Heteroatom-doped graphene supported cerium oxide nanorods for sensitive diphenylamine detection
Journal
Microchemical Journal
Journal Volume
224
Start Page
117920
ISSN
0026265X
Date Issued
2026-05
Author(s)
Alagarsamy, Saranvignesh
Ramachandran, Balaji
Karuppiah, Chelladurai
Hong, Pei-Xuan
Kumar, Santosh
Abstract
In this study, an electrochemical sensor based on CeO₂ nanorods decorated nitrogen and boron co-doped reduced graphene oxide (NB-rGO) was developed for the sensitive detection of diphenylamine (DPA). The CeO2 nanorods were uniformly anchored onto NB-rGO sheets through a simple and rapid ultrasonication method. The electrochemical behaviour of the fabricated CeO2/NB-rGO modified glassy carbon electrode (GCE) was investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. The sensor exhibited outstanding electrocatalytic activity toward DPA oxidation, enabling its effective detection. Under optimized conditions, the sensor demonstrated high sensitivity with a low detection limit of 0.0039 μM and a wide linear response range from 0.01 to 141.5 μM. Furthermore, the sensor displayed excellent stability over extended storage periods. The practical applicability of the developed sensor was validated through successful detection of DPA in real and biological samples. Additionally, the sensor showed remarkable repeatability and reproducibility, highlighting its potential for practical analytical applications.
Subjects
Cerium oxide
Diphenylamine
Electrochemical sensors
Graphene
Hydrothermal
Nanocomposite
Publisher
Elsevier Inc.
Type
journal article