fulltext.study @t Gmail

A versatile effect of chitosan-silver nanocomposite for surface plasmonic photocatalytic and antibacterial activity

Paper ID Volume ID Publish Year Pages File Format Full-Text
30148 44460 2015 11 PDF Available
Title
A versatile effect of chitosan-silver nanocomposite for surface plasmonic photocatalytic and antibacterial activity
Abstract

•An economic and eco-friendly synthesis of chitosan-silver (CS-Ag) nanocomposite.•Optical, structural, thermal, and elemental analyses were characterised.•Investigation of surface plasmonic photocatalytic effect of Ag in chitosan.•The dye decolourisation properties were elucidated.•The antimicrobial potentials of CS-Ag nanocomposite were evaluated.

Chitosan-silver (CS-Ag) nanocomposite was green synthesised without the aid of any external chemical-reducing agents. The synthesised nanocomposite was characterised by UV–visible spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), high-resolution transmission electron microscopy (HR-TEM) with selected area electron diffraction (SAED), X-ray photoelectron spectroscopy (XPS), and zeta potential analyser. The particle size of the synthesised CS-Ag nanocomposite was around 20 nm and was found to be thermally stable in comparison with pure chitosan. The prepared nanocomposite acts as a photocatalyst for dye decolourisation, with a maximum of 81% of methyl orange (MO) decolourisation that occurred under visible light irradiation. The kinetics was found to follow pseudo-first-order according to Langmuir–Hinshelwood (L–H) model. The nanocomposite also proved to be an excellent antimicrobial agent against both Gram-positive and Gram-negative bacteria, possessing a broad spectrum of antimicrobial activity. The zone of inhibition ranged between 16.000 ± 1.000 and 19.333 ± 1.155 (mm), proving its high susceptibility than chitosan itself. The minimum inhibitory concentration (MIC) values were from 8 to 64 μg/mL, whereas the minimum bactericidal concentration (MBC) values ranged from 16 to 128 μg/mL, with the highest antibacterial activity shown against Gram-positive Staphlococcus aureus. This report illustrates the eco-friendly approach for the reduction of silver using chitosan as a reducing agent, and its potential to dye decay and microbial contaminants.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Chitosan-silver nanocomposite; Photocatalysis; Antimicrobial activity; Minimum inhibitory concentration; Minimum bactericidal concentration
First Page Preview
A versatile effect of chitosan-silver nanocomposite for surface plasmonic photocatalytic and antibacterial activity
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 153, December 2015, Pages 412–422
Authors
, , , , , ,
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