Synergistic co-catalytic nanozyme system for highly efficient one-pot colorimetric sensing at neutral pH: Combining molybdenum trioxide and Fe (III)-Modified covalent triazine framework
文献类型： 外文期刊
第一作者： Xu, Jingyan
作者： Xu, Jingyan;Xiong, Yuhao;Xu, Jingyan;Tan, Hanying;Su, Linjing;Zhang, Zhi;Xiong, Yuhao;Ma, Xionghui
作者机构：
关键词： MoO 3 nanosheets; Fe(III)-Modified covalent triazine framework; Neutral pH enzyme-like activity; Colorimetric sensing
期刊名称：ANALYTICAL BIOCHEMISTRY （ 影响因子：2.9； 五年影响因子：3.2 ）
ISSN： 0003-2697
年卷期： 2024 年 685 卷
页码：
收录情况： SCI
摘要： This study investigates the co-catalytic capabilities of MoO3 nanosheets in enhancing the enzyme-like catalytic activity of a two-dimensional ultrathin Fe(III)-modified covalent triazine framework (Fe-CTF) under neutral pH conditions. The unique physicochemical surface properties and two-dimensional structures of Fe-CTF enable the direct immobilization of native enzymes (glucose oxidase (GOD) and xanthine oxidase (XOD)) through adsorption, eliminating the need for chemical processes. Efficient immobilization of the native enzymes within the Fe-CTF/GOD(XOD) hybrid is achieved through multipoint attachment involving various interactions. The Fe-CTF/MoO3 co-catalytic system exhibits enzyme-mimicking activity at neutral pH and, when combined with the high catalytic activity of the immobilized native enzymes, enables the development of a colorimetric method for glucose detection. This method demonstrates excellent facilitation, rapidity, sensitivity, and selectivity, with a linear detection range of 50-1000 mu M and a limit of detection of 8.8 mu M for glucose. Furthermore, a straight-forward one-pot colorimetric method is established for screening XOD inhibitors. The inhibitory potential of a crude extract derived from Chinese water chestnut peel on XOD activity is evaluated using this method. The findings of this study pave the way for the utilization of nanozyme/native enzyme hybrids in pH-neutral con-ditions for one-pot colorimetric sensing. This work contributes to the advancement of enzyme-based sensing technologies and holds promise for various applications in biosensing and biomedical research.
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