UV-light-induced photocatalytic response of Pechini sol–gel synthesized erbium vanadate nanostructures toward degradation of colored pollutants

Karami, Atefeh; Monsef, Rozita; Shihan, Mustafa Ridha; Qassem, Laith Yassen; Falah, Mayadah W.; Salavati‐Niasari, Masoud

doi:10.1016/j.eti.2022.102947

Cited by 38 publications

(11 citation statements)

References 44 publications

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“…Bacterial membrane potentials were measured by the fluorescent dye 3,3′-dihexyloxacarbocyanine iodide [DiOC 6 (3)], which binds to polarized membranes of active cells. 38 The dye was added to each sample fraction to a final concentration of 0.2 μM (1 mM stock solution in DMSO).…”

Section: Microcalorimetrymentioning

confidence: 99%

“…also promoted ROS production in several bacterial species, such as S. aureus, Enterococcus faecalis, and E. coli, and demonstrated their potential as a broad-spectrum antimicrobial material in medical applications. 7,53 Polarization of the bacterial membranes, a probe for cell integrity and stress, was studied via flow-cytometry using DiOC 6 (3). In Figure 2E,F, the membrane potential normalized to the untreated control (100%) is displayed over 48 h at a NP concentration of 100 μM.…”

Section: Figures 2 S4−s7)mentioning

confidence: 99%

“…Nanoparticles (NPs) are materials with dimensions between 1 and 100 nm for at least one of their cross-sectional diameters . Due to the increased surface-to-volume ratio compared to bulk materials, optical, physical, and chemical properties of NPs can be significantly altered, thereby, enabling unique applications in health and industry. , In this respect, metal NPs have previously been reported to exhibit antimicrobial activity. , Apart from titanium oxide, copper oxide, or zinc oxide, silver NPs (AgNPs) display the most investigated antimicrobial particles and are of growing interest for applications in medicine …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exploring Antibacterial Activity and Bacterial-Mediated Allotropic Transition of Differentially Coated Selenium Nanoparticles

Ruiz-Fresneda

Schaefer

Hübner

et al. 2023

ACS Appl. Mater. Interfaces

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The use of metal nanoparticles (NPs) as antimicrobial agents has become a promising alternative to the problem of antibiotic-resistant bacteria and other applications. Silver nanoparticles (AgNPs) are well-known as one of the most universal biocide compounds. However, selenium nanoparticles (SeNPs) recently gained more attention as effective antimicrobial agents. This study aims to investigate the antibacterial activity of SeNPs with different surface coatings (BSA-coated, chitosan-coated, and undefined coating) on the Gram-negative Stenotrophomonas bentonitica and the Gram-positive Lysinibacillus sphaericus in comparison to AgNPs. The tested NPs had similar properties, including shape (spheres), structure (amorphous), and size (50−90 nm), but differed in their surface charge. Chitosan SeNPs exhibited a positive surface charge, while the remaining NPs assayed had a negative surface charge. We have found that cell growth and viability of both bacteria were negatively affected in the presence of the NPs, as indicated by microcalorimetry and flow cytometry. Specifically, undefined coating SeNPs displayed the highest percentage values of dead cells for both bacteria (85−91%). An increase in reactive oxygen species (ROS) production was also detected. Chitosan-coated and undefined SeNPs caused the highest amount of ROS (299.7 and 289% over untreated controls) for S. bentonitica and L. sphaericus, respectively. Based on DNA degradation levels, undefined-SeNPs were found to be the most hazardous, causing nearly 80% DNA degradation. Finally, electron microscopy revealed the ability of the cells to transform the different SeNP types (amorphous) to crystalline SeNPs (trigonal/monoclinical Se), which could have environmentally positive implications for bioremediation purposes and provide a novel green method for the formation of crystalline SeNPs. The results obtained herein demonstrate the promising potential of SeNPs for their use in medicine as antimicrobial agents, and we propose S. bentonitica and L. sphaericus as candidates for new bioremediation strategies and NP synthesis with potential applications in many fields.

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Section: Microcalorimetrymentioning

confidence: 99%

Section: Figures 2 S4−s7)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exploring Antibacterial Activity and Bacterial-Mediated Allotropic Transition of Differentially Coated Selenium Nanoparticles

Ruiz-Fresneda

Schaefer

Hübner

et al. 2023

ACS Appl. Mater. Interfaces

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“…Several chemical approaches, such as advanced oxidation processes, ozonation, Fenton’s reagent, etc., and physical processes, namely, sedimentation, flocculation, adsorption, reverse osmosis, etc., are employed to remediate water bodies . Recently, photocatalysis has gained significant importance owing to its environmentally friendly process, where no additional energy is required during the degradation process. − Additionally, harvesting visible light for an efficient photoconversion process has gained tremendous scientific importance. From this point of view, nanostructures, that can efficiently absorb visible light and generate charge carriers, have shown promise toward enzymatic and chemical photoreactions. − Moreover, nanomaterials, in the form of zeolite, oxide, and sulfide synthesized by a variety of techniques, have shown potential for multifunctional modern-day applications. − However, the best photocatalysts should be abundant, inexpensive, safe, extremely durable, and reusable.…”

Section: Introductionmentioning

confidence: 99%

Sodium Alginate–CuS Nanostructures Synthesized at the Gel–Liquid Interface: An Efficient Photocatalyst for Redox Reaction and Water Remediation

