Group V Elements (V, Nb and Ta) Doped CeO2 Particles for Efficient Photo-Oxidation of Methylene Blue Dye

Chanu, Wairakpam Chinglembi; Gupta, Aayush; Singh, Mahesh Kumar; Pandey, O.P.

doi:10.1007/s10904-020-01822-0

Cited by 15 publications

(5 citation statements)

References 64 publications

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“…Moreover, broadening of diffraction peaks has also been observed exhibiting smaller crystallite size and increased lattice distortion. [ 29 ] With the help of Scherrer criteria, average crystallite size of all the samples was calculated and a decreasing trend has been detected with increasing Al concentration as given in Table 2 . Further to determine the detailed crystallographic information, the diffraction data was refined by Rietveld refinement with the help of FullProf software and the refined data is shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Investigation of Structural, Optical, and Antifungal Characteristics of Al‐Doped MnFe₂O₄ Ferrite Nanoparticles

Sharma,

Gupta,

Bhardwaj

et al. 2024

Physica Status Solidi (a)

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In present study, a series of MnAlxFe2−xO4 (x = 0.1, 0.2, 0.3) ferrite nanoparticles are synthesized via auto‐combustion method and investigated for the structural, optical, and antifungal characteristics. X‐ray diffraction and transmission electron microscopy are employed to analyze the structure and morphology, revealing alterations in the lattice parameters and crystallite size (24.83–17.95 nm) due to Al doping. The optical properties of the synthesized nanoparticles are examined through UV–visible spectroscopy, indicating a decrease in the bandgap energy (1.44–1.33 eV) with the incorporation of Al3+ ions. Additionally, the antifungal activity of the Al‐doped MnFe2O4 nanoparticles is assessed against two selected fungal strains, i.e., Aspergillus niger (MTCC 282) and Candida albicans (MTCC 227). The findings contribute to the understanding of the multifaceted properties of Al‐doped MnFe2O4, highlighting its potential applications in diverse fields such as sensors, and biomedical research.

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Section: Resultsmentioning

confidence: 99%

Investigation of Structural, Optical, and Antifungal Characteristics of Al‐Doped MnFe₂O₄ Ferrite Nanoparticles

Sharma,

Gupta,

Bhardwaj

et al. 2024

Physica Status Solidi (a)

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“…Their application makes it possible to avoid the use of auxiliary and intermediate substances in the synthesis, reduces the number of process steps, etc. Different photocatalytic reactions, such as water splitting [ 3 , 4 , 5 , 6 , 7 ], the degradation of organic substances in aqueous solutions [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ], and polymerization [ 21 , 22 , 23 , 24 ], have been intensively studied. The use of photocatalysis for obtaining biomedical materials based on natural polymers is an especially attractive area of research.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Synthesis of Materials for Regenerative Medicine Using Complex Oxides with β-pyrochlore Structure

Семенычева

Chasova

Fukina

et al. 2023

Life

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Graft copolymerization of methyl methacrylate onto cod collagen was carried out under visible light irradiation (λ = 400–700 nm) at 20–25 °C using the RbTe1.5W0.5O6, CsTeMoO6, and RbNbTeO6 complex oxides with β-pyrochlore structure as photocatalysts. The as-prepared materials were characterized by X-ray diffraction, scanning electron microscopy, and UV-Vis diffuse reflectance spectroscopy. It was also found that RbNbTeO6 with β-pyrochlore structure was not able to photocatalyze the reaction. Enzymatic hydrolysis of the obtained graft copolymers proceeds with the formation of peptides with a molecular weight (MW) of about 20 and 10 kDa. In contrast to collagen, which decomposes predominantly to peptides with MW of about 10 kDa, the ratio of fractions with MW of about 10 kDa and 20 kDa differs much less, their changes are symbatic, and the content of polymers with MW of more than 20 kDa is about 70% after 1 h in the case of graft copolymers. The data obtained indicate that synthetic fragments grafted to the collagen macromolecule do not prevent the hydrolysis of the peptide bonds but change the rate of polymer degradation. This is important for creating network matrix scaffolds based on graft copolymers by cross-linking peptides, which are products of enzymatic hydrolysis.

