Metal-organic framework-derived hierarchical flower-like DyCo-layered double hydroxide amalgamated nitrogen-doped graphene for diphenylamine detection in fruit samples: Theoretical density functional theory interpretation

Kubendhiran, S. and Prasanna, S. B. and Krishnegowda, H. M. and Kongvarhodom, C. and Yougbare, S. and Chen, H. M. and Wu, Y. F. and Lin, L. Y. (2025) Metal-organic framework-derived hierarchical flower-like DyCo-layered double hydroxide amalgamated nitrogen-doped graphene for diphenylamine detection in fruit samples: Theoretical density functional theory interpretation. Sensors and Actuators: B. Chemical, 423. ISSN 0925-4005

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Abstract

Diphenylamine (DPA) is an environmental pollutant that can be potentially toxic. As a result, it is crucial to use basic and affordable analytical techniques to detect DPA. Electrochemical detection of DPA is a cost-effective and simple method. Modifying the electrodes with nanomaterials can enhance the electrochemical characteristics and sensitivity of the sensor. Herein, metal-organic framework (MOF) derived dysprosium cobalt-layered double hydroxide integrated nitrogen-doped graphene (DyCo-LDH/NG) is reported for the fabrication of the DPA sensing platform. The electrochemical oxidation of DPA is enhanced by the exceptional electrocatalytic activity and electron transfer properties of the DyCo-LDH/NG nanocomposite. Interestingly, the glassy carbon electrode (GCE) modified with DyCo-LDH/NG nanocomposite demonstrates a large linear detection range (0.05–470 μM) and a low limit of detection (0.012 μM). The density functional theory (DFT) study is employed to examine the energy levels and electron transfer sites of DPA during the electro-oxidation process. Furthermore, the practical efficiency test of the developed DPA sensor demonstrates a substantial recovery in fruit samples.

Item Type:	Article
Uncontrolled Keywords:	Density functional theory,Diphenylamine,Fruit samples,Layered double hydroxide,Nitrogen-doped graphene, Rare earth metal
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	Ms Varalakshmi
Date Deposited:	28 Oct 2025 10:13
Last Modified:	28 Oct 2025 10:13
URI:	http://eprints.uni-mysore.ac.in/id/eprint/17876

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