TY - JOUR
T1 - Facile synthesis of graphene oxide-silver nanocomposite and its modified electrode for enhanced electrochemical detection of nitrite ions
AU - Ikhsan, Nurul Izrini
AU - Rameshkumar, Perumal
AU - Pandikumar, Alagarsamy
AU - Mehmood Shahid, Muhammad
AU - Huang, Nay Ming
AU - Vijay Kumar, Swadi
AU - Lim, Hong Ngee
N1 - Funding Information:
This work was supported by the UMRG Programme Grant ( PRP007-13AFR ) and the High Impact Research Grant from the Ministry of Higher Education of Malaysia ( UM.C/625/1/HIR/MOHE/05 ). Nurul Izrini Ikhsan would like to thank the Ministry of Higher Education (MOHE) and MARA University of Technology (UiTM) for the scholarship sponsored.
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/7/25
Y1 - 2015/7/25
N2 - Abstract In this report, silver nanoparticles (Ag NPs) were successfully deposited on graphene oxide (GO) sheets to form GO-Ag nanocomposite using garlic extract and sunlight and the nanocomposite modified glassy carbon (GC) electrode was applied as an electrochemical sensor for the detection of nitrite ions. The formation of GO-Ag nanocomposite was confirmed by using UV-visible absorption spectroscopy, TEM, XRD and FTIR spectroscopy analyses. Further, TEM pictures showed a uniform distribution Ag on GO sheets with an average size of 19 nm. The nanocomposite modified electrode produced synergistic catalytic current in nitrite oxidation with a negative shift in overpotential. The limit of detection (LOD) values were found as 2.1 μM and 37 nM, respectively using linear sweep voltammetry (LSV) and amperometric i-t curve techniques. The proposed sensor was stable, reproducible, sensitive and selective toward the detection nitrite and could be applied for the detection of nitrite in real water sample.
AB - Abstract In this report, silver nanoparticles (Ag NPs) were successfully deposited on graphene oxide (GO) sheets to form GO-Ag nanocomposite using garlic extract and sunlight and the nanocomposite modified glassy carbon (GC) electrode was applied as an electrochemical sensor for the detection of nitrite ions. The formation of GO-Ag nanocomposite was confirmed by using UV-visible absorption spectroscopy, TEM, XRD and FTIR spectroscopy analyses. Further, TEM pictures showed a uniform distribution Ag on GO sheets with an average size of 19 nm. The nanocomposite modified electrode produced synergistic catalytic current in nitrite oxidation with a negative shift in overpotential. The limit of detection (LOD) values were found as 2.1 μM and 37 nM, respectively using linear sweep voltammetry (LSV) and amperometric i-t curve techniques. The proposed sensor was stable, reproducible, sensitive and selective toward the detection nitrite and could be applied for the detection of nitrite in real water sample.
KW - Electrochemical sensor
KW - Graphene oxide
KW - Nanocomposite
KW - Nitrite
KW - Silver nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=84938099264&partnerID=8YFLogxK
U2 - 10.1016/j.talanta.2015.07.050
DO - 10.1016/j.talanta.2015.07.050
M3 - Article
AN - SCOPUS:84938099264
SN - 0039-9140
VL - 144
SP - 908
EP - 914
JO - Talanta
JF - Talanta
M1 - 15815
ER -