaneous photocatalytic production and detection of H 2 O 2 by using potassium (K) ions intercalated into carbon nitride nanosheets (KCN-8). The high crystallinity and K intercalation could synergistically improve the photocatalytic performance of KCN-8. An H 2 O 2 production rate of 158.20 μM mg −1 h −1 was obtained under visible light (λ ≥ 420 nm), which is superior to that of most CN-based photocatalysts. Simultaneously, based on the inherent peroxidase-like property of KCN-8, the colorimetric detection platform of H 2 O 2 was constructed, achieving a precise quantitative detection of H 2 O 2 produced during photocatalysis. Finally, the preparation and detection of H 2 O 2 were realized by KCN-8 nanosheets. This paper not only provides a CN-based catalyst with high photocatalytic performance toward H 2 O 2 production but also demonstrates a cost-effective and real-time method for the quantitative concentration determination of H 2 O 2 .

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Section: Resultsmentioning

confidence: 66%

Section: •−mentioning

confidence: 99%

Potassium Intercalated into Carbon Nitride Nanosheets as Bifunctional Catalysts for the Simultaneous Photosynthesis and Detection of Hydrogen Peroxide

Li,

He,

Chu

et al. 2023

ACS Appl. Nano Mater.

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“…50 μL of an aqueous sample suspension (1 g/L) was combined with 20 μL of 3,3′,5,5′-tetramethyl benzidine (TMB, 50 mM, using dimethyl sulfoxide as solvent) and 2 mL of a CH 3 COOH/CH 3 COONa buffer solution (pH = 4.5). The light source was a 300 W xenon lamp with a UV cutoff filter (λ > 420 nm). , At various time intervals, UV–vis measurements (the absorbance around 650 nm) were used to analyze TMB oxidation. To determine the type of reactive oxygen species, identical tests with several types of scavengers were conducted.…”

Section: Methodsmentioning

confidence: 99%

Z-Scheme Heterojunction α-Fe₂O₃/Tubular g-C₃N₄ with C Defects for Photocatalytic Degradation of Microcystin-LR in Water: Generation and Effect of Critical Species ¹O₂

Zhong,

Ji,

Yang

et al. 2024

ACS Catal.

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Microcystin-LR (MC-LR) is susceptible to degradation by singlet oxygen ( 1 O 2 ) attack due to multiple unsaturated olefinic bond sites. In this study, the Z-scheme heterojunction α-Fe 2 O 3 /tubular g-C 3 N 4 with C defects (α-Fe 2 O 3 /TDCN) was synthesized via hydrothermal and cocalcination methods. The efficient generation of 1 O 2 was realized by enhancing the photogenerated carrier separation and oxygen adsorption capabilities and was used to investigate the degradation process and mechanism of MC-LR. The results show that the degradation rate of MC-LR can reach nearly 100% within 60 min under visible light irradiation, and α-Fe 2 O 3 /TDCN possesses good stability and environmental friendliness. The relationship between photocatalyst performance and 1 O 2 generation was analyzed by density functional theory (DFT) calculations. Based on probe experiments, LC−MS data, and DFT calculations, the mineralization process of MC-LR dominated by 1 O 2 was analyzed. This study provides a reference for addressing MC-LR pollution in eutrophic aquatic environments and the direction of specific control of MC-LR mineralization.

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“…Nanozymes, as one kind of nanomaterial which is artificially designed to simulate the function of natural enzymes, have aroused high attention for their unparalleled advantages, for example, high activity and stability, , low production costs, and easy modification. , Among them, peroxidase (POD) and oxidase (OXD)-mimic nanozymes have been most widely explored due to the widespread existence of these activities in many nanomaterials, such as transition metal-based, − precious metal-based, − and carbon-based materials. − Nevertheless, poor substrate selectivity hinders their widespread application. Nanozymes that use specific biomolecules as substrates are seldomly reported, , especially ascorbic acid oxidase (AAO) mimetic nanozymes with ascorbic acid (AA) as the substrate.…”

Section: Introductionmentioning

confidence: 99%

Natural Enzyme-Inspired Design of the Single-Atom Cu Nanozyme as Dual-Enzyme Mimics for Distinguishing Total Antioxidant Capacity and the Ascorbic Acid Level

Tao,

Jiang,

Chu

et al. 2024

Anal. Chem.

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Although various oxidase mimetic or peroxidase (POD) mimetic nanozymes have been extensively studied, their poor substrate selectivity significantly inhibits their practical applications. Nanozymes with specific biomolecules as substrates, especially ascorbic acid oxidase (AAO) mimetic nanozymes with ascorbic acid (AA) as a substrate, have scarcely been studied. Herein, inspired by the multi-Cu atom sites and the redox electron transfer pathway of Cu 2+ /Cu + in the natural AAO, atomically dispersed Cu sites immobilized on N-doped porous carbon (Cu-N/C) are artificially designed to simulate the function of natural AAO. Compared with their natural counterparts, the Cu-N/C catalysts exhibited higher catalytic efficiency and superior stability. Combined theoretical calculation and experimental characterizations reveal that the Cu-N/C nanozymes could catalyze the AA oxidation through a 2e − oxygen reduction pathway with H 2 O 2 as the product. Moreover, the Cu-N/C nanozymes also possess high POD activity. As a proof-of-concept application, Cu-N/C can simultaneously realize AA detection in fluorescent mode based on its AAO activity and total antioxidant capacity detection in colorimetric mode utilizing its POD activity.

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Self-deposited ultrasmall Ru nanoparticles on carbon nitride with high peroxidase-mimicking activity for the colorimetric detection of alkaline phosphatase

Cited by 24 publications

References 50 publications

Potassium Intercalated into Carbon Nitride Nanosheets as Bifunctional Catalysts for the Simultaneous Photosynthesis and Detection of Hydrogen Peroxide

Potassium Intercalated into Carbon Nitride Nanosheets as Bifunctional Catalysts for the Simultaneous Photosynthesis and Detection of Hydrogen Peroxide

Z-Scheme Heterojunction α-Fe₂O₃/Tubular g-C₃N₄ with C Defects for Photocatalytic Degradation of Microcystin-LR in Water: Generation and Effect of Critical Species ¹O₂

Natural Enzyme-Inspired Design of the Single-Atom Cu Nanozyme as Dual-Enzyme Mimics for Distinguishing Total Antioxidant Capacity and the Ascorbic Acid Level

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Self-deposited ultrasmall Ru nanoparticles on carbon nitride with high peroxidase-mimicking activity for the colorimetric detection of alkaline phosphatase

Cited by 24 publications

References 50 publications

Potassium Intercalated into Carbon Nitride Nanosheets as Bifunctional Catalysts for the Simultaneous Photosynthesis and Detection of Hydrogen Peroxide

Potassium Intercalated into Carbon Nitride Nanosheets as Bifunctional Catalysts for the Simultaneous Photosynthesis and Detection of Hydrogen Peroxide

Z-Scheme Heterojunction α-Fe2O3/Tubular g-C3N4 with C Defects for Photocatalytic Degradation of Microcystin-LR in Water: Generation and Effect of Critical Species 1O2

Natural Enzyme-Inspired Design of the Single-Atom Cu Nanozyme as Dual-Enzyme Mimics for Distinguishing Total Antioxidant Capacity and the Ascorbic Acid Level

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Z-Scheme Heterojunction α-Fe₂O₃/Tubular g-C₃N₄ with C Defects for Photocatalytic Degradation of Microcystin-LR in Water: Generation and Effect of Critical Species ¹O₂