Highly selective amperometric nitrite sensor based on chemically reduced graphene oxide modified electrode

Veerappan Mani, Arun Prakash Periasamy, Shen Ming Chen

Research output: Contribution to journalArticlepeer-review

292 Scopus citations

Abstract

Herein, we report a highly selective amperometric nitrite sensor using a chemically reduced graphene oxide (CR-GO) modified glassy carbon electrode (GCE). The nitrite oxidation peak current (I p) at CR-GO/GCE was 1.3 and 2.2 fold higher than that of electrochemically reduced graphene oxide (ER-GO) and unmodified GCEs respectively. Moreover, nitrite oxidation at CR-GO/GCE occurred at + 0.8 V, roughly 80 and 130 mV lower potential than ER-GO and unmodified GCEs respectively. CR-GO/GCE detects nitrite in the linear range of 8.9-167 μM, with a sensitivity of 0.0267 A M - 1. The limit of detection (LOD) was 1 μM. This sensor selectively detects nitrite even in the presence of 1000/250 fold of common ions and biological interferrants. CR-GO/GCE also demonstrates an excellent operational stability and good antifouling properties. The excellent recovery (~ 99%) achieved for nitrite determination in various water samples reveal its promising practicality. © 2012 Elsevier B.V.
Original languageEnglish (US)
Pages (from-to)75-78
Number of pages4
JournalElectrochemistry Communications
Volume17
Issue number1
DOIs
StatePublished - Apr 1 2012
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-21

ASJC Scopus subject areas

  • Electrochemistry

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