Synthesis of the hexaferrite semiconductor SrFe12O19 and its application in the photodegradation of Basic Red 46

Brahimi, Billal; Mekatel, Elhadj; Mellal, Mounir; Trari, M.

doi:10.1007/s10854-021-06314-6

Cited by 11 publications

(2 citation statements)

References 48 publications

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“…Figure 6 shows the Tauc calculation to obtain the following band gap energy values recorded for the samples SrM-SGP (2.5 eV) and SrM-SSR (2.1 eV), respectively, which are the minimum energies required to activate the samples [7,21,27,29,30]. The unique confinement of the samples is responsible for the variation in band gap energy.…”

Section: Evaluation Of Optical Propertiesmentioning

confidence: 99%

Photocatalytic activity of visible light active Sr-hexaferrite prepared by solid-state reaction and the pechini methods

Ayala,

Herrera-González,

Pérez-Juache

et al. 2023

Mater. Res. Express

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In this work, strontium hexaferrite (SrFe12O19) was prepared using two different methods, the solid-state reaction and the sol–gel pechini methods. In each case, the structural properties and microstructural features were analyzed in order to evaluate their influence on the photocatalytic activity of the strontium hexaferrite. In addition, the magnetic properties of each sample were also investigated. The analysis of the photocatalytic activity was done using methylene blue as a test dye. The results show that the fabrication method significantly impacts how the photocatalytic activity occurs. Firstly, the bandgap energy of the sample obtained by the solid-state reaction method turned out to be smaller than that obtained by the sol–gel pechini method. This behavior was attributed to the structural differences shown between the two samples. On the other hand, particle size also has a significant effect on photochemical reactions. However, smaller particle sizes make it difficult for photons to transport in the system, resulting in reduced photocatalytic activity. In this case, better results were obtained from the sample obtained from the solid-state reaction method.

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Section: Evaluation Of Optical Propertiesmentioning

confidence: 99%

Photocatalytic activity of visible light active Sr-hexaferrite prepared by solid-state reaction and the pechini methods

Ayala,

Herrera-González,

Pérez-Juache

et al. 2023

Mater. Res. Express

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show abstract

“…Traditional methods of water treatment cannot effectively eliminate pollutants from wastewaters and could cause great harm to the environment [1][2][3][4]. On the other hand, it has been shown that photocatalysis is a promising approach for the degradation of nonbiodegradable compounds in water [5,6]. It is based on a photocatalyst that can be activated by light such as sunlight and using this energy to remove various types of pollutants [7].…”

Section: Introductionmentioning

confidence: 99%

Structural and Optical Properties of Bi12NiO19 Sillenite Crystals: Application for the Removal of Basic Blue 41 from Wastewater

et al. 2021

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This article covers the structural and optical property analysis of the sillenite Bi12NiO19 (BNO) in order to characterize a new catalyst that could be used for environmental applications. BNO crystals were produced by the combustion method using Polyvinylpyrrolidone as a combustion reagent. Different approaches were used to characterize the resulting catalyst. Starting with X-ray diffraction (XRD), the structure was refined from XRD data using the Rietveld method and then the structural form of this sillenite was illustrated for the first time. This catalyst has a space group of I23 with a lattice parameter of a = 10.24 Å. In addition, the special surface area (SSA) of BNO was determined by the Brunauer-Emmett-Teller (BET) method. It was found in the range between 14.56 and 20.56 cm2·g−1. Then, the morphology of the nanoparticles was visualized by Scanning Electron Microscope (SEM). For the optical properties of BNO, UV-VIS diffusion reflectance spectroscopy (DRS) was used, and a 2.1 eV optical bandgap was discovered. This sillenite′s narrow bandgap makes it an effective catalyst for environmental applications. The photocatalytic performance of the synthesized Bi12NiO19 was examined for the degradation of Basic blue 41. The degradation efficiency of BB41 achieved 98% within just 180 min at pH ~9 and with a catalyst dose of 1 g/L under visible irradiation. The relevant reaction mechanism and pathways were also proposed in this work.

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Co-precipitation synthesis and characterization of the sillenite Bi12CoO20: application to photoactivity for water treatment on the heterojunction with ZnO

Madji,

Belmedani,

Mekatel

et al. 2023

J Mater Sci: Mater Electron

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Synthesis of the hexaferrite semiconductor SrFe12O19 and its application in the photodegradation of Basic Red 46

Cited by 11 publications

References 48 publications

Photocatalytic activity of visible light active Sr-hexaferrite prepared by solid-state reaction and the pechini methods

Photocatalytic activity of visible light active Sr-hexaferrite prepared by solid-state reaction and the pechini methods

Structural and Optical Properties of Bi12NiO19 Sillenite Crystals: Application for the Removal of Basic Blue 41 from Wastewater

Co-precipitation synthesis and characterization of the sillenite Bi12CoO20: application to photoactivity for water treatment on the heterojunction with ZnO

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