Iron, copper and silver nanoparticles: Green synthesis using green and black tea leaves extracts and evaluation of antibacterial, antifungal and aflatoxin B1 adsorption activity

Asghar, Muhammad Asif; Zahir, Erum; Shahid, Syed Muhammad; Khan, Muhammad Farid; Asghar, Muhammad Arif; Iqbal, Javed; Walker, Gavin

doi:10.1016/j.lwt.2017.12.009

Cited by 218 publications

(107 citation statements)

References 21 publications

(16 reference statements)

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“…During synthesis of iron nanoparticles the reduction of Fe 2+ or Fe 3+ ions to Fe 0 is confirmed by visible color change to brown/black depending of nanoparticles concentration in the reaction mixture. Color change indicated the formation of FeNPs physically (Mohamed et al, 2015;Devatha et al, 2016;Ahmad et al, 2017;Asghar et al, 2018;Fahmy et al, 2018). For the four extracellular filtrates used in this study a brown color was revealed in all samples at the end of the assay, but confirmation of FeNPs was carry out by UV-visible spectrophotometer and analysis TEM.…”

Section: Discussionmentioning

confidence: 87%

“…The peak obtained for FeNPs could varies in the range of 300-500 nm (Devatha et al, 2016). A strong peak at 272 nm was detected during bio-fabrication of iron nanoparticles by using Azadirachta indica leaf (Ahmad et al, 2017), 325 and 296 nm (Devatha et al, 2018), 285 and 324 nm; 216 and 265 nm (Fahmy et al, 2018), 266 and 274 nm (Asghar et al, 2018) all of them using different plant extracts. Magnetic iron oxide (Fe3O4) nanoparticles was biosynthesized using aqueous extract of food processing waste, peaks at 330 and 365 nm from MH-FeNPs, and 325 and 365 nm from CCP-FeNPs were detected, absorption band at 355 nm indicated the formation of nano-sized Fe3O4 NPs (Patra et al, 2017).…”

Section: Discussionmentioning

confidence: 97%

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Biosynthesis of iron nanoparticles (FeNPs) by Alternaria alternata MVSS-AH-5

et al. 2019

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The ability of four extracellular filtrates (FE), obtained from A. alternata biomass grown in four different culture media; malt dextrose broth (MDB), potato dextrose broth (PDB), sucrose (S) and Czapek (C), were evaluated to biosynthesize iron nanoparticles (FeNPs), at the end of the assay a brown color was revealed in all the samples. To evidence biosynthesis of nanoparticles, absorption spectra were made from 200 to 600 nm for all the samples and, analyzed by transmission electronic microscopy (TEM). The morphology and size of the synthesized FeNPs were studied using the SPIP 6.2.0 software. From the four extracellular filtrates assays, the nanoparticles biosynthesis was possible only in the EF-PDB and EF-C, showing their presence in the UV-vis spectrum when forming an absorption band at 226 and 225 respectively, and plateau around at 270 nm to EF-PDB, and 290 nm to EF-C. The synthesized nanoparticles presented spherical and polydisperse form, those synthesized with EF-PDB showed a size of 20-40 nm, while those synthesized with EF-C had a size of 10-80 nm. Six months after their production, the FeNPs biosynthesized by EF-C were analyzed by microscopy showing an

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Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 97%

Biosynthesis of iron nanoparticles (FeNPs) by Alternaria alternata MVSS-AH-5

et al. 2019

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“…Recently, in a comparative study iron, copper and silver nanoparticles was synthesized using green and black tea leaves extracts and their evaluation of antibacterial activity was done against Staphylococcus aureus strains. The antibacterial activity was in the order Ag-NPs > Cu-NPs > Fe-NPs both synthesized using green and black tea leaves extracts [34].…”

Section: Antibacterial Activity Of Copper Oxide Nanoparticlesmentioning

confidence: 99%

Green Synthesis of Metal Oxide Nanoparticles and Studies of Their Antibacterial Efficacy against Common Pathogens

2019

ANN

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Green synthesis of metal oxide nanoparticles has been emerging highlight of the research owing to its unique properties that make them applicable in various fields of science and technology. The method of synthesis is simple, cost effective and environmental friendly. After review, we reported the phyto-synthesis of metal oxide nanoparticles using plant extract with an emphasis on recent developments. Biomolecules such as alkaloids, flavonoids, polyphenols etc. present in the plant extract can be used for the reduction of metal ions to nanoparticles in a single step process. These extract also act as a stabilizing agent. Although, a good number of work has been reported for the synthesis of gold and silver nanoparticles. However, limited no of work has been reported for the synthesis of copper, zinc and iron oxide nanoparticles. We have discussed the green synthesis of copper, zinc and iron oxide nanoparticles and potential of their antibacterial efficacy

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“…For instance, the synthesized AgNPs by green tea and black tea leaves extracts inhibited approximately 80% of Aspergillus sp. [45] Moreover, inhibition zones of 12 mm were found when AgNPs were synthesized using Aspergillus niger filtrate [46]. As a comparison, Table 4 lists the inhibition zone of AgNPs against Aspergillus sp.…”

Section: Antifungal Investigationmentioning

confidence: 99%

A green deposition method of silver nanoparticles on textiles and their antifungal activity

2019

Biointerface Res Appl Chem

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This study aims to propose a new green method for the deposition of silver nanoparticles (AgNPs) on textiles without the use of chemical compounds as binders. The deposition of AgNPs on textiles was achieved by immersing textiles in silver nitrate solution before adding with a natural reducing agent obtained from the extraction of Mikania micrantha. Plasmonic properties of the synthesized AgNPs were characterized using Ultraviolet-visible (UV-vis) spectroscopy and surface morphology of textiles was identified using the fieldemission scanning electron microscopy (FESEM). In addition, energy-dispersive X-ray spectroscopy was also employed for the characterization. Inhibition zone measurement was performed for evaluating the antifungal capability of textiles attached with AgNPs. This study showed that the attachment of AgNPs to several textile types (cotton, cotton-polyester, silk, and fiber) without the use of binders or other chemical compounds had been successfully achieved. Moreover, all textiles attached with AgNP exhibited effective antifungal activity.

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Iron, copper and silver nanoparticles: Green synthesis using green and black tea leaves extracts and evaluation of antibacterial, antifungal and aflatoxin B1 adsorption activity

Cited by 218 publications

References 21 publications

Biosynthesis of iron nanoparticles (FeNPs) by Alternaria alternata MVSS-AH-5

Biosynthesis of iron nanoparticles (FeNPs) by Alternaria alternata MVSS-AH-5

Green Synthesis of Metal Oxide Nanoparticles and Studies of Their Antibacterial Efficacy against Common Pathogens

A green deposition method of silver nanoparticles on textiles and their antifungal activity

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