A novel bentonite–cobalt doped bismuth ferrite nanoparticles with boosted visible light induced photodegradation of methyl orange: synthesis, characterization and analysis of physiochemical changes

Jamshaid, Muhammad; Khan, Hasan M.; Nazir, Mamona; Wattoo, Muhammad Ahmad; Shahzad, Khurram; Malik, Misbah; Rehman, Azizur

doi:10.1080/03067319.2022.2032014

Cited by 29 publications

(14 citation statements)

References 55 publications

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“…The hydroxyl stretching and bending modes of sorbed water molecules are seen at 3564 and 1632 cm −1 , respectively, while the stretching and bending of structural hydroxyls of bentonite are observed at 3632 and 1047 cm −1 , respectively. Additionally, the bands at 522 and 438 cm −1 are ascribed to Al−O−Si and Si−O−Si deformation, respectively, while the strong band at 1035 cm −1 is related to the Si−O−Si stretching [55–56] . The distinctive peaks at 565 and 476 cm −1 are assigned to Co−O and Fe−O bonds in CoFe 2 O 4 nanoparticles, respectively, showing the existence of pure nanocrystalline CoFe 2 O 4 species on the bentonite surface [52,57] .…”

Section: Resultsmentioning

confidence: 95%

“…Additionally, the bands at 522 and 438 cm À 1 are ascribed to AlÀ OÀ Si and SiÀ OÀ Si deformation, respectively, while the strong band at 1035 cm À 1 is related to the SiÀ OÀ Si stretching. [55][56] The distinctive peaks at 565 and 476 cm À 1 are assigned to CoÀ O and FeÀ O bonds in CoFe 2 O 4 nanoparticles, respectively, showing the existence of pure nanocrystalline CoFe 2 O 4 species on the bentonite surface. [52,57] FTIR spectra of all spinel ferrites decorated bentonite nanocomposites show these distinctive IR bands, which denote the occurrence of spinel ferrites species onto bentonite.…”

Section: Ftir Analysismentioning

confidence: 99%

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Structural, Optical, Magnetic and Photocatalytic Properties of Zn Doped CoFe₂O₄Decorated Bentonite Nanocomposites

Güner

2023

ChemistrySelect

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The bentonite-Zn doped CoFe 2 O 4 photocatalysts were successfully synthesized for the first time by decorating magnetic Zn x Co 1À x Fe 2 O 4 nanoparticles onto the bentonite surface in order to enhance the photocatalytic performance of Zn doped CoFe 2 O 4 nanoparticles. We tried to thoroughly investigate how changes in Zn 2 + concentration affected the particle size, shape, magnetic properties, optical band gap, and photocatalytic activities of B-Zn x Co 1À x Fe 2 O 4 nanocomposites. The photodegradation of crystal violet (CV), a model reaction under visible light irradiations, was used to assess the photocatalytic activities of the samples. Compared to other samples, the B-Zn x Co 1À x Fe 2 O 4 (x = 0.5) showed the highest photocatalytic activity, which is best matched to the pseudo-first-order kinetic. According to investigations using reactive species capture, the superoxide radicals have the main role in the degrading process, while the hydroxyl radicals and holes have a secondary and minimal effect, respectively.

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Section: Resultsmentioning

confidence: 95%

Section: Ftir Analysismentioning

confidence: 99%

Structural, Optical, Magnetic and Photocatalytic Properties of Zn Doped CoFe₂O₄Decorated Bentonite Nanocomposites

Güner

2023

ChemistrySelect

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“…They observed improvement in dielectric and magnetic properties. Jamshaid et al [ 18 ] used a solvothermal method to prepare a bentonite-Co-doped BFO for the photocatalytic degradation of methyl orange in water. Several methods such as pulsed laser [ 19 ], molecular beam epitaxy [ 20 ], sputtering [ 21 ], co-precipitation [ 22 ] and chemical bath [ 8 , 23 ] deposition techniques have been employed to grow BiFeO 3 powder/films.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrocatalytic Degradation of Methylene Blue on Electrodeposited Bismuth Ferrite Perovskite Films

