Ultrasensitive electrochemical sensor based on dimethylglyoxime/carbon paste electrode modified with a bimetallic nanocomposite for nickel detection in environmental water samples

[Display omitted] •A bimetallic nanocomposite derived AgNPs/Fe3O4 on DMG/CPE for Ni sensor.•The sensor has a good reproducibility, repeatability, selectivity, and reliability.•The sensor has a broad linear range of Ni2+ detection with a LOD value of 0.6 nM.•It is potentially applied for monitoring N...

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Bibliographic Details
Published in:	Inorganic chemistry communications Vol. 169; p. 113051
Main Authors:	Setiyanto, Henry, Nega Reni Damayanti, Ajeng, Permata Sari, Sunarseh, Saraswaty, Vienna, Mufti, Nandang
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-11-2024
Subjects:	AgNPs Carbon paste electrode DMG Fe3O4 Nickel Fe3O4 AgNPs Nickel Carbon paste electrode DMG
Online Access:	Get full text
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Summary:	[Display omitted] •A bimetallic nanocomposite derived AgNPs/Fe3O4 on DMG/CPE for Ni sensor.•The sensor has a good reproducibility, repeatability, selectivity, and reliability.•The sensor has a broad linear range of Ni2+ detection with a LOD value of 0.6 nM.•It is potentially applied for monitoring Ni2+ in river water. To date, research in the monitoring of heavy metal pollution focuses on developing an advanced and selective sensor. In this study, an electrochemical sensor-based bimetallic nanocomposite modified dimethylglyoxime carbon paste electrode (DMG/CPE) was created to detect Ni2+ selectively. The bimetallic nanocomposite was prepared by depositing a thin layer of silver nanoparticles (AgNPs) on the surface of the magnetite (Fe3O4)/DMG/CPE electrode. The incorporation of Fe3O4 and AgNPs results in a synergistic effect, increasing electron transfer and expanding the electroactive surface area (from 2.78 mm2 to 3.81 mm2), hence leading to an increase in the peak current response (ΔIp = 26.15 ± 0.33 µA at modified CPE). The prepared AgNPs/Fe3O4/DMG/CPE electrode demonstrated excellent properties, allowing for a broad linear dynamic range lying between 2–10 nM; 10–100 nM; and 100–1000 nM and a limit of detection value of 0.6 nM (S/N = 3). Additionally, the developed sensor showed great sensitivity, selectivity, and reliability in the detection of Ni2+ in river water samples, making it promising for a sensitive and selective detection of Ni-contaminated water.
ISSN:	1387-7003
DOI:	10.1016/j.inoche.2024.113051