Computer-assisted electrochemical fabrication of a highly selective and sensitive amperometric nitrite sensor based on surface decoration of electrochemically reduced graphene oxid...

Authors
Gholivand, Mohammad Bagher; Jalalvand, Alí R.; Goicoechea, Hector Casimiro
Publication Year
2014
Language
English
Format
article
Status
Published version
Description
For the first time, a novel, robust and very attractive statistical experimental design (ED) using minimum-run equireplicated resolution IV factorial design (Min-Run Res IV FD) coupled with face centered central composite design (FCCCD) and Derringer's desirability function (DF) was developed to fabricate a highly selective and sensitive amperometric nitrite sensor based on electrodeposition of CoNi bimetallic alloy nanoparticles (NPs) on electrochemically reduced graphene oxide (ERGO) nanosheets. The modifications were characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), energy dispersive X-ray spectroscopic (EDS), scanning electron microscopy (SEM) techniques. The CoNi bimetallic alloy NPs were characterized using digital image processing (DIP) for particle counting (density estimation) and average diameter measurement. Under the identified optimal conditions, the novel sensor detects nitrite in concentration ranges of 0.1?30.0 μMand 30.0?330.0 μMwith a limit of detection (LOD) of 0.05 μM. This sensor selectively detects nitrite even in the presence of high concentration of common ions and biological interferents therefore, we found that the sensor is highly selective. The sensor also demonstrated an excellent operational stability and good antifouling properties. The proposed sensor was used to the determination of nitrite in several foodstuff and water samples.
Fil: Gholivand, Mohammad Bagher. Razi University. Faculty of Chemistry; Irán
Fil: Jalalvand, Alí R.. Razi University. Faculty of Chemistry; Irán. Universidad Nacional del Litoral. Cátedra de Química Analítica I. Laboratorio de Desarrollo Analítico y Quimiometría; Argentina
Fil: Goicoechea, Hector Casimiro. Universidad Nacional del Litoral. Cátedra de Química Analítica I. Laboratorio de Desarrollo Analítico y Quimiometría; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe; Argentina
Subject
NITRITE SENSOR
ELECTROCHEMICAL FABRICATION
EXPERIMENTAL DESIGN
SIMULTANEOUS OPTIMIZATION
Química Analítica
Ciencias Químicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/15385