Spherical silver oxide nanoparticles for fabrication of electrochemical sensor for efficient 4-Nitrotoluene detection and assessment of their antimicrobial activity

This research article reports an economic and affordable microwave-assisted synthesis of spherical silver oxide nanoparticles (Ag2O NPs) (80–90 nm) for an efficient electrochemical sensing of a hazardous organic pollutant 4-nitrotoluene (4-NT). Such well-characterized Ag2O NPs were utilized to modif...

Full description

Saved in:
Bibliographic Details
Published in:The Science of the total environment 2022-02, Vol.808, p.152179-152179, Article 152179
Main Authors: Chakraborty, Urmila, Garg, Preeti, Bhanjana, Gaurav, Kaur, Gurpreet, Kaushik, Ajeet, Chaudhary, Ganga Ram
Format: Article
Language:English
Subjects:
4-nitrotoluene (4-NT)
Anti-Infective Agents
Electrochemical sensor
Electrochemical Techniques
Electrodes
Escherichia coli
Gold
Metal Nanoparticles
Microwave synthesis
Oxides
Silver Compounds
Spherical Ag2O nanoparticles
Staphylococcus aureus
Toluene - analogs & derivatives
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This research article reports an economic and affordable microwave-assisted synthesis of spherical silver oxide nanoparticles (Ag2O NPs) (80–90 nm) for an efficient electrochemical sensing of a hazardous organic pollutant 4-nitrotoluene (4-NT). Such well-characterized Ag2O NPs were utilized to modify gold (Au) electrode in order to fabricate Ag2O-NPs/Au sensor to detect 4-NT using cyclic voltammetry (CV) and linear sweep voltammetry (LSV) techniques. Ag2O-NPs/Au sensor exhibited a distinguished electrical response as a function of varying 4-NT concentration in neutral medium samples. Ag2O-NPs/Au sensor demonstrated an ultrahigh sensitivity as 15.33 μA (μM)−1 cm−2, a low detection limit of 62.3 nM, and linear response in detection ranges of 0.6–5.9 μM and 37–175 μM. The sensing performance of fabricated Ag2O-NPs/Au sensor is reproducible, reusable, selective in presence of other chemical species, and validated using real samples. The Ag2O/Au sensor had much rapid and easy fabrication process and offered much lower LOD for 4-NT detection than many previously reported sensors. Along with efficient electrochemical activity, the spherical Ag2O NPs also exhibit remarkable antimicrobial activity against harmful gram negative Escherichia coli (E. coli) and gram positive Staphylococcus aureus (S. aureus) bacteria. Herein projected efficient Ag2O-NPs/Au electrochemical sensor for 4-NT is affordable with the capability of scaling up to perform point-of-care 4-NT testing needed for successful environmental monitoring and water quality assurance. [Display omitted] •Microwave assisted synthesis of spherical silver oxide (Ag2O) nanoparticles (NPs).•Efficient electrochemical detection of 4-nitrotoluene with Ag2O NPs/Au sensor.•15.33 μA (μM)−1 cm2 sensitivity, 0.6–5.9 μM & 37–175 μM LDR, and LOD of 62.3 nM.•Ag2O NPs/Au sensor exhibited good sensing activity in real water.•Appreciable antibacterial activity against E. coli and S. aureus.
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2021.152179