Antimicrobial Activity of TiO2 NPs against   Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923

Abbas, Ruaa H.; Haleem, Azhar M.; Hamid, Mazin K.; Kadhim, A.; Jawad, Raad S.

doi:10.24842/1611/0017

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…Based on results obtained from the graphs, the ratios 1:1 and 1:2 were the most effective at removing E. coli and S. aureus, respectively. It Should be noted that S. aureus is more susceptible to excess zinc oxide nanoparticles in ratio 1:2 42,43 and also E. coli is more susceptible to titanium dioxide nanoparticles in a ratio of 1:1 44 . The photocatalytic activity of TiO 2 -ZnO binary oxide with different molar ratio of TiO 2 and…”

Section: Introductionmentioning

confidence: 99%

Antibacterial activity of Clinoptilolite/TiO 2 /ZnO photocatalyst against Escherichia coli and Staphylococcus aureus in water resources

Abdi

Anbia

safavi

et al. 2023

Preprint

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Water treatment is crucial due to rising water demand across the board, including drinking, agriculture, industry, etc. Pathogens are a type of contamination that must be studied to improve water purification methods. This study investigates the elimination of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) using Clinoptilolite/TiO2/ZnO nanocomposite with varied TiO2/ZnO ratios of 1:1, 1:2, and 2:1 under UVA and UVC light irradiation. To synergize the effect of coupling TiO2 with ZnO, we synthesized nanocomposite Clinoptilolite/TiO2/ZnO to make a powerful system for water and wastewater disinfection. The characterization tests, including X-ray diffraction, field emission scanning electron microscopy, X-ray energy diffraction, Fourier-transform infrared spectroscopy, diffuse reflection spectroscopy, and nitrogen adsorption-desorption, were performed to confirm the structure. The optimum response for bacterial removal was found by using the determination-optimal (D-optimal) design of response surface methodology (RSM). 100% removal was obtained for E. coli and S. aureus under UVA irradiation and contact time of 100 min for both of them.

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Section: Introductionmentioning

confidence: 99%

Antibacterial activity of Clinoptilolite/TiO 2 /ZnO photocatalyst against Escherichia coli and Staphylococcus aureus in water resources

Abdi

Anbia

safavi

et al. 2023

Preprint

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“…However, this bacterium is clinically vital in dentistry [6][7][8]. Resistant bacteria are spreading worldwide, endangering antibiotic efficacy [9,10]. Smaller nanoparticles seem to penetrate bacteria better.…”

Section: Introductionmentioning

confidence: 99%

The Antibacterial Activities of Copper Oxide Nanoparticles Synthesized Using Laser Ablation in Different Surfactants against Streptococcus mutans

Abbas¹,

Kadhim²,

Haleem³

2023

Journal of Renewable Materials

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Copper oxide nanoparticles (CuO NPs) were synthesised with laser ablation of a copper sheet immersed in deionized water (DW), cetrimonium bromide (CTAB), and sodium dodecyl sulphate (SDS), respectively. The target was irradiated with a pulsed Nd: YAG laser at 1064 nm, 600 mJ, a pulse duration of 10 ns, and a repetition rate of 5 Hz. The CuO NPs colloidal were analyzed using UV-Vis spectroscopy, the Fourier transform infrared (FTIR) spectrometer, zeta potential (ZP), X-ray diffraction (XRD), transmission electron microscope (TEM) and field emission scanning electron microscopy (FESEM). The absorption spectra of CuO NPs colloidal showed peaks at 214, 215 and 220 nm and low-intensity peaks at 645, 650 and 680 nm for SDS, CTAB and DW, respectively. CuO NPs' colloidal results are (−21.6, 1.2, and 80 mV) for negatively, neutrally, and positively charged SDS, DW, and CTAB, respectively. The XRD pattern of the NPs revealed the presence of CuO phase planes (110) ( 111), (20-2) and (11-1). The TEM images revealed nearly spherical NPs, with sizes ranging from 10-90, 10-50, and 10-210 nm for CuO NPs mixed with DW, SDS and CTAB, respectively. FESEM images of all the synthesized samples illustrate the formation of spherical nanostructure and large particles are observable. The CuO NPs were tested for antibacterial activity against Streptococcus mutans by using the well diffusion method. In this method, CuO NPs prepared in DW at a concentration of 200 μg/mL showed a greater inhibition zone against Streptococcus mutans.

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“…Sequence of energy transformations occur when laser radiation is absorbed by a metal surface and interacts with the lattice, these include the sequence of relaxation and excitation electrons. The diffused heat through the metal target that is induced by nanosecondpulsed laser ablation, occurs on a time range shorter than the pulse width [13,14]. Metal fragments with large kinetic energy are ejected from the solid surface when the laser energy interacts with the liquid-solid interface and due to the confined liquid, the ejected fragments form an ionic region in the nearby region of the liquid-solid interface (plasma plum formation) [15].…”

Section: Introductionmentioning

confidence: 99%

X-Ray Fluorescence of Copper, Nickle and Zinc Nanoparticles in Motor Oil Prepared by Laser Treatment

Kadhim

Al-Amiery

2021

ARFMTS

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This paper represents an attempt to link different techniques such as laser and X-ray fluorescence (XRF). Where we used the laser in preparation and used X-rays to diagnose and analyze for non-traditional samples. The experimental procedure of the LSP is done by using a convergent lens to deliver 600 mJ (1064 nm) of energy and 10 ns laser pulse produced by Q-switched Nd:YAG laser of 1.5 mm spot size in diameter. Doubled distilled deionized water (DDDW) of 3 mm depth is used as transparent confining layer. X-Ray fluorescence technique used to analyze and determine the concentration of different nanoparticles suspended in motor oil. The results showed the accuracy in XRF measurements. the results of the motor oil analysis for Cu, Ni and Zn were 0.1225, 0.0480 and 0.000 weight percent respectively. Maximum relative error between actual measurements and XRF measurements were 6.5%, 10% and 12.5 for Cu, Ni and Zn nanoparticles respectively. The best percentage of suspension is 0.01 wt.%.

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Antimicrobial Activity of TiO2 NPs against Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923

Cited by 4 publications

References 22 publications

Antibacterial activity of Clinoptilolite/TiO 2 /ZnO photocatalyst against Escherichia coli and Staphylococcus aureus in water resources

Antibacterial activity of Clinoptilolite/TiO 2 /ZnO photocatalyst against Escherichia coli and Staphylococcus aureus in water resources

The Antibacterial Activities of Copper Oxide Nanoparticles Synthesized Using Laser Ablation in Different Surfactants against Streptococcus mutans

X-Ray Fluorescence of Copper, Nickle and Zinc Nanoparticles in Motor Oil Prepared by Laser Treatment

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