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Research Article

In situ decorating the surface and interlayer of montmorillonite with Co0.5Ni0.5Fe2O4 nanoparticles: A sustainable, biocompatible colorimetric platform for H2O2 and acetylcholine

Xixi Zhu1Hongyu Li1Tao Wu1Hui Zhao1Kaili Wu2Wenjing Xu3Fengjuan Qin3Wenxing Chen3( )Jinlong Zheng2( )Qingyun Liu1( )
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Beijing Advanced Innovation Center for Materials Genome Engineering, Shunde Graduate School, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
Energy & Catalysis Center, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
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Graphical Abstract

A facile and efficient biosensor for acetylcholine (ACh) was established based on the proxidase-like activity of Co0.5Ni0.5Fe2O4-MMT originated from its catalytic decomposition of H2O2 into ·OH and ·O2.

Abstract

Originated from nature and used for nature is a way of sustainable development. In this work, montmorillonite (MMT), a natural two-dimensional (2D) layered mineral, the surface and interlayer of which were nano-decorated by chemical synthesis technique was applied in biological detection field. Magnetic ferrite (Co0.5Ni0.5Fe2O4) was anchored on the surface and intercalated in the interlayer of montmorillonite, which served as a competitive candidate of enzyme mimics. Cytotoxicity test toward HUVEC and Hela cells verified the good biocompatibility of Co0.5Ni0.5Fe2O4-MMT, guaranteeing its safety in biological applications. Based on the peroxidase-like activity of Co0.5Ni0.5Fe2O4-MMT, a colorimetric sensing platform for H2O2 was established by a facile mix-and-detect approach with the detection limit of 0.565 μM (3σ/slope). It was implied that the peroxidase-like activity of Co0.5Ni0.5Fe2O4-MMT was originated from generation of ·OH and ·O2 produced from catalytic decomposition process of H2O2. Coupled with cascaded catalytic reactions of ACh, a facile and efficient sensing platform for ACh with satisfactory anti-interference ability was established. Thus, all these remarkable features highlighted the superiority of Co0.5Ni0.5Fe2O4-MMT, and endowed it with a powerful competitiveness in the fields of environmental assessing, biosensing, and disease monitoring.

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Cite this article:
Zhu X, Li H, Wu T, et al. In situ decorating the surface and interlayer of montmorillonite with Co0.5Ni0.5Fe2O4 nanoparticles: A sustainable, biocompatible colorimetric platform for H2O2 and acetylcholine. Nano Research, 2022, 15(10): 9319-9326. https://doi.org/10.1007/s12274-022-4594-x
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Received: 29 March 2022
Revised: 17 May 2022
Accepted: 28 May 2022
Published: 24 June 2022
© Tsinghua University Press 2022
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