2023

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The use of visible light to propel chemical reactions is an exciting area of study that is crucial in the current socioeconomic environment. However, various photocatalysts have been developed to harness visible light, which consume high energy during synthesis. Thus, synthesizing photocatalysts at gel–liquid interfaces in ambient conditions is of scientific importance. Herein, we report an environmentally benign sodium alginate gel being used as a biopolymer template to synthesize copper sulfide (CuS) nanostructures at the gel–liquid interface. The driving force for the synthesis of CuS nanostructures is varied by changing the pH of the reaction medium (i.e., pH 7.4, 10, and 13) to tailor the morphology of CuS nanostructures. The CuS nanoflakes obtained at pH 7.4 transform into nanocubes when the pH is raised to 10, and the nanostructures deform at the pH of 13. Fourier transform infrared spectroscopy (FTIR) confirms all the characteristic stretching of sodium alginate, whereas the CuS nanostructures are crystallized in a hexagonal crystal system, as revealed by the powder X-ray diffraction analysis. The high-resolution X-ray photoelectron spectroscopy (XPS) spectra show the +2 and −2 oxidation states of copper (Cu) and sulfur (S) ions, respectively. The CuS nanoflakes physisorbed a higher concentration of greenhouse CO2 gas. Owing to a lower band gap of CuS nanoflakes synthesized at a pH of 7.4, compared to other CuS nanostructures prepared at pH 10 and 13, CuS photocatalytically degrades 95% of crystal violet and 98% of methylene blue aqueous dye solutions in 60 and 90 min, respectively, under blue light illumination. Additionally, sodium alginate–copper sulfide (SA-CuS) nanostructures synthesized at a pH of 7.4 demonstrate excellent performance in photoredox reactions to convert ferricyanide to ferrocyanide. The current research opens the door to developing new photocatalytic pathways for a wide range of photochemical reactions involving nanoparticle-impregnated alginate composites prepared on gel interfaces.

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“…Among the previous studies, the catalytic efficiency for prepared photocatalysts was low, − fewer influencing variables were explored, and their performance was not explored to the maximum extent. , Salavati-Niasari et al and Mir et al − only explored the changes in their structure through a series of characterization tools but did not apply them to practical experiments. The catalytic mechanism described by Amiri et al was not sufficiently detailed.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Visible-Light-Driven Mn_0.2Cd_0.8S/g-C₃N₄ Heterojunction for the Photodegradation of Highly Toxic Tetracycline Antibiotics

Gao

2023

Ind. Eng. Chem. Res.

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With the rapid advancement of modern science and technology, the damage of antibiotics to human health and ecosystem has aroused widespread concern. In this study, a Mn 0.2 Cd 0.8 S/g-C 3 N 4 type II heterojunction was prepared. The effects of different loading ratios, catalyst dosage, and pH on the photocatalytic functions of the composites were investigated. When the additive dosage of 10% Mn 0.2 Cd 0.8 S/g-C 3 N 4 was 1.20 g/ L, and the pH of the tetracycline (TC) solution was 5, the photodegradation rate of TC (10 mg/L) was 98.4% under the irradiation of visible light for 120 min. After four cycles, the photodegradation rate of 10% Mn 0.2 Cd 0.8 S/g-C 3 N 4 reached 96.8%, indicating good stability and recoverability. Furthermore, the study found that •O 2 − was the dominant active species leading to the decolorization of TC in the process of photocatalysis. Based on its excellent photodegradation rate and great cycle utilization rate, the Mn 0.2 Cd 0.8 S/g-C 3 N 4 composite provided a promising suggestion for photocatalytic degradation of antibiotics.

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UV-light-induced photocatalytic response of Pechini sol–gel synthesized erbium vanadate nanostructures toward degradation of colored pollutants

Cited by 38 publications

References 44 publications

Exploring Antibacterial Activity and Bacterial-Mediated Allotropic Transition of Differentially Coated Selenium Nanoparticles

Exploring Antibacterial Activity and Bacterial-Mediated Allotropic Transition of Differentially Coated Selenium Nanoparticles

Sodium Alginate–CuS Nanostructures Synthesized at the Gel–Liquid Interface: An Efficient Photocatalyst for Redox Reaction and Water Remediation

Highly Efficient Visible-Light-Driven Mn_0.2Cd_0.8S/g-C₃N₄ Heterojunction for the Photodegradation of Highly Toxic Tetracycline Antibiotics

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UV-light-induced photocatalytic response of Pechini sol–gel synthesized erbium vanadate nanostructures toward degradation of colored pollutants

Cited by 38 publications

References 44 publications

Exploring Antibacterial Activity and Bacterial-Mediated Allotropic Transition of Differentially Coated Selenium Nanoparticles

Exploring Antibacterial Activity and Bacterial-Mediated Allotropic Transition of Differentially Coated Selenium Nanoparticles

Sodium Alginate–CuS Nanostructures Synthesized at the Gel–Liquid Interface: An Efficient Photocatalyst for Redox Reaction and Water Remediation

Highly Efficient Visible-Light-Driven Mn0.2Cd0.8S/g-C3N4 Heterojunction for the Photodegradation of Highly Toxic Tetracycline Antibiotics

Contact Info

Product

Resources

About

Highly Efficient Visible-Light-Driven Mn_0.2Cd_0.8S/g-C₃N₄ Heterojunction for the Photodegradation of Highly Toxic Tetracycline Antibiotics