High performance of pyrochlore like Sm2Ti2O7 heterojunction photocatalyst for efficient degradation of rhodamine-B dye with waste water under visible light irradiation

Kaviyarasu, K.; Magdalane, C. Maria; Jayakumar, D.; Samson, Y.; Bashir, A.K.H.; Mâaza, M.; Letsholathebe, Douglas; Mahmoud, Ahmed Hossam; Kennedy, J.

doi:10.1016/j.jksus.2019.12.006

Cited by 167 publications

(27 citation statements)

References 23 publications

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“…Under the influence of light, electron acceptor or donor sites react with O 2 to produce O 2 ·− 48‐49 which ultimately attacks the pathogens. For production of ROS‐based radicals point of zero zeta potential (PZZP), conduction band ( E c ), valance band energy ( E v ), and n‐type nature of ZnO are critical to predict the reduction of O 2 /O 2 ·− and 1 O 2 /O 2 50 .…”

Section: Discussionmentioning

confidence: 99%

In vitro antibacterial response of ZnO‐MgO nanocomposites at various compositions

Amir

Bibi

Nawaz

et al. 2021

Int J Applied Ceramic Tech

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ZnO‐MgO nanocomposites were prepared by a co‐precipitation method and afterward compared with pristine ZnO and MgO accordingly. XRD and EDX spectra were used to confirm the crystal structure and crystallite size of these materials. X‐ray diffraction analysis shows that antibacterial activity of ZnO:MgO composite enhances with crystallite size reduction ~1.34 times in comparison to pristine ZnO or MgO specimens, accompanied by domination of defect generation over defect annihilation activity. Besides, average particle sizes also reduce to ~2 times at 1:3 MgO/ZnO composite in comparison to MgO. The particle size of ZnO was substantially higher due to rod‐like morphology. Moreover, the minimum inhibitory concentration outcomes also show that ZnO‐MgO composites are more effective against gram‐negative pathogens in appropriate ratios (ZnO:MgO) of 1:3 and 3:1 with the concentration of 15,000 µg/ml. Similarly, gram‐positive pathogens were In contrast, ZnO and MgO separately or in 1:1 composite ratio does not prove considerably effective on all the five microbes (required higher >25,000 µg/ml) MIC to counter gram‐negative pathogens. Additionally, lower doses of 3ZnO:1MgO and 1ZnO:3MgO ~5000 µg/ml composite nanoparticles are effective on gram‐positive pathogens. Similarly, 3ZnO:1MgO composition proved highly productive at a much lower concentration, that is, 12500 ≤ X ≤ 15000 to counter gram‐negative pathogens. Besides, 1ZnO:3MgO is effective against gram‐negativepathogens at MIC ranging from 12500 ≤ X ≤ 15000 µg/ml.

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Section: Discussionmentioning

confidence: 99%

In vitro antibacterial response of ZnO‐MgO nanocomposites at various compositions

Amir

Bibi

Nawaz

et al. 2021

Int J Applied Ceramic Tech

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“…Rare earth metal oxide nanoparticles are extensively studied in the field of nanomaterials due to their peculiar nanostructures, optical, electronic, and catalytic properties [1]. All these features are favorable to several technological applications like as optical communication, optical display device, photocatalytic, medical diagnosis, and UV shielding [1][2][3][4][5][6][7]. In addition, Fluorescent based nanomaterials versatile role in the area of UV and visible light emission devices [8,9].…”

Section: Introductionmentioning

confidence: 99%

Influence of pH on Structural, Morphological, Optical, Photocatalytic, and Antibacterial Properties of Yttrium Oxide Nanoparticles via Co-Precipitation Method

Parangusan¹,

Subramanium²,

Sundarabharathi³

et al. 2021

Preprint

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Yttrium oxide nanoparticles with multiform morphologies have been synthesized by the co-precipitation method. The structure, morphology, functional groups, optical and photoluminescence properties were examined through X-ray diffraction (XRD), Scanning electron microscope (SEM), Fourier transform infrared spectrometer (FTIR), UV-Visible (UV-Vis), Photoluminescence spectra (PL). The XRD patterns obtained for the samples synthesized at various pH values confirmed the cubic structure of Y2O3. The patterns obtained on the samples at pH values of 8 and 9 appeared as have sharp peaks suggested, that the samples were well crystallized. From UV-vis spectra, it revealed that the bandgap energy exhibits a blue shift in the absorption edge for the samples with the increase of pH due to their changing morphologies and surface structures. In the PL spectra, the obtained Y2O3 samples demonstrate an intense and bright UV and blue emission under the excitation wavelength range of 250 nm. The photocatalytic degradation of the Y2O3 nanostructure was studied against the Methylene blue (MB) dye under sunlight irradiation. The results showed good recital under solar light irradiation. Further, the antimicrobial activities of Y2O3 nanostructure against foodborne pathogens (Staphylococcus aureus and Salmonella typhi) were examined by using the disc diffusion method. Moreover, the Y2O3 nanostructure was found to be biocompatible.

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“…In response to the search for safe and efficient techniques, photocatalysis, due to its potential for converting solar energy to pollutant degradation, has attracted the attention of researches due to the possibility of developing advanced "green" oxidation technologies, being used in studies aimed at water disinfection [21][22][23][24][25][26][27][28]. Besides, it shows benefits in relation to ozonization and disinfection of water by UV irradiation, which, although they are promising [29][30][31], they are substantially complex techniques due to the risk of formation of potentially harmful byproducts [32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Microorganisms Photocatalytic Inactivation on Ag3PO4 Sub-Microcrystals Under WLEDs Light Source

Cruz-Filho

Costa

Lima

et al. 2021

J Inorg Organomet Polym

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In this article, we report the silver orthophosphate (Ag3PO4) photocatalytic inactivation properties on strains Gram-positive Saprophyte B. subtilis, a diploid fungus Candida albicans and Gram-negative Pseudomonas aeruginosa, using as irradiation source white-light-emitting diodes (WLEDs) with luminous flux ( v) of 1.3 x 10 3 Lumens and relative power density of 15 mW m -2 . Microorganisms death curves and the kinetic constants (Kd) indicated that the inhibitory effect of the Ag3PO4 under WLEDs irradiation is well pronounced to C. albicans (6.6 x 10 -2 min -1 ) in relation to P. augenosas (4.6 x 10 -2 min -1 ) and B. subitilis (2.5 x 10 -2 min -1 ). Decimal reduction time (Dt) were 34.4 min to C. albicans, 50.1 min P. augenosas and 92.1 min to B.subitilisThe micrographs obtained by scanning electron microscopy with field emission gun (SEM-FEG) demonstrated that there was cell wall permeability and consequently total rupture in the C. albicans, suggesting the lipid peroxidation phenomenon and protein oxidation promoted by the presence of reactive oxygen species (ROS). Furthermore, it was observed the Ag3PO4 when irradiated by WLEDs demonstrates important sporicidal activity in related to B. subtilis, promoting the endospore wall rupture.

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High performance of pyrochlore like Sm2Ti2O7 heterojunction photocatalyst for efficient degradation of rhodamine-B dye with waste water under visible light irradiation

Cited by 167 publications

References 23 publications

In vitro antibacterial response of ZnO‐MgO nanocomposites at various compositions

In vitro antibacterial response of ZnO‐MgO nanocomposites at various compositions

Influence of pH on Structural, Morphological, Optical, Photocatalytic, and Antibacterial Properties of Yttrium Oxide Nanoparticles via Co-Precipitation Method

Microorganisms Photocatalytic Inactivation on Ag3PO4 Sub-Microcrystals Under WLEDs Light Source

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