Improved catalytic activity of EDTA–modified BiFeO3 powders for remarkable degradation of procion red by heterogeneous photo–Fenton process

Severo, Eric da Cruz; Dotto, Guilherme L.; Silvestri, Siara; Nunes, Isaac dos Santos; Salla, Julia da Silveira; Cruz, A. Martı́nez-de la; Martinello, Kátia da Boit; Foletto, Edson Luiz

doi:10.1016/j.jece.2020.103853

Cited by 20 publications

(5 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…134 and 1.627 m 2 /g, respectively, which is in agreement with XRD results [66] . It is well known that several varieties of Bi‐based materials have low surface area [67,68] . The obtained physical parameter such as BET surface area, pore volume and pore diameter of the fabricated BFO‐EDTA, BFO‐AA and BFO‐CA samples are summarized in Table 3.…”

Section: Resultssupporting

confidence: 83%

Rapid Synthesis of Pure Phase Bismuth Ferrite through Modified Sol‐gel Auto‐ignition Method: Impact of Different Chelating Agents

Mhamad

Aziz

et al. 2020

ChemistrySelect

View full text Add to dashboard Cite

Pure phase bismuth ferrite has been successfully prepared in this research using a modified method of sol-gel auto-ignition. This method is a fast and economical synthesis technique since it can produce fine as-synthesis powder for less than 4 hours. Also, the influences of diverse chelating agents on the physicochemical properties of the synthesized samples were examined using various characterization techniques. XRD revealed that pure bismuth ferrite nanoparticles with rhombohedral perovskite structure were produced by using ascorbic acid (AA) as a chelating agent. From the UV spectra, a blue shift observed in the presence of AA and citric acid (CA). Moreover, the specific surface area of the as-prepared BFO-EDTA, BFO-AA and BFO-CA samples was 1.694, 1.134 and 1.627 m 2 /g, respectively, consistent with the XRD findings. Raman analysis shows that the synthesized BFO samples exhibit 4 A1 and 8E modes confirming Rhombohedral R3c geometry of bismuth ferrite nanoparticles. Finally, FTIR spectra depicted three absorption peaks at 410, 450, and 548 cm À 1 corresponding to FeÀ O stretching and bending, respectively, which is a characteristic of FeO 6 octahedral in perovskite. The findings of this study would assist the researcher in the selection of chelating agents in the auto-combustion method for the processing of nanoparticles for particular applications.

show abstract

Section: Resultssupporting

confidence: 83%

Rapid Synthesis of Pure Phase Bismuth Ferrite through Modified Sol‐gel Auto‐ignition Method: Impact of Different Chelating Agents

Mhamad

Aziz

et al. 2020

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…The broad band around 3435 cm −1 and a peak at around 1637 cm −1 can be due to residual water in the sample and the deformation modes of O−H of adsorbed water molecules, respectively [40] . The weak intense peak around 1382 cm −1 can be assigned to the residual NO 3 − from the precursor used in the synthesis [42] . Further, the characteristic peaks around 730 and 575 cm −1 indicate the formation of Bi 2 WO 6 structures.…”

Section: Resultsmentioning

confidence: 99%

“…[40] The weak intense peak around 1382 cm À 1 can be assigned to the residual NO 3 À from the precursor used in the synthesis. [42] Further, the characteristic peaks around 730 and 575 cm À 1 indicate the formation of Bi 2 WO 6 structures.…”

Section: Characterization Of Nanostructured Materialsmentioning

confidence: 97%

Chelating Agent‐Assisted‐Bi₂WO₆ Nanostructured Materials for Electron Transfer‐Driven Ultrafast Catalytic Reduction of Organic and Inorganic Contaminants

et al. 2023

View full text Add to dashboard Cite

We report a chelating agent‐assisted synthesis of Bi2WO6 nanomaterials using a facile hydrothermal method. The presence of a chelating agent (EDTA) influences the degree of crystallinity, morphology, and surface area of Bi2WO6. Analysis by electron microscopy revealed morphological changes of Bi2WO6 from flower‐like to multilayered disc‐like structures after introducing EDTA. The surface area of pristine Bi2WO6 NMs is significantly increased from 31 to 50 m2 g−1. We demonstrated the catalytic properties of Bi2WO6 and EDTA‐Bi2WO6 for 4‐nitrophenol (4‐NP), methyl orange (MO), congo red (CR), and [Fe(CN)6]3− reductions in the presence of NaBH4. It was observed that EDTA‐Bi2WO6 exhibited higher catalytic activity compared to the pristine Bi2WO6 NMs. The reduction reactions followed pseudo‐first‐order kinetics and the rate constant values of EDTA‐Bi2WO6 for 4‐NP, MO, CR, and [Fe(CN)6]3− reductions were found to be 0.847, 0.584, 0.702, and 0.463 min−1, respectively. The reduction proceeds through electron transfer process over an EDTA‐Bi2WO6 catalyst in the presence of NaBH4. Furthermore, EDTA‐Bi2WO6 also showed ultrafast catalytic performance to dichromate (Cr2O72−) reduction, compared to pristine Bi2WO6. The EDTA‐Bi2WO6 catalyst could be recycled up to five times without undergoing a significant loss in activity.

