Structural, electrochemical and photocatalytic properties of zinc doped Co1-xZn1.5xFeO3 perovskites prepared by auto combustion sol–gel approach

Bibi, Ismat; Nazeer, Zarish; Majid, Farzana; Ata, Sadia; Hakami, Othman; Talib, Iqra; Iqbal, Munawar; Fatima, Mahvish; Alfryyan, Nada; Alwadai, Norah

doi:10.1016/j.rinp.2021.104392

Cited by 23 publications

(12 citation statements)

References 37 publications

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“…Therefore, it produces polarization, which consequently enhances the dielectric constant. Space charges are unable to keep up with the rapidly changing applied electric field at higher frequencies, which may decrease the dielectric constant at higher frequencies . The ionic, interfacial, electronic, and dipolar changes are responsible for polarization at low frequencies, which enhance the dielectric constant.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Electron hopping in doped materials was decreased by the addition of Cd and Er, as well as conforming substitution of Bi and Fe host cations. The material’s resistivity decreased due to a decrease in electron hopping from Er 2+ to Er 3+ , and this property is useful for such materials in microwave and electronic devices …”

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

“…Hence, it is fair to classify BFOCE as a photocatalyst with significant oxidation capability . The simultaneous presence of dopants effectively prevents recombination of the e – /h + couples, extending the lifetime of photoactive species. ,,, The photo-generated species route for CV degradation is summarized in eqs – . Bi 1 − x Cd x Fe 1 − y Er y normalO 3 + h ν → Bi 1 − x Cd x Fe 1 − y Er y normalO 3 0.25em ( e − CB ) + ( h + VB ) Bi 1 − x Cd x Fe 1 − y Er y normalO 3 ( h + VB ) + normalH 2 normalO → …”

Section: Results and Discussionmentioning

confidence: 99%

“…In photocatalysis, degradation takes place at the surface of the photocatalyst through an oxidative process. For efficient and cost-effective degradation, it is crucial that the photocatalysts remain active under visible light irradiation. , Different catalysts have been studied, which proved efficient for catalytic applications, i.e., metallic oxides, composites, and doped materials, ,,, and the BaFe 12 O 19 doping with different elements may also show promising photocatalytic activities. Based on aforementioned facts, a series of Cd- and Er-doped BiFeO 3 synthesized via the micro-emulsion approach and doping influence on ferroelectric, dielectric, electrochemical, and photocatalytic properties was appraised.…”

Section: Introductionmentioning

confidence: 99%

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Optical, Photocatalytic, Electrochemical, Magnetic, Dielectric, and Ferroelectric Properties of Cd- and Er-Doped BiFeO₃ Prepared via a Facile Microemulsion Route

et al. 2023

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A series of Cd-and Er-doped bismuth ferrites were synthesized using a simple microemulsion technique. The influence of Cd and Er doping on the structural, ferroelectric, photocatalytic, and dielectric properties of bismuth ferrite (BFO) was examined in this research. The prepared materials were examined by Xray diffraction, Raman, scanning electron microscopy, and UV−vis techniques. The XRD patterns reflected the formation of a monophasic rhombohedral structure with the space group R3 − c and an average crystallite size calculated to be in the range of 29 to 32 nm. The saturation polarization (P s ), coercivity (H c ), and retentivity (P r ) of the materials were investigated by a hysteresis loop (P-E), and it was perceived that increasing the dopant contents improved the P s and P r values, which may be due to the variation of metal cation valence states. In accordance with the photoluminescence (PL) spectra, a highly substituted material displayed lower recombination and increased charge separation rate (e − −h + ), which eventually contributed to a higher photocatalytic degradation performance of the prepared NMs. Furthermore, as the frequency and dopant concentration increased, the dielectric loss decreased, which could be due to different types of polarization. Bi 1 − x Cd x Fe 1 − y Er y O 3 showed well-saturated hysteresis loops (P-E) with enhanced saturation polarization near 9.7 × 10 −4 μC•cm −2 . The remnant polarization of the BFO and BFOCE NPs was 2.26 × 10 −4 and 8.11 × 10 −4 μC• cm −2 , respectively, under a maximum electric field, which may be due to the variation of the metal cation valence states. The improved ferroelectric and dielectric properties of Bi 1 − x Cd x Fe 1 − y Er y O 3 NPs are attributed to the reduced concentration of defects, the different domain behavior, and the valence state of Cd and Er ions. The electrochemical (crystal violet (CV) and I−V) properties of Bi 1 − x Cd x Fe 1 − y Er y O 3 were all influenced by the dopant concentrations (Cd and Er). The synergistic effects of Cd and Er on the substituted material enhanced the specific capacitance in comparison to undoped BiFeO 3 . The photocatalytic activity to degrade CV under visible irradiation increased in BFOCE as the dopant (x,y) concentration increased from 0 to 0.25 by showing 84% dye degradation in comparison to pristine BiFeO 3 (53% only) within 120 min under visible light. Moreover, the stability of these prepared nanoparticles was confirmed using recycling experiments, with the results indicating that the synthesized nanomaterials demonstrated promising stability and reusability.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optical, Photocatalytic, Electrochemical, Magnetic, Dielectric, and Ferroelectric Properties of Cd- and Er-Doped BiFeO₃ Prepared via a Facile Microemulsion Route

