“…The optical properties of prepared collide were investigated before and after doping the carbon nanoparticles with iron oxide nanoparticles. The UV-Vis absorption spectra exhibited a redshift as the doping ratios with iron oxide nanoparticles were increased, while the photoluminescence of carbon nanoparticles doped with iron oxide nanoparticles exhibited a constant fluorescence emission peaks in the visible region at 597 nm upon excitation at a wavelength of 250 nm, but with lower intensity, as the doping ratio increased; this is because of the effect of iron oxide nanoparticles in quenching the carbon nanoparticles fluorescence this results goes with [1,3,[13][14][15].…”
Section: Discussionmentioning
confidence: 89%
“…Figures 5 and 6 demonstrate the histograms and inhibition zone (IZ) image, respectively, of the anti-bacterial growth in media against gram-positive Streptococcus pyogens ( S. pyogenes ) and Staphylococcus aureus ( S. aureus ) pathogens which were induced by carbon nanotubes at 400 μg ml −1 concentration and composite carbon nanotubes doped with iron oxide NPs at three different concentrations ratios (20, 38, 42%) that goes with [ 4 , 8 , 9 , 14 , 15 ]. Fig.…”
Section: Discussionmentioning
confidence: 99%
“…The suspension fixations utilized were 400 μg ml −1 of just carbon nanotubes utilized as control, and afterward doped with iron oxide NPs of three distinct focuses (100, 250, 300 μg ml −1 ), which spoke to by doping proportions (20, 38, 43%) separately, gotten by laser removal of carbon and iron focuses in deionized water at a laser energy thickness of 5.2 J/cm 2 . Composite nanoparticles, which have demonstrated the best anti-bacterial activity in a fluid medium technique, are continually tried in a well-dissipating technique procedure and find that the best combinations of 400 μg/ml carbon nanotubes, which show the best anti-bacterial activity, are improved and end up being better when doped with 43% nanoparticles that indicate the outcome correspondence with [14][15][16][17][18][19].…”
Section: Discussionmentioning
confidence: 99%
“…To identify surface morphology of the stores and materials that have been concentrated by utilizing nuclear power magnifying instruments (AFM). XRD [1,3,[13][14][15][16].…”
Section: Aims Of the Studymentioning
confidence: 99%
“…While the photoluminescence of carbon nanoparticles doped Fe 3 O 4 /CNTs, oxide nanoparticles demonstrated a reliable fluorescence outpouring tops in perceptible region at 597 nm upon excitation at a frequency of 250 nm, yet with lower power, as the doping extent extended; this is an aftereffect of the effect of Fe 3 O 4 / CNTs nanoparticles in stifling the carbon nanoparticles fluorescence [7][8][9][10][11][12][13]. The anti-bacterial development of fused composite nanoparticles was attempted against four particular microorganism minuscule creatures and two gram-negative (Escherichia coli (E.coli), Klebsiella pneumoniae (K. pneumoniae) [8,9,[14][15][16][17][18][19].…”
Background
Environmental contamination by microbes is a major public health concern. A damp environment is one of the potential sources for microbe proliferation. Smart synthesis nanocatalytic coatings on surfaces, food, and material from different pathogen bacteria can inhibit using the Fe3O4/CNTs as anti-microbial growth can effectively curb this growing threat. In this present work, the anti-microbial efficacy of synthesis of a compound nanoparticle-containing iron oxide-multi-walled carbon nanotube was combined by laser ablation PLAL and explored the anti-bacterial action of colloidal solution of Fe3O4/CNTs NPs that was evaluated against bacteria which is classified as gram-negative (Escherichia coli (E. coli), Klebsiella pneumonia (K. pneumonia), and also that is identified as gram-positive (Streptococcus pyogenes (S .pyogenes) and Staphylococcus aureus (S. aureus) under visible light irradiation.
Results
Doping of a minute fraction of iron(III) salt (0.5 mol%) in a volatile solvent (ethanol) was carried out via the sol-gel technique. Fe3O4 was further calcined at various temperatures (in the range of 500–700 °C) to evaluate the thermal stability of the Fe3O4 nanoporous oxidizer nanoparticles. The physicochemical properties of the samples were characterized through X-ray diffraction (XRD), atomic force microscopy (AFM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), and UV–Visible spectroscopy techniques. XRD results revealed that the nanoparticles framework of Fe3O4 was maintained well up to 650 °C by the Fe dopant. UV–Vis results suggested that absorption property of combination Fe3O4/CNTs nanopowder by PLAL was enhanced and the band gap is reduced into 2.0 eV.
