Exploiting Laser-Induced Graphene Composites as Substrates for Copper-Mediated Nitrate Reduction

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The development of a nanostructured copper–laser-induced graphene (LIG) composite that can catalyze the reduction of nitrate is described. The system was characterized using a range of surface analytical methods (SEM, Raman, DekTak profilometry). The electrochemical performance of the copper mesh in reducing nitrate was investigated, the nature of the catalytic response was elucidated, and the influence of potential interferences was critically appraised. The adaptation of the system as the basis of an electrochemical sensor for nitrate was assessed, which displayed a limit of detection of 4.7 μM nitrate. The analytical applicability in authentic media was evaluated through the analysis of two surface water samples and validated by standard spectroscopic (nitrate reductase–Griess methods). The LIG substrate offers a simple, scalable route towards the reduction of nitrate with a construction simplicity and sensitivity that is competitive with much more complex nanomaterials.
Original languageEnglish
Article number397
Pages (from-to)1-13
Number of pages13
JournalJournal of Composites Science
Issue number9
Early online date19 Sept 2023
Publication statusPublished online - 19 Sept 2023

Bibliographical note

Funding Information:
This research was funded by the Department of the Economy, Northern Ireland.

Publisher Copyright:
© 2023 by the authors.


  • Laser induced graphene
  • Nitrate
  • Nitrite
  • Sensor
  • Electrode
  • Copper
  • Electrocatalysis
  • Pollution
  • LIG
  • nitrate
  • laser-induced graphene
  • electrochemical
  • nitrite
  • copper
  • sensor


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