Recent advances in the development and analytical applications of oxidase-like nanozymes

TrAC Trends in Analytical Chemistry, Journal Year: 2023, Volume and Issue: 166, P. 117220 - 117220

Published: Aug. 3, 2023

Language: Английский

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Covalent organic frameworks (COFs)-based biosensors for the assay of disease biomarkers with clinical applications

Biosensors and Bioelectronics, Journal Year: 2022, Volume and Issue: 217, P. 114668 - 114668

Published: Aug. 31, 2022

Language: Английский

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Research progress of nanozymes in colorimetric biosensing: Classification, activity and application

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 487, P. 150612 - 150612

Published: March 21, 2024

Language: Английский

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DNAzyme-Derived Aptamer Reversely Regulates the Two Types of Enzymatic Activities of Covalent–Organic Frameworks for the Colorimetric Analysis of Uranium

Analytical Chemistry, Journal Year: 2023, Volume and Issue: 95(10), P. 4703 - 4711

Published: March 1, 2023

Nanozymes are nanomaterials with enzyme-mimetic activity. It is known that DNA can interact various nanozymes in different ways, enhancing or inhibiting the activity of nanozymes, which be used to develop biosensors. In this work, we synthesized a photosensitive covalent–organic framework (Tph-BT) as nanozyme, and its oxidase peroxidase activities could reversely regulated by surface modification single-stranded (ssDNA) for colorimetric detection UO22+. Tph-BT exhibits excellent weak activity, it surprising find UO22+-specific aptamer significantly inhibit while greatly The present UO22+ interacts form secondary structures detaches from Tph-BT, thereby restoring enzymatic Tph-BT. Based on reversed regulation effects two types novel "off-on" "on-off" sensing platform constructed analysis This research demonstrates ssDNA effectively regulate single COFs achieve sensitive selective radionuclides naked eye.

Language: Английский

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Metal-Free Highly Stable and Crystalline Covalent Organic Nanosheet for Visible-Light-Driven Selective Solar Fuel Production in Aqueous Medium

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(9), P. 5926 - 5937

Published: April 17, 2023

Conversion of CO2 into solar fuels via artificial photosynthesis is one the most promising and sustainable approaches to mitigate global warming worldwide energy shortage. Covalent organic frameworks (COFs) exhibit well-defined arrangements building blocks, tunable porosity, high thermal chemical stability in harsh conditions. The band gaps COFs by suitably introducing chromophoric light-harvesting units make them a unique class metal-free heterogeneous photocatalysts for successful conversion fuel. In this work, we report simple, efficient, low-cost 2D COF (TTA-Tz) composed 1,3,5-tris-(4-aminophenyl)triazine (TTA) 4,4′-(thiazolo[5,4-d]thiazole-2,5-diyl)dibenzaldehyde (Tz) photocatalytic reduction. 2D-layered exfoliated ultrathin covalent nanosheets (CONs), which shows visible-light-driven photoreduction CO (yield = 2.8 mmol g–1, rate 82 μmol h–1 selectivity >99%) aqueous medium without an external sacrificial electron donor. Interestingly, mixed solvent system, evolution (163 g–1 h–1) found double than case with 99% selectivity. By both BNAH TEA as donors, significant amount CH4 (499 g–1) produced (310 further enhanced. mechanistic insight reduction studied DFT-based theoretical calculation, supported situ diffuse reflectance spectroscopy study.

Language: Английский

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Fluorescence/Colorimetry/Smartphone Triple-Mode Sensing of Dopamine by a COF-Based Peroxidase-Mimic Platform

Analytical Chemistry, Journal Year: 2022, Volume and Issue: 94(41), P. 14419 - 14425

Published: Oct. 4, 2022

Simple and accurate monitoring of urinary dopamine (DA) concentration is significant, which helpful for the assessment or exclusion catecholamine-producing tumors, such as pheochromocytoma paraganglioma. Herein, a fluorescence/colorimetry/smartphone triple-mode sensing platform DA determination was constructed using copper ion (Cu2+)-modified hydrazone-linked covalent organic frameworks (Cu-BTA-COF). Cu-BTA-COF with 21.67 wt % content exhibited peroxidase-mimic activity. After adding H2O2 1,3-dihydroxynaphthalene, can sensitively selectively detect in three modes consistent results. In modes, linear ranges were 1–10, 0.2–40, 1–10 μM, related detection limits 7.2, 8.6, 23 nM, respectively. Moreover, be explored human urine samples satisfactory recoveries (97.6–100.4%) all suggesting potential practical application urine.

Language: Английский

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Dual-activation interfacial polymerization based anionic covalent organic framework nanofiltration membrane for high-flux dye separation

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 456, P. 141008 - 141008

Published: Dec. 19, 2022

Language: Английский

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Covalent organic framework-loaded silver nanoparticles as robust mimetic oxidase for highly sensitive and selective colorimetric detection of mercury in blood

Journal of Materials Chemistry B, Journal Year: 2022, Volume and Issue: 10(48), P. 10075 - 10082

Published: Jan. 1, 2022

Silver-deposited COFs were used as the oxidase mimics for catalysis-based colorimetric detection of Hg 2+ ions.

Language: Английский

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Smartphone flashlight-triggered covalent organic framework nanozyme activity: A universal scheme for visual point-of-care testing

Sensors and Actuators B Chemical, Journal Year: 2023, Volume and Issue: 381, P. 133422 - 133422

Published: Jan. 23, 2023

Language: Английский

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Rational design of D− π − A− π − D porous organic polymer with polarized π for photocatalytic aerobic oxidation

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 334, P. 122847 - 122847

Published: May 4, 2023

Language: Английский

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