Oxidative properties and utility of fabricated MnSiO 3 nanoparticles for colorimetric detection of iron (II) in water samples

Micro & nano letters

article

Tao Wang¹  Haoran Jiang¹  Qiang Bai¹  Hailian Xiao¹  Manhong Liu¹  Ning Sui¹ 

[1] College of Materials Science and Engineering, Qingdao University of Science and Technology

关键词: colorimetry;    electron diffraction;    X-ray diffraction;    oxidation;    X-ray photoelectron spectra;    chemical sensors;    precipitation;    nanosensors;    nanoparticles;    transmission electron microscopy;    enzymes;    catalysis;    iron;    manganese compounds;    chemical variables measurement;    catalysts;    absorption;    X-ray photoelectron spectroscopy;    oxidase-like enzyme activity;    oxidised TMB;    high oxidase-like activity;    colorimetric method;    spiked water samples;    nanoparticle fabrication;    colorimetric detection;    precipitation method;    transmission electron microscopy;    electron diffraction spectroscopy;    X-ray diffraction;    3;    3′;    5;    5′-tetramethylbenzidine;    catalysis;    wavelength 652.0 nm;    Fe;    MnSiO3;   

DOI  :  10.1049/mnl.2019.0543

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

MnSiO 3 nanoparticles (NPs) were prepared by precipitation method, their structure and composition were characterised by transmission electron microscopy, electron diffraction spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Due to the oxidase-like enzyme activity of MnSiO 3 , it can catalyse the substrate 3,3′,5,5′-tetramethylbenzidine (TMB) in acidic environment to form an oxidised TMB which has an absorption peak at 652 nm in the absence of hydrogen peroxide. When Fe 2+ was added to the assay, the oxidase-like activity of MnSiO 3 was inhibited, and the intensity of the absorption at 652 nm was reduced. Based on the high oxidase-like activity, a colorimetric method for Fe 2+ detection was established, it showed high selectivity and sensitivity. In the optimised conditions, the limit of detection was 0.5 μM with a linear range from 3 to 63 μM. Moreover, the method was applied to determine Fe 2+ in spiked water samples which gave satisfactory recoveries.

【 授权许可】

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