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Enhanced visible light photocatalytic inactivation of Escherichia coli using silver nanoparticles as photocatalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
30128 44460 2015 6 PDF Available
Title
Enhanced visible light photocatalytic inactivation of Escherichia coli using silver nanoparticles as photocatalyst
Abstract

•Green synthesis of AgNPs using Cirsium arvense plant extract.•The AgNPs were well dispersed, spherical shape and small sized (< 15 nm).•We determined the effect of extract concentration and pH on the formation of AgNPs.•The AgNPs were screened for photo inactivation of E. coli.•Effect of irradiation time, size and shape of AgNPs on the inhibition of E. coli.

The silver nanoparticles (AgNPs) were green synthesized using Cirsium arvense plant extract as a reducing and stabilizing agent, with superior photo inactivation activity against Escherichia coli (E. coli). The synthesized AgNPs had crystalline structure and were characterized by UV–vis spectroscopy, XRD, HRTEM, SEM, EDX and FT-IR. The formation of nanoparticles was observed at different pH and different plant extract concentrations and it was found that at higher pH (pH > 6) and at lower concentration (10 mL), the reducing and stabilizing efficiency of plant extract was increased. The synthesized AgNPs had small size (< 15 nm) and spherical shape. The AgNPs were evaluated for antibacterial activity against E. coli. Before transferring it to antibacterial activity, it was placed under visible light for 120 min. The same experiment was performed in dark as a control medium. The photo irradiated AgNPs were observed to be more effective against E. coli. The results showed, that the diameter of zone of inhibition of visible light irradiated AgNPs against E. coli was 23 (± 0.5) mm and in dark was 11 (± 0.4) mm.

Keywords
Cirsium arvense; Green synthesis; Nanoparticles; Antibacterial activity; Escherichia coli
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Enhanced visible light photocatalytic inactivation of Escherichia coli using silver nanoparticles as photocatalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 153, December 2015, Pages 261–266
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us