Hierarchical bimetallic nanoparticles embedded nitrogen-doped carbon derived from ZIF-67 composites for efficient electrochemical nitrite sensing

Jingwen Zhao; Xiaotian Guo; Wenzhuo Sun; Jing Wang; Jizhou Jiang; Huan Pang

doi:10.1007/s42823-024-00807-0

Hierarchical bimetallic nanoparticles embedded nitrogen-doped carbon derived from ZIF-67 composites for efficient electrochemical nitrite sensing

Carbon Letters
Abbr : Carbon Lett.
2025, 35(2), pp.635~643
DOI : 10.1007/s42823-024-00807-0
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General
Received : July 30, 2024
Accepted : September 3, 2024
Published : June 5, 2025

Jingwen Zhao ¹, Xiaotian Guo ¹, Wenzhuo Sun ¹, Jing Wang ¹, Jizhou Jiang ², Huan Pang ¹

¹Yangzhou University
²Wuhan Institute of Technology

Accredited

ABSTRACT

Nitrite is commonly found in various aspects of daily life, but its excessive intake poses health risks like blood oxygen transport impairment and cancer risks. Accurate detection of nitrite is crucial for preventing its potential harm and ensuring public health. In this work, Cu–Co bimetallic nanoparticles (NPs) incorporated nitrogen-doped carbon dodecahedron (Cu/Co@N–C/CNTs-X, where X denotes the carbonization temperatures) are synthesized by facile carbonization of CuO@ZIF-67 composites. Cu and Co NPs are uniformly embedded in the carbon dodecahedron decorated by carbon nanotubes (CNTs) without agglomeration. Combining the superior catalytic from Cu and Co NPs with the electrical conductivity and stability from the carbon frameworks, the Cu/Co@N–C/CNTs-600 composite as catalyst detected nitrite concentrations ranging from 1 to 5000 μM, with sensitivity values of 0.708 μA μM–1 cm–2, and a detection limit of 0.5 μM. Moreover, this sensor demonstrated notable selectivity, stability and reproducibility. The design of Cu/Co@N–C/CNTs-X catalysts prepared in this study can be used as an attractive alternative in the fields of food quality and environmental detection.

KEYWORDS

Bimetallic nanoparticles, Nitrogen-doped carbon, ZIF-67 composites, Electrochemical sensor, Nitrite

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Total Citation Counts(KCI+WOS) (8) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

* References for papers published after 2025 are currently being built.

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Carbon Letters 2025 KCI Impact Factor : 0.73 KCI-WoS Impact Factor : 6.26

Hierarchical bimetallic nanoparticles embedded nitrogen-doped carbon derived from ZIF-67 composites for efficient electrochemical nitrite sensing

ABSTRACT

KEYWORDS

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2026-07-09)

Total Citation Counts(KCI+WOS) (8) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

* References for papers published after 2025 are currently being built.

Carbon Letters 2025 KCI Impact Factor : 0.73 KCI-WoS Impact Factor : 6.26

Hierarchical bimetallic nanoparticles embedded nitrogen-doped carbon derived from ZIF-67 composites for efficient electrochemical nitrite sensing

ABSTRACT

KEYWORDS

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KCI Citation Counts (1)

WoS Citation Counts (7) This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2026-07-09)

Total Citation Counts(KCI+WOS) (8) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

REFERENCES (36) * References for papers published after 2025 are currently being built.

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This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2026-07-09)

* References for papers published after 2025 are currently being built.