ZIF-67 on graphitic platforms: Carbon-based synergy for trace-level metol detection
Journal
Journal of Environmental Chemical Engineering
Journal Volume
13
Journal Issue
5
Start Page
119125
ISSN
22133437
Date Issued
2025-10
Author(s)
Annadurai, Bharathi Hemarani
Ragumoorthy, Chandini
Chen, Shen-Ming
Vengudusamy, Renganathan
Abstract
Metal-organic frameworks (MOFs), renowned for their high surface area, tunable porosity, and modular chemistry, have emerged as promising candidates for chemical sensing applications. Among them, zeolitic imidazolate frameworks (ZIFs), particularly ZIF-67 (Z-67), combine structural robustness with redox activity, making them suitable for electrochemical platforms. However, their limited conductivity necessitates integration with conductive carbon materials such as multi-walled carbon nanotubes (MWCNTs), graphitic carbon nitride (g-CN), and graphene oxide (GOx). In this study, Z-67-based composites were explored for detecting metol (MET), an environmentally persistent and toxic aquatic compound. Three materials-Z-67@MWCNT, Z-67@g-CN, and Z-67@GOx-were evaluated via CV and DPV. Z-67@MWCNT exhibited the best performance, achieving a low detection limit of 0.007 μM, LOQ of 0.235 μM, and a wide linear range (0.1–800.1 μM). It also showed excellent repeatability (RSD = 0.26 %), reproducibility (0.39 %), and long-term stability (28 days, RSD = 0.68 %), with high recovery rates (99.4–101.2 %) in pond, tap, and river water samples.
Subjects
Carbon platforms
Composites
Metol detection
Water samples
SDGs
Publisher
Elsevier Ltd
Type
journal article