Saad Benhaiba, Anas El Attar, Ouissal Salhi, Badr Bouljoihel, Charafeddine Jama, Soad Youssefi, Amine Ezzahi and Mama El Rhazi
{"title":"Facile and highly sensitive nitrate ion detection via an electrochemical sensor based on a poly 1,8-diaminonaphthalene and copper oxide particle film†","authors":"Saad Benhaiba, Anas El Attar, Ouissal Salhi, Badr Bouljoihel, Charafeddine Jama, Soad Youssefi, Amine Ezzahi and Mama El Rhazi","doi":"10.1039/D5AY00655D","DOIUrl":null,"url":null,"abstract":"<p >Excessive nitrate accumulation in soil and water has become a critical environmental concern, threatening ecosystems and public health. This drives the need for designing new electrochemical nitrate sensors based on novel electroactive materials. In this work, we synthesized a hybrid film material composed of poly 1,8-diaminonaphthalene and copper oxide particles electrodeposited on the surface of a carbon paste electrode (Cu<small><sub>2</sub></small>O–CuO/poly 1,8-DAN/CPE). The electrodeposition of the polymer was conducted in galvanostatic mode at a positive current, followed by the electrodeposition of copper in potentiostatic mode at a negative potential. The polymeric film obtained through this facile electropolymerization method showed a uniform dispersion of copper particles and could improve the mechanical stability of the fabricated sensors, thereby leading to a low detection limit of nitrate ions. The Cu<small><sub>2</sub></small>O–CuO/poly 1,8-DAN/CPE was prepared in just 3 min in both the galvanostatic and potentiostatic mode. The developed sensor exhibited a good electrochemical performance for nitrate ions, with a linear range from 2 to 200 μM, strong stability, high reproducibility, and a low detection limit of 0.5 μM. This work revealed that the deposition of polymer can be applied as a promising material in new applications, such as water denitrification.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 28","pages":" 5868-5885"},"PeriodicalIF":2.6000,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Analytical Methods","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/ay/d5ay00655d","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Excessive nitrate accumulation in soil and water has become a critical environmental concern, threatening ecosystems and public health. This drives the need for designing new electrochemical nitrate sensors based on novel electroactive materials. In this work, we synthesized a hybrid film material composed of poly 1,8-diaminonaphthalene and copper oxide particles electrodeposited on the surface of a carbon paste electrode (Cu2O–CuO/poly 1,8-DAN/CPE). The electrodeposition of the polymer was conducted in galvanostatic mode at a positive current, followed by the electrodeposition of copper in potentiostatic mode at a negative potential. The polymeric film obtained through this facile electropolymerization method showed a uniform dispersion of copper particles and could improve the mechanical stability of the fabricated sensors, thereby leading to a low detection limit of nitrate ions. The Cu2O–CuO/poly 1,8-DAN/CPE was prepared in just 3 min in both the galvanostatic and potentiostatic mode. The developed sensor exhibited a good electrochemical performance for nitrate ions, with a linear range from 2 to 200 μM, strong stability, high reproducibility, and a low detection limit of 0.5 μM. This work revealed that the deposition of polymer can be applied as a promising material in new applications, such as water denitrification.