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Micromachines
Volume 15
Issue 4
10.3390/mi15040487
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Article

Nitrate Sensor with a Wide Detection Range and High Stability Based on a Cu-Modified Boron-Doped Diamond Electrode

by
Shengnan Wei
1,2,
Danlin Xiao
1,2,
Yang Li
1,* and
Chao Bian
1,*
1
State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China
2
School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
*
Authors to whom correspondence should be addressed.
Micromachines 2024, 15(4), 487; https://doi.org/10.3390/mi15040487
Submission received: 18 March 2024 / Revised: 23 March 2024 / Accepted: 25 March 2024 / Published: 1 April 2024
(This article belongs to the Special Issue Exploration and Application of Micro-Devices/Sensors in Analytical Chemistry)
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Abstract

This paper describes an electrochemical sensor based on a Cu-modified boron-doped diamond (BDD) electrode for the detection of nitrate-contaminated water. The sensor utilizes the catalytic effect of copper on nitrate and the stability of the BDD electrode. By optimizing the electrolyte system, the linear detection range was expanded, allowing the sensor to detect highly concentrated nitrate samples up to 100 mg/L with a low detection limit of 0.065 mg/L. Additionally, the stability of the sensor was improved. The relative standard deviation of the current responses during 25 consecutive tests was only 1.03%. The wide detection range and high stability of the sensor makes it suitable for field applications and the on-site monitoring of nitrate-contaminated waters.
Keywords: electrochemical sensor; boron-doped diamond electrode; nitrate determination; Cu-modified; water pollution monitoring electrochemical sensor; boron-doped diamond electrode; nitrate determination; Cu-modified; water pollution monitoring

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MDPI and ACS Style

Wei, S.; Xiao, D.; Li, Y.; Bian, C. Nitrate Sensor with a Wide Detection Range and High Stability Based on a Cu-Modified Boron-Doped Diamond Electrode. Micromachines 2024, 15, 487. https://doi.org/10.3390/mi15040487

AMA Style

Wei S, Xiao D, Li Y, Bian C. Nitrate Sensor with a Wide Detection Range and High Stability Based on a Cu-Modified Boron-Doped Diamond Electrode. Micromachines. 2024; 15(4):487. https://doi.org/10.3390/mi15040487

Chicago/Turabian Style

Wei, Shengnan, Danlin Xiao, Yang Li, and Chao Bian. 2024. "Nitrate Sensor with a Wide Detection Range and High Stability Based on a Cu-Modified Boron-Doped Diamond Electrode" Micromachines 15, no. 4: 487. https://doi.org/10.3390/mi15040487

APA Style

Wei, S., Xiao, D., Li, Y., & Bian, C. (2024). Nitrate Sensor with a Wide Detection Range and High Stability Based on a Cu-Modified Boron-Doped Diamond Electrode. Micromachines, 15(4), 487. https://doi.org/10.3390/mi15040487

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