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“…It is due to the presence of variety active particles in the reaction volume: charged particles, radicals, singlet oxygen, hydrogen peroxide, capable of destroying organic compounds. Significant progress has been recently reached in this direction [1,[6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

The effect of methyl methacrylate transformations during photocatalysis in the presence of RbTe1.5W0.5O6 on the change of the complex oxide surface

Chasova

Fukina

Boryakov

et al. 2022

Izvestiâ vuzov. Prikladnaâ himiâ i biotehnologiâ

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The features of the surface changes of the RbTe1.5W0.5O6 photocatalyst during polymerization processes involving methyl methacrylate (MMA) under irradiation with visible light λ= 400–700 nm at a temperature of 20–25 °C, as well as regeneration conditions for its reuse, have been studied. The realization of a chemical reaction in a mixture of a photocatalyst and a monomer is determined by its kinetic parameters and the concentration of reacting particles. The formation of OH• radicals, which are active in radical polymerization, occurs in this case by both ways: interacting between water molecules adsorbed on the surface, as well as during the recovery of oxygen dissolved in water. Due to the high reactivity of the hydroxyl radical, an active process of radical polymerization of MMA could be expected. However, the formation of polymethyl methacrylate (PMMA) in the reaction takes place with a low conversion – the formation of 5–10% polymer, which is related to changes on the surface of the complex oxide RbTe1.5W0.5O6 during the reaction. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) methods have been used to investigate the catalyst surface. The presence of organic and polymer substrates was revealed on the catalyst surface after the reaction. As a result of the catalyst treatment by ultrasound in an aqueous emulsion, polymer macromolecules are not identified on the surface, but chemically adsorbed monomer and oligomers formed under the ultrasound destruction of the polymer are presented. Other methods of cleaning the catalyst surface by washing in different solutions as chloroform and tetrahydrofuran also are not effective and cause the adsorbates transformations on the surface. It leads to decreasing the RbTe1.5W0.5O6 catalyst's activity for repeated polymerization. Thus, to successful regeneration of the catalyst's powder not only ultrasound treatment is required, but also heating it at 300–400 °C to remove organic substrates.

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Group V Elements (V, Nb and Ta) Doped CeO2 Particles for Efficient Photo-Oxidation of Methylene Blue Dye

Cited by 15 publications

References 64 publications

Investigation of Structural, Optical, and Antifungal Characteristics of Al‐Doped MnFe₂O₄ Ferrite Nanoparticles

Investigation of Structural, Optical, and Antifungal Characteristics of Al‐Doped MnFe₂O₄ Ferrite Nanoparticles

Photocatalytic Synthesis of Materials for Regenerative Medicine Using Complex Oxides with β-pyrochlore Structure

The effect of methyl methacrylate transformations during photocatalysis in the presence of RbTe<sub>1.5</sub>W<sub>0.5</sub>O<sub>6</sub> on the change of the complex oxide surface

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Group V Elements (V, Nb and Ta) Doped CeO2 Particles for Efficient Photo-Oxidation of Methylene Blue Dye

Cited by 15 publications

References 64 publications

Investigation of Structural, Optical, and Antifungal Characteristics of Al‐Doped MnFe2O4 Ferrite Nanoparticles

Investigation of Structural, Optical, and Antifungal Characteristics of Al‐Doped MnFe2O4 Ferrite Nanoparticles

Photocatalytic Synthesis of Materials for Regenerative Medicine Using Complex Oxides with β-pyrochlore Structure

The effect of methyl methacrylate transformations during photocatalysis in the presence of RbTe<sub>1.5</sub>W<sub>0.5</sub>O<sub>6</sub> on the change of the complex oxide surface

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Investigation of Structural, Optical, and Antifungal Characteristics of Al‐Doped MnFe₂O₄ Ferrite Nanoparticles

Investigation of Structural, Optical, and Antifungal Characteristics of Al‐Doped MnFe₂O₄ Ferrite Nanoparticles