Semiconductor supported by palygorskite and layered double hydroxides clays to dye discoloration in solution by a photocatalytic process

Morais, Alan Ícaro Sousa; Oliveira, Wemerson Vieira de; Oliveira, Vaeudo V.; Honorio, Luzia M. C.; Araújo, Francisca Pereira de; Bezerra, Roosevelt D.S.; Fechine, Pierre Basílio Almeida; Viana, Bartolomeu C.; Furtini, Marcelo Barbosa; Filho, Edson Cavalcanti da Silva; Osajima, Josy A.

doi:10.1016/j.jece.2019.103431

Cited by 22 publications

(2 citation statements)

References 131 publications

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“…GKT was synthesized by the sol-gel method as previously reported [25,27,29] with some modifications. More detail about this modification is provided in the supplementary materials.…”

Section: Synthesis Of Tio 2 /Karaya Composite (Gkt)mentioning

confidence: 99%

TiO2/Karaya Composite for Photoinactivation of Bacteria

et al. 2022

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A TiO2/Karaya composite was synthesized by the sol-gel method for the photoinactivation of pathogens. This is the first time that we have reported this composite for an antimicrobial approach. The structure, morphology, and optical properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-rays (EDS), Fourier transform infrared spectroscopy (FTIR), and diffuse reflectance, and the surface area was characterized by the BET method. The XRD and EDS results showed that the TiO2/Karaya composite was successfully stabilized by the crystal structure and pore diameter distribution, indicating a composite of mesoporous nature. Furthermore, antibacterial experiments showed that the TiO2/Karaya composite under light was able to photo-inactivate bacteria. Therefore, the composite is a promising candidate for inhibiting the growth of bacteria.

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“…GKT was synthesized by the sol-gel method as previously reported [25,27,29] with some modifications. More detail about this modification is provided in the supplementary materials.…”

Section: Synthesis Of Tio 2 /Karaya Composite (Gkt)mentioning

confidence: 99%

TiO2/Karaya Composite for Photoinactivation of Bacteria

et al. 2022

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“…When the semiconductor absorbs radiation, the valence band electron jumps to the conduction band, generating an electron–hole pair. This pair is responsible for the formation of important oxygenated radicals, mainly hydroxyl radicals, which attack the pollutant molecule [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Photoresponsive Activity of the Zn0.94Er0.02Cr0.04O Compound with Hemisphere-like Structure Obtained by Co-Precipitation

et al. 2023

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In this work, a ZnO hemisphere-like structure co-doped with Er and Cr was obtained by the co-precipitation method for photocatalytic applications. The dopant’s effect on the ZnO lattice was investigated using X-ray diffraction, Raman, photoluminescence, UV-Vis and scanning electron microscopy/energy dispersive spectroscopy techniques. The photocatalytic response of the material was analyzed using methylene blue (MB) as the model pollutant under UV irradiation. The wurtzite structure of the Zn0.94Er0.02Cr0.04O compound presented distortions in the lattice due to the difference between the ionic radii of the Cr3+, Er3+ and Zn2+ cations. Oxygen vacancy defects were predominant, and the energy competition of the dopants interfered in the band gap energy of the material. In the photocatalytic test, the MB degradation rate was 42.3%. However, using optimized H2O2 concentration, the dye removal capacity reached 90.1%. Inhibitor tests showed that •OH radicals were the main species involved in MB degradation that occurred without the formation of toxic intermediates, as demonstrated in the ecotoxicity assays in Artemia salina. In short, the co-doping with Er and Cr proved to be an efficient strategy to obtain new materials for environmental remediation.

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Micro flowers composed of nanosheets Ag salts composite as n-p type semiconductor: an efficient photocatalyst under visible irradiation

Karimi

Rafiee

2022

J Mater Sci: Mater Electron

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Semiconductor supported by palygorskite and layered double hydroxides clays to dye discoloration in solution by a photocatalytic process

Cited by 22 publications

References 131 publications

TiO2/Karaya Composite for Photoinactivation of Bacteria

TiO2/Karaya Composite for Photoinactivation of Bacteria

Photoresponsive Activity of the Zn0.94Er0.02Cr0.04O Compound with Hemisphere-like Structure Obtained by Co-Precipitation

Micro flowers composed of nanosheets Ag salts composite as n-p type semiconductor: an efficient photocatalyst under visible irradiation

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