过氧化氢
过氧化物酶
电化学
双模
化学
金属
对偶(语法数字)
无机化学
核化学
酶
生物化学
有机化学
电极
物理化学
艺术
文学类
工程类
航空航天工程
作者
Lei Peng,Ni Wu,Ying Zhou,Chuan Dong,Yang Liu,Shaomin Shuang
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2024-03-11
标识
DOI:10.1021/acsanm.4c00321
摘要
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.
科研通智能强力驱动
Strongly Powered by AbleSci AI