et al. 2023

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Electrodeposited bismuth ferrite (BiFeO3) thin films on fluorine-doped tin oxide (FTO) substrate were employed as photoanodes in the photoelectrocatalytic degradation of methylene blue. The BiFeO3 thin films electrodeposited for 300 s, 600 s, 1200 s, 1800 s and 3600 s were characterised with XRD, field emission scanning electron microscopy (FESEM) and UV–vis diffuse reflectance spectroscopy. SEM images displayed different morphology at different electrodeposition times which affects the photoelectrocatalytic (PEC) performances. The FESEM cross-sectional area was used to measure the thickness of the film. The optical properties showed that the band gaps of the photoanodes were increasing as the electrodeposition time increased. The photocurrent response obtained showed that all thin film photoanodes responded to visible light and lower charge transfer resistance (from electrochemical impedance spectroscopy studies) was observed with photoanodes electrodeposited at a shorter time compared to those at a longer time. The PEC application of the photoanode for the removal of methylene blue (MB) dye in water showed that the percentage degradation decreased with an increase in electrodeposition time with removal rates of 97.6% and 70% observed in 300 s and 3600 s electrodeposition time, respectively. The extent of mineralisation was measured by total organic carbon and reusability studies were carried out. Control experiments such as adsorption, photolysis, photocatalysis and electrocatalysis processes were also investigated in comparison with PEC. The electrodeposition approach with citric acid exhibited improved electrode stability while mitigating the problem of catalyst leaching or peeling off during the PEC process.

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“…Among the various treatment processes adapted for degrading organic micropollutants in water, heterogeneous photocatalysis with titanium dioxide (TiO 2 ) [24], zinc oxide (ZnO) [25], nanocomposites such as tungsten oxide doped (WO 2 /g-C 3 N 4 ) [26], bismuth ferrite (BFO) [27] and other semiconductors have been widely studied. They generate strong oxidant radicals that react non-selectively with pollutants, initiating a series of oxidation reactions that degrade the contaminants and their TPs.…”

Section: Introductionmentioning

confidence: 99%

Towards a Better Understanding of the Back-Side Illumination Mode on Photocatalytic Metal–Organic Chemical Vapour Deposition Coatings Used for Treating Wastewater Polluted by Pesticides

Quintero-Castañeda,

Tendero,

Triquet

et al. 2023

Water

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Pesticides are emerging contaminants that pose various risks to human health and aquatic ecosystems. In this work, diuron was considered as a contaminant model to investigate the influence of the back-side illumination mode (BSI) on the photocatalytic activity of TiO2 coatings grown on Pyrex plates by metal–organic chemical vapour deposition (MOCVD). A photoreactor working in recirculation mode was irradiated at 365 nm with ultraviolet A (UVA) light-emitting diodes in BSI. The degradation of diuron and its transformation products was analysed by high-performance liquid chromatography, ion chromatography, and total organic carbon analysis. The coatings were characterised by X-ray diffraction analysis and scanning electron microscopy. Five coatings containing 3, 7, 10, 12 and 27 mg of TiO2 exhibited different morphology, crystallinity, thickness and photocatalytic activities. The morphology and crystallinity of the coatings had no significant influence on their photocatalytic activity, unlike their mass and thickness. TiO2 contents less than 10 mg limit the photocatalytic activity, whereas those greater than 15 mg are inefficient in the BSI because of their thickness. The maximum efficiency was achieved for coatings of thickness 1.8 and 2 µm with TiO2 contents of 10 and 12 mg, revealing that the photocatalyst thickness controls the photocatalytic efficiency in the BSI.

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A novel bentonite–cobalt doped bismuth ferrite nanoparticles with boosted visible light induced photodegradation of methyl orange: synthesis, characterization and analysis of physiochemical changes

Cited by 29 publications

References 55 publications

Structural, Optical, Magnetic and Photocatalytic Properties of Zn Doped CoFe₂O₄Decorated Bentonite Nanocomposites

Structural, Optical, Magnetic and Photocatalytic Properties of Zn Doped CoFe₂O₄Decorated Bentonite Nanocomposites

Photoelectrocatalytic Degradation of Methylene Blue on Electrodeposited Bismuth Ferrite Perovskite Films

Towards a Better Understanding of the Back-Side Illumination Mode on Photocatalytic Metal–Organic Chemical Vapour Deposition Coatings Used for Treating Wastewater Polluted by Pesticides

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A novel bentonite–cobalt doped bismuth ferrite nanoparticles with boosted visible light induced photodegradation of methyl orange: synthesis, characterization and analysis of physiochemical changes

Cited by 29 publications

References 55 publications

Structural, Optical, Magnetic and Photocatalytic Properties of Zn Doped CoFe2O4Decorated Bentonite Nanocomposites

Structural, Optical, Magnetic and Photocatalytic Properties of Zn Doped CoFe2O4Decorated Bentonite Nanocomposites

Photoelectrocatalytic Degradation of Methylene Blue on Electrodeposited Bismuth Ferrite Perovskite Films

Towards a Better Understanding of the Back-Side Illumination Mode on Photocatalytic Metal–Organic Chemical Vapour Deposition Coatings Used for Treating Wastewater Polluted by Pesticides

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Structural, Optical, Magnetic and Photocatalytic Properties of Zn Doped CoFe₂O₄Decorated Bentonite Nanocomposites

Structural, Optical, Magnetic and Photocatalytic Properties of Zn Doped CoFe₂O₄Decorated Bentonite Nanocomposites