Conclusions
Density functional theory (DFT) studies emphasize the introduction of Fe+ and Fe2+ ions by replacing other ions in the CNT lattice, therefore creating oxygen vacancies. These further promoted anti-microbial efficiency. A significantly high bacterial inactivation that indicates results was evaluated and that the mean estimations of restraint were determined from triple assessment in every appraisal at 400 ml which represent the best anti-bacterial action against gram-positive and gram-negative microbes.
“…The optical properties of prepared collide were investigated before and after doping the carbon nanoparticles with iron oxide nanoparticles. The UV-Vis absorption spectra exhibited a redshift as the doping ratios with iron oxide nanoparticles were increased, while the photoluminescence of carbon nanoparticles doped with iron oxide nanoparticles exhibited a constant fluorescence emission peaks in the visible region at 597 nm upon excitation at a wavelength of 250 nm, but with lower intensity, as the doping ratio increased; this is because of the effect of iron oxide nanoparticles in quenching the carbon nanoparticles fluorescence this results goes with [1,3,[13][14][15].…”
Section: Discussionmentioning
confidence: 89%
“…Figures 5 and 6 demonstrate the histograms and inhibition zone (IZ) image, respectively, of the anti-bacterial growth in media against gram-positive Streptococcus pyogens ( S. pyogenes ) and Staphylococcus aureus ( S. aureus ) pathogens which were induced by carbon nanotubes at 400 μg ml −1 concentration and composite carbon nanotubes doped with iron oxide NPs at three different concentrations ratios (20, 38, 42%) that goes with [ 4 , 8 , 9 , 14 , 15 ]. Fig.…”
Section: Discussionmentioning
confidence: 99%
“…The suspension fixations utilized were 400 μg ml −1 of just carbon nanotubes utilized as control, and afterward doped with iron oxide NPs of three distinct focuses (100, 250, 300 μg ml −1 ), which spoke to by doping proportions (20, 38, 43%) separately, gotten by laser removal of carbon and iron focuses in deionized water at a laser energy thickness of 5.2 J/cm 2 . Composite nanoparticles, which have demonstrated the best anti-bacterial activity in a fluid medium technique, are continually tried in a well-dissipating technique procedure and find that the best combinations of 400 μg/ml carbon nanotubes, which show the best anti-bacterial activity, are improved and end up being better when doped with 43% nanoparticles that indicate the outcome correspondence with [14][15][16][17][18][19].…”
Section: Discussionmentioning
confidence: 99%
“…To identify surface morphology of the stores and materials that have been concentrated by utilizing nuclear power magnifying instruments (AFM). XRD [1,3,[13][14][15][16].…”
Section: Aims Of the Studymentioning
confidence: 99%
“…While the photoluminescence of carbon nanoparticles doped Fe 3 O 4 /CNTs, oxide nanoparticles demonstrated a reliable fluorescence outpouring tops in perceptible region at 597 nm upon excitation at a frequency of 250 nm, yet with lower power, as the doping extent extended; this is an aftereffect of the effect of Fe 3 O 4 / CNTs nanoparticles in stifling the carbon nanoparticles fluorescence [7][8][9][10][11][12][13]. The anti-bacterial development of fused composite nanoparticles was attempted against four particular microorganism minuscule creatures and two gram-negative (Escherichia coli (E.coli), Klebsiella pneumoniae (K. pneumoniae) [8,9,[14][15][16][17][18][19].…”
Background
Environmental contamination by microbes is a major public health concern. A damp environment is one of the potential sources for microbe proliferation. Smart synthesis nanocatalytic coatings on surfaces, food, and material from different pathogen bacteria can inhibit using the Fe3O4/CNTs as anti-microbial growth can effectively curb this growing threat. In this present work, the anti-microbial efficacy of synthesis of a compound nanoparticle-containing iron oxide-multi-walled carbon nanotube was combined by laser ablation PLAL and explored the anti-bacterial action of colloidal solution of Fe3O4/CNTs NPs that was evaluated against bacteria which is classified as gram-negative (Escherichia coli (E. coli), Klebsiella pneumonia (K. pneumonia), and also that is identified as gram-positive (Streptococcus pyogenes (S .pyogenes) and Staphylococcus aureus (S. aureus) under visible light irradiation.
