TY - JOUR
T1 - Highly selective amperometric nitrite sensor based on chemically reduced graphene oxide modified electrode
AU - Mani, Veerappan
AU - Periasamy, Arun Prakash
AU - Chen, Shen Ming
N1 - Generated from Scopus record by KAUST IRTS on 2023-09-21
PY - 2012/4/1
Y1 - 2012/4/1
N2 - 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.
AB - 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.
UR - https://linkinghub.elsevier.com/retrieve/pii/S1388248112000574
UR - http://www.scopus.com/inward/record.url?scp=84863338228&partnerID=8YFLogxK
U2 - 10.1016/j.elecom.2012.02.009
DO - 10.1016/j.elecom.2012.02.009
M3 - Article
SN - 1388-2481
VL - 17
SP - 75
EP - 78
JO - Electrochemistry Communications
JF - Electrochemistry Communications
IS - 1
ER -