Influence of magnesium doping on microstructure, optical and photocatalytic activity of zinc oxide thin films synthesis by sol–gel route

Ameur, Imene; Boudine, B.; Laidoudi, Mouloud; Khennoucha, Malak; Brien, Valérie; Horwat, David; Sebais, M.; Halimi, O.

doi:10.1007/s00339-021-04486-w

Cited by 16 publications

(2 citation statements)

References 40 publications

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“…The MB concentration was calculated thanks to a calibration curve linking the concentration to the optical absorbance. The percentage degradation of MB can be expressed by the equation below [29,30]…”

Section: Photocatalysis Measurementsmentioning

confidence: 99%

Effects of Erbium Incorporation on Structural, Surface Morphology, and Degradation of Methylene Blue Dye of Magnesium Oxide Nanoparticles

Ameur

Khantoul

Boudine

et al. 2022

J Inorg Organomet Polym

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This paper reports the chemical synthesis of MgO and Er-doped MgO nanoparticles (NPs) by the sol-gel method. Their microstructural, optical characterization and the evaluation of their photocatalytic activity are presented. The synthesized NPs were characterized by means of Xray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Environmental Scanning Electron Microscopy (ESEM), Transmission Electron Microscopy (TEM), Energy Dispersive X-ray Spectroscopy (EDX), UV-visible and Photoluminescence (PL) spectroscopy. The effective synthesis of cubic MgO compound is attested by XRD, FTIR and electron diffraction in TEM. Er 2 O 3 cubic secondary phase is found in the 2 and 3 wt. % Erdoped MgO samples. The average size of the roundish cuboid-shaped crystallites decreases from 50 nm to 32 nm upon the incorporation of the rare earth element (TEM, XRD).Concomitantly, the size of flakes in which the NPs do agglomerate follows the same trend (ESEM). UV-Visible results show that the calculated band-gap energy of the NPs was in the 5.23 to 5.35 eV range. PL analysis showed that all samples have visible emissions owing to the formation of defects in the MgO band-gap. The photocatalytic activity against methylene blue dye was evaluated under UV light irradiation. The photocatalytic results showed an improvement in degradation efficiency with the addition of erbium in samples, with a maximal MB dye removal for the 3 wt. % Er-doped MgO sample after 90 min irradiation. The performance is ascribed to a higher separation of the photo-generated (electron-hole) and larger surface area.

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Section: Photocatalysis Measurementsmentioning

confidence: 99%

Effects of Erbium Incorporation on Structural, Surface Morphology, and Degradation of Methylene Blue Dye of Magnesium Oxide Nanoparticles

Ameur

Khantoul

Boudine

et al. 2022

J Inorg Organomet Polym

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“…Zinc oxide is a n-type semiconductor with a large band gap of about 3.37 eV as well as a wide exciton binding efficiency of about 60 meV [1][2][3], hence creating exciton balance at room temperature [4,5]. Mostly it is found in hexagonal wurtzite form [6].…”

Section: Introductionmentioning

confidence: 99%

Probing the impact of Ba on properties of ZnO at the nanoscale: optical, dielectric and antibacterial activity evolution

Kayani,

Farid,

Bashir

et al. 2024

Phys. Scr.

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The sol-gel dip coating technique was used to manufacture undoped and Barium doped zinc oxide thin films. Doping is extensively used to refine semiconductor properties. Without and with varying ratios of Ba 1-9 wt.% dopant, ZnO thin films have been manufactured. The effect of Ba on the dielectric, structural, antibacterial, optical and morphological characteristics of ZnO was investigated. The optical properties demonstrate that the bandgap of the pure ZnO thin film is higher than that of Ba-doped ZnO films, which is beneficial for improving solar cell performance. According to the XRD data, all films of ZnO have hexagonal wurtzite structures According to XRD structural analysis; the incorporation of Ba lowers the crystallinity of ZnO thin films by reducing the crystallite size. The Ba doping changes the surface roughness and morphology. The hopping process defines the dielectric characteristics that follow Koop’s theory as well as the Maxwell-Wagner model. A lower dielectric constant makes it ideal for high-frequency devices. These films exhibit ferromagnetism. Barium-doped zinc oxide photocatalyst could successfully decompose methylene blue dye by making it suitable for wastewater treatment.Ba doping effectively kills both gram-negative and gram-positive bacteria. They have antimicrobial applications in the food industry and biomedicine.

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Green Engineering of Silicon and Titanium Dioxide Architectures and Realizing Downstream Applications

Dirkzwager,

Mallee,

Groeneveld

et al. 2024

Advanced Sustainable Systems

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Biomineralization has long been a source of inspiration and frustration for researchers in a wide variety of disciplines from ecologists and dental practitioners to materials scientists. An amazing variety of organisms have the capacity to produce inorganic mineral complexes through biomineralization. In this context, different organisms use proteins, peptides, and polysaccharides as templates to control the nucleation, growth, and morphology of structures containing minerals and metals. Due to lack of clarity in the field, distinctions are provided between the various biomineralization processes as Type I, II, and III biomineralization. Synthetic biomineralization is an emerging field in which these processes are applied to unnatural substrates to create useful inorganic materials with applications in a variety of fields. A comprehensive overview of silica and titanium oxide biomineralization is given, covering the major achievements this sub‐field has attained since its emergence. The ground‐breaking discoveries are focused based on the templating agent used and the mechanisms that are proposed in the field are discussed. Synthetic biomineralization are led, which are more recently demonstrated to have feasible applications in energy, electronics, construction, and biotechnology. These possibilities are discussed alongside prospects based on the current trend of research in the field.

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Influence of magnesium doping on microstructure, optical and photocatalytic activity of zinc oxide thin films synthesis by sol–gel route

Cited by 16 publications

References 40 publications

Effects of Erbium Incorporation on Structural, Surface Morphology, and Degradation of Methylene Blue Dye of Magnesium Oxide Nanoparticles

Effects of Erbium Incorporation on Structural, Surface Morphology, and Degradation of Methylene Blue Dye of Magnesium Oxide Nanoparticles

Probing the impact of Ba on properties of ZnO at the nanoscale: optical, dielectric and antibacterial activity evolution

Green Engineering of Silicon and Titanium Dioxide Architectures and Realizing Downstream Applications

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