show abstract

“…Improvements in photocatalytic activity of some metal oxides by chelating ligands are reported in the literature, albeit rarely. , A majority of these reports focus on the augmentation of Fenton and photo-Fenton processes using Fe-based catalysts in the presence of organic ligands. − The primary factor attributed to the improvement in catalytic activity is the strong ligand-to-metal charge-transfer (LMCT) observed in homogeneous or heterogeneous Fe-ligand complexes. ,− LMCT could accelerate the formation and activation of H 2 O 2 via a Fenton-like process. For example, Wang et al demonstrated the efficiency of ligands such as EDTA, oxalate (OXA), and phosphate ions (Na 2 HPO 4 ) in activating oxygen by Fe(0) to generate oxidative hydroxyl radicals for sulfamethazine (SMT) removal .…”

Section: Introductionmentioning

confidence: 99%

Push–Pull Engine─Electron Pumping by Anchored Ligands over ZnO/C: Boosting Photo-Fenton-Like Catalysis without Additional Oxidants

Sharma,

Kaushik,

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

Effective production of reactive oxygen species (ROS) is essential for advanced oxidation processes in water treatment. This research delves into the enhancement of photo-Fenton response using an unconventional catalyst, zinc-oxide/carbon hierarchical nanocomposite microspheres (ZnO/C HNMs), to facilitate the photocatalytic oxidation of pollutants. Among the investigated electron-donating organic ligands, ethylenediaminetetraacetic acid (EDTA) exhibited the most significant impact. Through in-situ UV-irradiated XPS, density functional theory calculations, and optical characterizations, a ‘push–pull’ effect of electrons between EDTA and the carbon collector has been elucidated. This effect facilitates the accumulation of photogenerated holes and electrons over the carbon and ZnO components of ZnO/C-EDTA HNMs, respectively, thereby endowing them with dual functionality as photo-Fenton catalysts capable of both in-situ H2O2 generation and activation. ZnO/C-EDTA HNMs demonstrate outstanding photocatalytic pollutant removal efficiency, achieving levels of up to 500 mg g–1, surpassing those of other reported Zn-based photocatalysts. Moreover, the enhancement induced by the ligand extends beyond pollutant removal, manifesting in significantly increased photocatalytic H2 production when combined with a Pt cocatalyst and glucose as a sacrificial biomass. This underscores the versatility and applicability of the ZnO/C-EDTA HNMs across different environmental remediation scenarios. This discovery presents a novel strategy for modulating charge transfer over transition-metal-oxide/carbon interfaces using electron-donating ligands, with significant implications for efficient wastewater treatment and other related environmental applications.

show abstract

Improved catalytic activity of EDTA–modified BiFeO3 powders for remarkable degradation of procion red by heterogeneous photo–Fenton process

Cited by 20 publications

References 35 publications

Rapid Synthesis of Pure Phase Bismuth Ferrite through Modified Sol‐gel Auto‐ignition Method: Impact of Different Chelating Agents

Rapid Synthesis of Pure Phase Bismuth Ferrite through Modified Sol‐gel Auto‐ignition Method: Impact of Different Chelating Agents

Chelating Agent‐Assisted‐Bi₂WO₆ Nanostructured Materials for Electron Transfer‐Driven Ultrafast Catalytic Reduction of Organic and Inorganic Contaminants

Push–Pull Engine─Electron Pumping by Anchored Ligands over ZnO/C: Boosting Photo-Fenton-Like Catalysis without Additional Oxidants

Contact Info

Product

Resources

About

Improved catalytic activity of EDTA–modified BiFeO3 powders for remarkable degradation of procion red by heterogeneous photo–Fenton process

Cited by 20 publications

References 35 publications

Rapid Synthesis of Pure Phase Bismuth Ferrite through Modified Sol‐gel Auto‐ignition Method: Impact of Different Chelating Agents

Rapid Synthesis of Pure Phase Bismuth Ferrite through Modified Sol‐gel Auto‐ignition Method: Impact of Different Chelating Agents

Chelating Agent‐Assisted‐Bi2WO6 Nanostructured Materials for Electron Transfer‐Driven Ultrafast Catalytic Reduction of Organic and Inorganic Contaminants

Push–Pull Engine─Electron Pumping by Anchored Ligands over ZnO/C: Boosting Photo-Fenton-Like Catalysis without Additional Oxidants

Contact Info

Product

Resources

About

Chelating Agent‐Assisted‐Bi₂WO₆ Nanostructured Materials for Electron Transfer‐Driven Ultrafast Catalytic Reduction of Organic and Inorganic Contaminants