Jump to main content
Jump to site search

Issue 19, 2020
Previous Article Next Article

Fe–Ni metal–organic frameworks with prominent peroxidase-like activity for the colorimetric detection of Sn2+ ions

Author affiliations

Abstract

Fe–Ni-MOFs with different amounts of Fe are synthesized through a two-step template etching method. Kinetic analysis indicates that Fe–Ni-MOF exhibits prominent intrinsic peroxidase-like activity, which could catalytically oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to produce oxidized TMB (oxTMB) with a blue color. As a peroxidase-mimicking MOF, Fe–Ni-MOF with its efficient stable catalysis properties is demonstrated to allow a sensitive colorimetric assay for Sn2+ ions. The mechanism is explored, whereby Sn2+ ions could reduce the peroxidase-like activity of Fe–Ni-MOF based on a redox interaction, making the oxTMB color lighter and decreasing the absorbance intensity at 652 nm. The linear determination of the Sn2+ ion concentration using a UV-vis spectrometer ranges from 0.01 mM to 1.0 mM and from 1.0 mM to 4.0 mM. The presented Fe–Ni-MOF-based assay of Sn2+ ions was successfully applied to real water samples.

Graphical abstract: Fe–Ni metal–organic frameworks with prominent peroxidase-like activity for the colorimetric detection of Sn2+ ions

Back to tab navigation

Supplementary files

Article information


Submitted
21 Apr 2020
Accepted
16 Jul 2020
First published
17 Jul 2020

Analyst, 2020,145, 6349-6356
Article type
Paper

Fe–Ni metal–organic frameworks with prominent peroxidase-like activity for the colorimetric detection of Sn2+ ions

Y. Hu, C. Yue, J. Wang, Y. Zhang, W. Fang, J. Dang, Y. Wu, H. Zhao and Z. Li, Analyst, 2020, 145, 6349
DOI: 10.1039/D0AN00801J

Social activity

Search articles by author

Spotlight

Advertisements