Issue 2, 2025

A portable smartphone platform with FeNPs@g-C3N4 nano-enzyme for visual and on-site sensing of F and Al3+ in tea

Abstract

A portable platform for the visual determination of F and Al3+ was developed by combining FeNPs@g-C3N4 nano-enzyme and a smartphone. The FeNPs@g-C3N4 nano-enzyme with excellent peroxidase activity was synthesized through the in situ growth of Fe nanoparticles (FeNPs) on graphite-phase carbon nitride nanosheets (g-C3N4), which could catalyze H2O2 to oxidize TMB to blue oxide (oxTMB). The peroxidase activity of the FeNPs@g-C3N4 nano-enzyme could be inhibited by F, and then restored by Al3+ because of the coordination reaction between Fe3+/Al3+ and F. Furthermore, the solution color could be dynamically manipulated by changing the concentrations of F and Al3+. Under optimal conditions, the developed method gave low detection limits of 2.43 nM for F and 7.66 μM for Al3+. The cooperation of nano-enzyme and smartphone has greatly shortened the detection time and reduced the cost of detection, providing a new strategy for the on-site and convenient detection of F and Al3+ in tea, and showed significant application potential in food safety evaluation.

Graphical abstract: A portable smartphone platform with FeNPs@g-C3N4 nano-enzyme for visual and on-site sensing of F− and Al3+ in tea

Supplementary files

Article information

Article type
Paper
Submitted
14 Sep 2024
Accepted
18 Nov 2024
First published
28 Nov 2024

J. Anal. At. Spectrom., 2025,40, 402-410

A portable smartphone platform with FeNPs@g-C3N4 nano-enzyme for visual and on-site sensing of F and Al3+ in tea

Y. Wang, S. Gao, G. Yang, W. Zhu, Y. Lu, M. Tan, Y. Peng, H. Yang and C. Song, J. Anal. At. Spectrom., 2025, 40, 402 DOI: 10.1039/D4JA00338A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements