Issue 24, 2022

A novel electrochemical sensor based on AuPd/UiO-66-NH2/GN composites for sensitive dopamine detection

Abstract

Metal–organic frameworks (MOFs) have emerged as interesting nanomaterials owing to their large surface area, high porosity, tunable pore architecture and easy functionalization. However, an inferior electrical conductivity hinders their application in electrochemical sensing. In this paper, gold–palladium alloy/UiO-66-NH2/graphene (AuPd/UiO-66-NH2/GN) composites were synthesized by loading alloys on the surfaces of MOFs and then attaching them to the graphene surface. The addition of metal nanoparticles and graphene enhanced the electron transfer ability of MOFs. Then, composites were used to modify a glassy carbon electrode (GCE) to construct a sensitive dopamine (DA) electrochemical sensor. The developed sensor manifested two linear relationships in lower concentration ranges and in higher concentration ranges with a 0.21 × 10−6 mol L−1 low detection limit (3σ/k) under optimal conditions. The results certified that the constructed sensor had high selectivity, excellent reproducibility and good stability, and had been used successfully for DA detection in actual human serum samples.

Graphical abstract: A novel electrochemical sensor based on AuPd/UiO-66-NH2/GN composites for sensitive dopamine detection

Article information

Article type
Paper
Submitted
23 صفر 1444
Accepted
24 ربيع الأول 1444
First published
01 ربيع الثاني 1444

Analyst, 2022,147, 5655-5662

A novel electrochemical sensor based on AuPd/UiO-66-NH2/GN composites for sensitive dopamine detection

Y. Zhou, R. Li, G. Zhang, Y. Zhang, C. Zhang and S. Shuang, Analyst, 2022, 147, 5655 DOI: 10.1039/D2AN01538B

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