Lei, Peng, Wu, Ni, Zhou, Ying, Dong, Chuan, Liu, Yang, and Shuang, Shaomin (2024) Cu/Zr Metal–Organic Frameworks with High Peroxidase-Like Activity for Sensitive Electrochemical and Colorimetric Dual-Mode Detection of Hydrogen Peroxide Released from Living Cells. ACS Applied Nano Materials. (In Press)

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Abstract

Hydrogen peroxide (H2O2) is closely associated with various diseases and is commonly used as a target for disease diagnosis and treatment, making research on H2O2 detection methods crucial. Compared to currently used single-mode detection methods, dual-mode detection offers self-validation and self-correction capabilities, which help to provide more accurate detection results. Herein, an electrochemical and colorimetric dual-mode sensing platform was developed to detect H2O2 based on copper/zirconium metal–organic framework (Cu/Zr-MOF) nanozymes with high peroxidase-like activity. Cu/Zr-MOF catalyzes the reduction of H2O2 to generate ·OH, which oxidizes colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into a blue product (oxTMB), and the color change can be recognized and measured using a smartphone application. Furthermore, Cu/Zr-MOF exhibits excellent electrocatalytic reduction activity toward H2O2. Electrochemistry demonstrated higher sensitivity with a detection limit as low as 21.3 nM, compared to colorimetry (0.11 μM). The effective combination of the two detection modes allows the sensing platform to exhibit high accuracy, selectivity, and reliability. The dual-mode sensing platform opens a pathway for the accurate and sensitive detection of intracellular and extracellular H2O2 and has a broad spectrum of applications in pathological research and disease diagnosis.

Item ID:	82494
Item Type:	Article (Research - C1)
ISSN:	2574-0970
Keywords:	dual-mode, electrochemistry, colorimetry, MOF nanozyme, hydrogen peroxide
Copyright Information:	© 2024 American Chemical Society.
Date Deposited:	19 Mar 2024 05:06
FoR Codes:	34 CHEMICAL SCIENCES > 3401 Analytical chemistry > 340103 Electroanalytical chemistry @ 100%
SEO Codes:	28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280105 Expanding knowledge in the chemical sciences @ 100%
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