Zero-valent iron nanomaterial Fe0@Fe2MnO4 for ultrasensitive electroanalysis of As(III): Fe0 influenced surficial redox potential

Meng Yang; Feng Xie; Shan-Shan Li; Chu-Hong Lin; Xing-Jiu Huang; Wen-Qing Liu

doi:10.1039/D0CC07256G

Zero-valent iron nanomaterial Fe⁰@Fe₂MnO₄ for ultrasensitive electroanalysis of As(iii): Fe⁰ influenced surficial redox potential†

Meng Yang,^ab Feng Xie,^b Shan-Shan Li,*^c Chu-Hong Lin,

*^a Xing-Jiu Huang

*^a and Wen-Qing Liu^b

Author affiliations

* Corresponding authors

^a Key Laboratory of Environmental Optics and Technology, and Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
E-mail: xingjiuhuang@iim.ac.cn, chlin@iim.ac.cn

^b Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

^c Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Department of Materials Science and Engineering, Huaibei Normal University, Huaibei 235000, China
E-mail: sa157002@mail.ustc.edu.cn

Abstract

A novel zero-valent iron nanomaterial (Fe⁰@Fe₂MnO₄) was synthesized and achieved an ultrasensitive electrochemical detection of As(III). It was found that the enhanced sensitivity is attributed to the surficial catalytic redox couple Fe(II)/Fe(III) induced by Fe⁰ of Fe⁰@Fe₂MnO₄. Besides, the catalytic kinetics was modelled and simulated, and the strong influence of the oxidation potential of the catalytic redox species on sensitivity was revealed. By tailoring the surficial atomic and electronic structures of the material, the redox potential can be altered, which can be used for controlling the electro-sensitivity and selectivity in electroanalysis.

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Article information

DOI: https://doi.org/10.1039/D0CC07256G
Article type: Communication
Submitted: 03 Nov 2020
Accepted: 23 Dec 2020
First published: 23 Dec 2020

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Chem. Commun., 2021,57, 1324-1327

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Zero-valent iron nanomaterial Fe⁰@Fe₂MnO₄ for ultrasensitive electroanalysis of As(III): Fe⁰ influenced surficial redox potential

M. Yang, F. Xie, S. Li, C. Lin, X. Huang and W. Liu, Chem. Commun., 2021, 57, 1324 DOI: 10.1039/D0CC07256G

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Chemical Communications

Zero-valent iron nanomaterial Fe⁰@Fe₂MnO₄ for ultrasensitive electroanalysis of As(iii): Fe⁰ influenced surficial redox potential†

Abstract

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Zero-valent iron nanomaterial Fe⁰@Fe₂MnO₄ for ultrasensitive electroanalysis of As(III): Fe⁰ influenced surficial redox potential

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