Colorimetric sensing of Fe3+ and Hg2+ and photocatalytic activity of green synthesized silver nanoparticles from the leaf extract of Sonchus arvensis L

In the present study, an eco-friendly method was reported for the green synthesis of silver nanoparticles (AgNPs) using Sonchus arvensis (SA) leaf extract. Phytochemical analysis of plant extract revealed the presence of flavonoids, tannins, glycosides, and alkaloids, which might be used as a potent...

Full description

Saved in:
Bibliographic Details
Published in:New journal of chemistry 2019-12, Vol.43 (46), p.18175-18183
Main Authors: Chandraker, Sandip Kumar, Ghosh, Mithun Kumar, Lal, Mishri, Ghorai, Tanmay Kumar, Shukla, Ravindra
Format: Article
Language:English
Subjects:
Alkaloids
Aqueous solutions
Biosensors
Catalytic activity
Colorimetry
Dyes
Energy gap
Ferric ions
Flavonoids
Functional groups
Gold
Heavy metals
Infrared spectroscopy
Mercury (metal)
Methylene blue
Nanoparticles
Photocatalysis
Silver
Sonchus
Spectrum analysis
Stabilizers (agents)
Tannins
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In the present study, an eco-friendly method was reported for the green synthesis of silver nanoparticles (AgNPs) using Sonchus arvensis (SA) leaf extract. Phytochemical analysis of plant extract revealed the presence of flavonoids, tannins, glycosides, and alkaloids, which might be used as a potential capping, reducing, and stabilizing agent in the process. SA-AgNPs were found to be stable with no evidence of agglomeration after one week. UV-vis spectroscopy showed a salient SPR peak of Ag0 at 440 nm, and the calculated bandgap (3.2 eV) explained the semiconducting behaviour of the NPs. The FT-IR spectra elucidated the functional groups of SA extract attached with Ag0. TEM and XRD revealed the spherical shape of SA-AgNPs with an average particle and crystalline size of 25 ± 5 and 16 ± 1 nm, respectively. A colorimetric method was employed for the quick detection of heavy metals in aqueous medium using SA-AgNPs. The obtained NPs were found to be highly selective and sensitive to Fe3+ and Hg2+ metal ions at a detection limit of 10−3 M and thereby act as noble solid bio-sensors. SA-AgNPs showed strong catalytic efficiency against methylene blue compared to other dyes in the presence of sunlight and completely degraded the dye within 1 hour. This catalytic efficiency was observed to be due to the lower bandgap value (3.2 eV) of SA-AgNPs.
ISSN:1144-0546
1369-9261
DOI:10.1039/c9nj01338e