et al. 2023

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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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Synthesis and characterization of TiO₂ foam and SiO₂@TiO₂ core‐shell nanostructure for gnetin dye degradation from industrial effluent

Bora,

Joshi

2024

Environmental Quality Mgmt

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The current study intends to create TiO2 foam, SiO2 nanoparticles (NPs), and SiO2@TiO2 core‐shell nanostructure (CSN) with improved photocatalytic durability for the quick degradation of the textile industrial water pollutant in the presence of sunlight. The sol‐gel, Stöber, and chemical co‐precipitation methods have been used to synthesize TiO2 foam, SiO2 NPs, and SiO2@TiO2 CSN. X‐ray diffraction results have revealed the anatase phase of TiO2 foam, the amorphous nature of SiO2 NPs, and the amorphous nature of SiO2@TiO2 CSN due to equal wt.% of SiO2 NPs and TiO2 foam at 300 K. Field emission scanning electron microscope images show that the TiO2 foam, SiO2 NPs, and SiO2@TiO2 CSN exhibit cluster sheets, spherical, and spherical raspberry‐like homogeneous morphology. The ultraviolet spectrum confirmed that the TiO2 foam and SiO2@TiO2 CSN have a band gap of 2.9 eV and 3.4 eV. SiO2@TiO2 CSN has been shown an excellent decomposition rate of water pollutants (gentian dye) in comparison to TiO2 foam due to their better‐absorbing nature. Both NPs and CSN employed in the breakdown of gentian dye have been recycled and their original characteristics are preserved. The proposed SiO2@TiO2 CSN has a higher potential for application in developing self‐cleaning, long‐lasting, and air‐purifying materials.

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Structural, electrochemical and photocatalytic properties of zinc doped Co1-xZn1.5xFeO3 perovskites prepared by auto combustion sol–gel approach

Cited by 23 publications

References 37 publications

Optical, Photocatalytic, Electrochemical, Magnetic, Dielectric, and Ferroelectric Properties of Cd- and Er-Doped BiFeO₃ Prepared via a Facile Microemulsion Route

Optical, Photocatalytic, Electrochemical, Magnetic, Dielectric, and Ferroelectric Properties of Cd- and Er-Doped BiFeO₃ Prepared via a Facile Microemulsion Route

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

Synthesis and characterization of TiO₂ foam and SiO₂@TiO₂ core‐shell nanostructure for gnetin dye degradation from industrial effluent

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Structural, electrochemical and photocatalytic properties of zinc doped Co1-xZn1.5xFeO3 perovskites prepared by auto combustion sol–gel approach

Cited by 23 publications

References 37 publications

Optical, Photocatalytic, Electrochemical, Magnetic, Dielectric, and Ferroelectric Properties of Cd- and Er-Doped BiFeO3 Prepared via a Facile Microemulsion Route

Optical, Photocatalytic, Electrochemical, Magnetic, Dielectric, and Ferroelectric Properties of Cd- and Er-Doped BiFeO3 Prepared via a Facile Microemulsion Route

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

Synthesis and characterization of TiO2 foam and SiO2@TiO2 core‐shell nanostructure for gnetin dye degradation from industrial effluent

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Product

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Optical, Photocatalytic, Electrochemical, Magnetic, Dielectric, and Ferroelectric Properties of Cd- and Er-Doped BiFeO₃ Prepared via a Facile Microemulsion Route

Optical, Photocatalytic, Electrochemical, Magnetic, Dielectric, and Ferroelectric Properties of Cd- and Er-Doped BiFeO₃ Prepared via a Facile Microemulsion Route

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

Synthesis and characterization of TiO₂ foam and SiO₂@TiO₂ core‐shell nanostructure for gnetin dye degradation from industrial effluent