TY - JOUR
T1 - Towards green synthesis of monodisperse Cu nanoparticles
T2 - An efficient and high sensitive electrochemical nitrite sensor
AU - Manoj, Devaraj
AU - Saravanan, R.
AU - Santhanalakshmi, Jayadevan
AU - Agarwal, Shilpi
AU - Gupta, Vinod Kumar
AU - Boukherroub, Rabah
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - The development of highly stable and biocompatible Cu nanocomposite has been employed herein as an electrocatalytic active material for electrochemical sensing. The synthesis of carboxymethyl cellulose (CMC) stabilized Cu nanoparticles in aqueous medium under room temperature has been carried out. To identify the surface properties of the synthesized Cu nanoparticles, X-ray diffraction (XRD) and X-ray photoelectron spectroscopic (XPS) studies have been carried out. The as-prepared Cu nanoparticles were dispersed with multi-walled carbon nanotubes (MWCNTs) and the resultant dispersion has been deposited over glassy carbon (GC) electrode to obtain Cu/MWCNTs/GC modified electrode. The Cu/MWCNTs modified GC electrode exhibits a well-defined oxidation peak at Epa = 0.93 V (vs. SCE) towards the oxidation of nitrite. Amperometric investigations of the modified electrode revealed a wide linear range for nitrite from 5 μM to 1260 μM with a sensitivity and detection limit of 455.84 μA mM−1 cm−2 and 1.8 μM, respectively. The proposed modified electrode displayed excellent selectivity and reproducibility and has been successfully utilized for determination of nitrite in real samples.
AB - The development of highly stable and biocompatible Cu nanocomposite has been employed herein as an electrocatalytic active material for electrochemical sensing. The synthesis of carboxymethyl cellulose (CMC) stabilized Cu nanoparticles in aqueous medium under room temperature has been carried out. To identify the surface properties of the synthesized Cu nanoparticles, X-ray diffraction (XRD) and X-ray photoelectron spectroscopic (XPS) studies have been carried out. The as-prepared Cu nanoparticles were dispersed with multi-walled carbon nanotubes (MWCNTs) and the resultant dispersion has been deposited over glassy carbon (GC) electrode to obtain Cu/MWCNTs/GC modified electrode. The Cu/MWCNTs modified GC electrode exhibits a well-defined oxidation peak at Epa = 0.93 V (vs. SCE) towards the oxidation of nitrite. Amperometric investigations of the modified electrode revealed a wide linear range for nitrite from 5 μM to 1260 μM with a sensitivity and detection limit of 455.84 μA mM−1 cm−2 and 1.8 μM, respectively. The proposed modified electrode displayed excellent selectivity and reproducibility and has been successfully utilized for determination of nitrite in real samples.
KW - Cu nanoparticles
KW - Electrochemical sensor
KW - Green chemistry
KW - MWCNTs
KW - Nitrite
UR - https://www.scopus.com/pages/publications/85045030181
U2 - 10.1016/j.snb.2018.03.141
DO - 10.1016/j.snb.2018.03.141
M3 - Article
AN - SCOPUS:85045030181
SN - 0925-4005
VL - 266
SP - 873
EP - 882
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -