Greener Approach to Prepare Electrospun Antibacterial β-Cyclodextrin/Cellulose Acetate Nanofibers for Removal of Bacteria from Water

Lebea N. Nthunya; Monaheng L. Masheane; Soraya P. Malinga; Edward N. Nxumalo; Tobias G. Barnard; Mahalieo Kao; Zikhona N. Tetana; Sabelo D. Mhlanga

doi:10.1021/acssuschemeng.6b01089

Greener Approach to Prepare Electrospun Antibacterial β-Cyclodextrin/Cellulose Acetate Nanofibers for Removal of Bacteria from Water

Lebea N. Nthunya, Monaheng L. Masheane, Soraya P. Malinga, Edward N. Nxumalo, Tobias G. Barnard, Mahalieo Kao, Zikhona N. Tetana, Sabelo D. Mhlanga

Chemical Sciences

Research output: Contribution to journal › Article › peer-review

53 Citations (Scopus)

Abstract

This work reports the synthesis of β-cyclodextrin (β-CD)/cellulose (CA) nanofibers embedded with silver (Ag) and silver/iron (Ag/Fe) nanoparticles (NPs) via a benign process involving in situ electrospinning of the biopolymers with Ag and Fe salts. The electrospun nanocomposite fibers containing Ag⁺/Fe³⁺ ions were then subjected to UV photochemical reduction in the presence of water vapor under inert atmosphere to reduce the ions to zerovalent state. SEM and TEM revealed that the average diameter of the β-CD/CA nanofibers was 382.12 ± 30.09 nm and that the diameters of Ag and Ag/Fe NPs were 38.81 ± 8.21 nm and 56.29 ± 12.64 nm, respectively, after reduction. The XRD and EDS analysis confirmed the presence of the Ag and Fe NPs on the surface of the nanofibers. The effect of UV irradiation time on the reduction of the Ag⁺ and Fe³⁺ was studied by measuring the UV-vis absorbance of the reduced NPs. The biocidal effect of Ag and Ag/Fe was investigated using 12 different strains of bacteria. The Ag and Ag/Fe NPs embedded on the β-CD/CA nanofibers exhibited a strong biocidal effect on all of the bacteria strains.

Original language	English
Pages (from-to)	153-160
Number of pages	8
Journal	ACS Sustainable Chemistry and Engineering
Volume	5
Issue number	1
DOIs	https://doi.org/10.1021/acssuschemeng.6b01089
Publication status	Published - 3 Jan 2017

Keywords

Bacteria
Cellulose acetate
Nanofibers
Silver/iron nanoparticles
Water purification
β-Cyclodextrins

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Renewable Energy, Sustainability and the Environment

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10.1021/acssuschemeng.6b01089

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title = "Greener Approach to Prepare Electrospun Antibacterial β-Cyclodextrin/Cellulose Acetate Nanofibers for Removal of Bacteria from Water",

abstract = "This work reports the synthesis of β-cyclodextrin (β-CD)/cellulose (CA) nanofibers embedded with silver (Ag) and silver/iron (Ag/Fe) nanoparticles (NPs) via a benign process involving in situ electrospinning of the biopolymers with Ag and Fe salts. The electrospun nanocomposite fibers containing Ag+/Fe3+ ions were then subjected to UV photochemical reduction in the presence of water vapor under inert atmosphere to reduce the ions to zerovalent state. SEM and TEM revealed that the average diameter of the β-CD/CA nanofibers was 382.12 ± 30.09 nm and that the diameters of Ag and Ag/Fe NPs were 38.81 ± 8.21 nm and 56.29 ± 12.64 nm, respectively, after reduction. The XRD and EDS analysis confirmed the presence of the Ag and Fe NPs on the surface of the nanofibers. The effect of UV irradiation time on the reduction of the Ag+ and Fe3+ was studied by measuring the UV-vis absorbance of the reduced NPs. The biocidal effect of Ag and Ag/Fe was investigated using 12 different strains of bacteria. The Ag and Ag/Fe NPs embedded on the β-CD/CA nanofibers exhibited a strong biocidal effect on all of the bacteria strains.",

keywords = "Bacteria, Cellulose acetate, Nanofibers, Silver/iron nanoparticles, Water purification, β-Cyclodextrins",

author = "Nthunya, {Lebea N.} and Masheane, {Monaheng L.} and Malinga, {Soraya P.} and Nxumalo, {Edward N.} and Barnard, {Tobias G.} and Mahalieo Kao and Tetana, {Zikhona N.} and Mhlanga, {Sabelo D.}",