Results
Doping of a minute fraction of iron(III) salt (0.5 mol%) in a volatile solvent (ethanol) was carried out via the sol-gel technique. Fe3O4 was further calcined at various temperatures (in the range of 500–700 °C) to evaluate the thermal stability of the Fe3O4 nanoporous oxidizer nanoparticles. The physicochemical properties of the samples were characterized through X-ray diffraction (XRD), atomic force microscopy (AFM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), and UV–Visible spectroscopy techniques. XRD results revealed that the nanoparticles framework of Fe3O4 was maintained well up to 650 °C by the Fe dopant. UV–Vis results suggested that absorption property of combination Fe3O4/CNTs nanopowder by PLAL was enhanced and the band gap is reduced into 2.0 eV.
Conclusions
Density functional theory (DFT) studies emphasize the introduction of Fe+ and Fe2+ ions by replacing other ions in the CNT lattice, therefore creating oxygen vacancies. These further promoted anti-microbial efficiency. A significantly high bacterial inactivation that indicates results was evaluated and that the mean estimations of restraint were determined from triple assessment in every appraisal at 400 ml which represent the best anti-bacterial action against gram-positive and gram-negative microbes.
The visible light catalytic antibacterial nanofiber membranes as a novel functional material were designed to solve the problem of bacterial infection and water pollution. In this work, oxygenated graphite carbon nitride nanosheets (O‐g‐C3N4) with 12% oxygen content were synthesized through thermal polycondensation followed by chemical oxidation. Exfoliation and dispersion of O‐g‐C3N4 were strongly enhanced compared to pristine g‐C3N4 due to rich hydrophilic carboxyl and hydroxyl groups. The amount of ROS generated by O‐g‐C3N4 was about 13.8% more than that of g‐C3N4. Then, the polyvinyl alcohol (PVA)/chitosan (CS)/O‐g‐C3N4 (PCO) composite nanofiber membranes were prepared by electrospinning. The contact angle of the PCO nanofiber membranes decreased from 55.0° ± 0.5 to 45.9° ± 0.2 along with the increased amount of O‐g‐C3N4, indicating the improvement of hydrophilicity. Meanwhile, the diameter of nanofibers increased from 148.0 ± 22.9 nm to 244.0 ± 52.3 nm with the loading ratio from 0% to 17%. The PCO nanofiber membranes exhibited significantly higher antibacterial activity compared to the blank nanofiber membranes and bare O‐g‐C3N4. The maximum diameter of the inhibition zone against Escherichia coli and Staphylococcus aureus could reach 26 ± 0.1 mm and 16 ± 0.2 mm, respectively. The inhibition rate against E. coli could reach 97% in 24 h under the irradiation of simulated sunlight. Based on reactive oxygen species (ROS) testing, zeta potential, and bacterial inhibition experiments, a possible synergistic mechanism was proposed. The electrostatic adsorption effect of PCO nanofiber membranes and ROS could effectively decompose the organic components of bacteria and destroy their structural integrity. The results indicated that the antibacterial PCO composite nanofiber membranes have wide application prospects in biomedical‐related fields.
A simple procedure was used to generate and decorate leather structures with different amounts from zinc oxide (ZnO) nanoparticles to produce multifunctional leather structure by pulsed laser ablation method in liquid media based on changing the ablation time in just one-pot method. The impact of varying concentrations of ZnO nanoparticles embedded on the surface of leather on water resistance, water vapor permeability, mechanical characteristics, and UV-shielding efficiency was examined by different characterization techniques like X-ray diffraction, surface area, UVvisible spectroscopy, scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy, and thermogravimetric analysis. The results showed that the combination between the external functional groups of leather with ZnO nanoparticles was discovered. ZnO nanoparticles effectively coated the surface of leather tissue, as seen by SEM images, and their form a spherical morphology. Leather with ZnO nanoparticles added had the highest capacity to kill Escherichia coli bacteria, exceeding leather without modification and ZnO nanoparticles alone in 50-hr incubation. In addition, the incubation period had a substantial impact on the suppression of Staphylococcus aureus bacteria growth by leather samples.
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