Electrodeposition of Pd-Pt Nanocomposites on Porous GaN for Electrochemical Nitrite Sensing
In recent years, nitrite pollution has become a subject of great concern for human lives, involving a number of fields, such as environment, food industry and biological process. However, the effective detection of nitrite is an instant demand as well as an unprecedented challenge. Here, a novel nit...
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doaj-074e58eb61f64d19b7265a89d703bbd52020-11-24T23:56:42ZengMDPI AGSensors1424-82202019-01-0119360610.3390/s19030606s19030606Electrodeposition of Pd-Pt Nanocomposites on Porous GaN for Electrochemical Nitrite SensingRui Xi0Shao-Hui Zhang1Long Zhang2Chao Wang3Lu-Jia Wang4Jing-Hui Yan5Ge-Bo Pan6College of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSuzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, ChinaSuzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, ChinaSuzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, ChinaSuzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, ChinaCollege of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSuzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, ChinaIn recent years, nitrite pollution has become a subject of great concern for human lives, involving a number of fields, such as environment, food industry and biological process. However, the effective detection of nitrite is an instant demand as well as an unprecedented challenge. Here, a novel nitrite sensor was fabricated by electrochemical deposition of palladium and platinum (Pd-Pt) nanocomposites on porous gallium nitride (PGaN). The obtained Pd-Pt/PGaN sensor provides abundant electrocatalytic sites, endowing it with excellent performances for nitrite detection. The sensor also shows a low detection limit of 0.95 µM, superior linear ampere response and high sensitivity (150 µA/mM for 1 to 300 µM and 73 µA/mM for 300 to 3000 µM) for nitrite. In addition, the Pd-Pt/PGaN sensor was applied and evaluated in the determination of nitrite from the real environmental samples. The experimental results demonstrate that the sensor has good reproducibility and long-term stability. It provides a practical way for rapidly and effectively monitoring nitrite content in the practical application.https://www.mdpi.com/1424-8220/19/3/606porous GaNelectrodepositionPd-Pt nanocompositesnitrite detection |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Rui Xi Shao-Hui Zhang Long Zhang Chao Wang Lu-Jia Wang Jing-Hui Yan Ge-Bo Pan |
spellingShingle |
Rui Xi Shao-Hui Zhang Long Zhang Chao Wang Lu-Jia Wang Jing-Hui Yan Ge-Bo Pan Electrodeposition of Pd-Pt Nanocomposites on Porous GaN for Electrochemical Nitrite Sensing Sensors porous GaN electrodeposition Pd-Pt nanocomposites nitrite detection |
author_facet |
Rui Xi Shao-Hui Zhang Long Zhang Chao Wang Lu-Jia Wang Jing-Hui Yan Ge-Bo Pan |
author_sort |
Rui Xi |
title |
Electrodeposition of Pd-Pt Nanocomposites on Porous GaN for Electrochemical Nitrite Sensing |
title_short |
Electrodeposition of Pd-Pt Nanocomposites on Porous GaN for Electrochemical Nitrite Sensing |
title_full |
Electrodeposition of Pd-Pt Nanocomposites on Porous GaN for Electrochemical Nitrite Sensing |
title_fullStr |
Electrodeposition of Pd-Pt Nanocomposites on Porous GaN for Electrochemical Nitrite Sensing |
title_full_unstemmed |
Electrodeposition of Pd-Pt Nanocomposites on Porous GaN for Electrochemical Nitrite Sensing |
title_sort |
electrodeposition of pd-pt nanocomposites on porous gan for electrochemical nitrite sensing |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2019-01-01 |
description |
In recent years, nitrite pollution has become a subject of great concern for human lives, involving a number of fields, such as environment, food industry and biological process. However, the effective detection of nitrite is an instant demand as well as an unprecedented challenge. Here, a novel nitrite sensor was fabricated by electrochemical deposition of palladium and platinum (Pd-Pt) nanocomposites on porous gallium nitride (PGaN). The obtained Pd-Pt/PGaN sensor provides abundant electrocatalytic sites, endowing it with excellent performances for nitrite detection. The sensor also shows a low detection limit of 0.95 µM, superior linear ampere response and high sensitivity (150 µA/mM for 1 to 300 µM and 73 µA/mM for 300 to 3000 µM) for nitrite. In addition, the Pd-Pt/PGaN sensor was applied and evaluated in the determination of nitrite from the real environmental samples. The experimental results demonstrate that the sensor has good reproducibility and long-term stability. It provides a practical way for rapidly and effectively monitoring nitrite content in the practical application. |
topic |
porous GaN electrodeposition Pd-Pt nanocomposites nitrite detection |
url |
https://www.mdpi.com/1424-8220/19/3/606 |
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