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doi = "10.1021/acssuschemeng.6b01089",

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T1 - Greener Approach to Prepare Electrospun Antibacterial β-Cyclodextrin/Cellulose Acetate Nanofibers for Removal of Bacteria from Water

AU - Nthunya, Lebea N.

AU - Masheane, Monaheng L.

AU - Malinga, Soraya P.

AU - Nxumalo, Edward N.

AU - Barnard, Tobias G.

AU - Kao, Mahalieo

AU - Tetana, Zikhona N.

AU - Mhlanga, Sabelo D.

PY - 2017/1/3

Y1 - 2017/1/3

N2 - This work reports the synthesis of β-cyclodextrin (β-CD)/cellulose (CA) nanofibers embedded with silver (Ag) and silver/iron (Ag/Fe) nanoparticles (NPs) via a benign process involving in situ electrospinning of the biopolymers with Ag and Fe salts. The electrospun nanocomposite fibers containing Ag+/Fe3+ ions were then subjected to UV photochemical reduction in the presence of water vapor under inert atmosphere to reduce the ions to zerovalent state. SEM and TEM revealed that the average diameter of the β-CD/CA nanofibers was 382.12 ± 30.09 nm and that the diameters of Ag and Ag/Fe NPs were 38.81 ± 8.21 nm and 56.29 ± 12.64 nm, respectively, after reduction. The XRD and EDS analysis confirmed the presence of the Ag and Fe NPs on the surface of the nanofibers. The effect of UV irradiation time on the reduction of the Ag+ and Fe3+ was studied by measuring the UV-vis absorbance of the reduced NPs. The biocidal effect of Ag and Ag/Fe was investigated using 12 different strains of bacteria. The Ag and Ag/Fe NPs embedded on the β-CD/CA nanofibers exhibited a strong biocidal effect on all of the bacteria strains.

AB - This work reports the synthesis of β-cyclodextrin (β-CD)/cellulose (CA) nanofibers embedded with silver (Ag) and silver/iron (Ag/Fe) nanoparticles (NPs) via a benign process involving in situ electrospinning of the biopolymers with Ag and Fe salts. The electrospun nanocomposite fibers containing Ag+/Fe3+ ions were then subjected to UV photochemical reduction in the presence of water vapor under inert atmosphere to reduce the ions to zerovalent state. SEM and TEM revealed that the average diameter of the β-CD/CA nanofibers was 382.12 ± 30.09 nm and that the diameters of Ag and Ag/Fe NPs were 38.81 ± 8.21 nm and 56.29 ± 12.64 nm, respectively, after reduction. The XRD and EDS analysis confirmed the presence of the Ag and Fe NPs on the surface of the nanofibers. The effect of UV irradiation time on the reduction of the Ag+ and Fe3+ was studied by measuring the UV-vis absorbance of the reduced NPs. The biocidal effect of Ag and Ag/Fe was investigated using 12 different strains of bacteria. The Ag and Ag/Fe NPs embedded on the β-CD/CA nanofibers exhibited a strong biocidal effect on all of the bacteria strains.

KW - Bacteria

KW - Cellulose acetate

KW - Nanofibers

KW - Silver/iron nanoparticles

KW - Water purification

KW - β-Cyclodextrins

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SN - 2168-0485

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SP - 153

EP - 160

JO - ACS Sustainable Chemistry and Engineering

JF - ACS Sustainable Chemistry and Engineering

IS - 1

ER -

Greener Approach to Prepare Electrospun Antibacterial β-Cyclodextrin/Cellulose Acetate Nanofibers for Removal of Bacteria from Water

Abstract

Keywords

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