Porphyrin modified ZnCo2O4 nanospheres as the excellent peroxidase/oxidase dual nanozymes for colorimetric sensing of cholesterol

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-11-01 DOI:10.1016/j.colsurfa.2024.135685

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引用次数: 0

Abstract

5,10,15,20-Tetrakis(4-carboxyl phenyl)porphyrin (H₂TCPP) modified ZnCo₂O₄ nanospheres (H₂TCPP-ZnCo₂O₄) were prepared by a two-step hydrothermal method. Compared with pure ZnCo₂O₄, H₂TCPP-ZnCo₂O₄ possessed higher peroxidase-like activity and fast catalyze the chromogenic substrate 3,3,5,5-tetramethylbenzidine (TMB) into oxTMB by H₂O₂ with a blue change. The catalytic behaviors of H₂TCPP-ZnCo₂O₄ is consistent with the Michaelis–Menten equation. Several techniques including electrochemical, fluorescent probes and capture agents were used to investigate the catalytic mechanism, which was identified as electron transfer and superoxide radical (•O₂⁻), due to the synergetic effect between porphyrin molecules and ZnCo₂O₄. Based on the nanoperoxidase activity of H₂TCPP-ZnCo₂O_4, a facile colorimetric sensing platforms was designed for the determination of H₂O₂ and cholesterol. The linear range for H₂O₂ determination is 100–200 μM, with a detection limit of 76.297 μM as well as cholesterol is 100–900 μM, with a detection limit of 40.027 μM

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卟啉修饰的 ZnCo2O4 纳米球是用于胆固醇比色传感的优异过氧化物酶/氧化酶双纳米酶

采用两步水热法制备了 5,10,15,20-四（4-羧基苯基）卟啉（H2TCPP）修饰的 ZnCo2O4 纳米球（H2TCPP-ZnCo2O4）。与纯 ZnCo2O4 相比，H2TCPP-ZnCo2O4 具有更高的过氧化物酶样活性，能快速催化 H2O2 将发色底物 3,3,5,5-四甲基联苯胺（TMB）转化为 oxTMB，并呈现蓝色变化。H2TCPP-ZnCo2O4 的催化行为符合 Michaelis-Menten 方程。研究人员采用电化学、荧光探针和捕获剂等多种技术研究了催化机理，发现由于卟啉分子和 ZnCo2O4 之间的协同效应，催化机理为电子转移和超氧自由基（-O2-）。基于 H2TCPP-ZnCo2O4 的纳米过氧化物酶活性，设计了一种用于测定 H2O2 和胆固醇的简便比色传感平台。H2O2 的线性范围为 100-200 μM，检出限为 76.297 μM；胆固醇的线性范围为 100-900 μM，检出限为 40.027 μM。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.