Enhanced UV-light active α-Bi2O3 nanoparticles for the removal of methyl orange and ciprofloxacin

Balarabe, Bachir Yaou; Paria, Shashikana; Keita, Djibril Sekou; Baraze, Abdoul Razak Ibrahim; Kalugendo, Elisa; Tetteh, George Nii Tetteh; Meringo, Manka Merycleopha; Oumarou, Maman Nasser Illiassou

doi:10.1016/j.inoche.2022.110204

Cited by 17 publications

(3 citation statements)

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“…Upon reaching the surface of the nanosheets, these couples exhibit migratory behavior, where they engage in interactions with ROS, which ultimately result in the destruction of MO. Two of the several attack mechanisms that ROS employ against MO molecules are the removal of hydrogen atoms and the disruption of the carbon–carbon double bond . In conclusion, within the authentic photocatalytic degradation process of a semiconductor for the removal of organic dyes, the oxidative species generated on the catalyst’s surface facilitate the decomposition of the dye through a sequential pathway involving intermediates leading to the eventual generation of carbon dioxide and various inorganic byproducts (•OH/ •O 2 – + C 14 H 14 N 3 NaO 3 S → intermediates → SO 4 2– + NO 3 + NH 4 – + H 2 O + CO 2 ) .…”

Section: Resultsmentioning

confidence: 99%

“…Two of the several attack mechanisms that ROS employ against MO molecules are the removal of hydrogen atoms and the disruption of the carbon−carbon double bond. 47 In conclusion, within the authentic photocatalytic degradation process of a semiconductor for the removal of organic dyes, the oxidative species generated on the catalyst's surface facilitate the decomposition of the dye through a sequential pathway involving intermediates leading to the eventual generation of carbon dioxide and various inorganic byproducts…”

Section: Characterizations and Measurementsmentioning

confidence: 99%

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Exfoliation of Bismuth Dichalcogenide Crystals into Bi₂O₃ Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

Xiong,

Wan,

Mia

et al. 2024

J. Phys. Chem. C

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The disintegration of crystals from bismuth dichalcogenides into Bi 2 O 3 nanosheets stands out as a favorable methodology for the photocatalysis of azo dyes and hexavalent chromium [Cr (VI)] in wastewater treatment. In this investigation, the synthesis of Bi 2 O 3 nanosheets via a simple sonication, utilizing N,N-dimethylformamide solvent, was explored. The Bi 2 O 3 powder's EDX spectra indicate peaks for Bi, O, and C at 82.94, 10.18, and 6.89%, respectively, whereas the Tauc plot yields a band gap of 2.67 eV, and its XRD pattern exhibits three distinct peaks, ( 120), ( 200), and (121), suggesting monoclinic Bi 2 O 3 formation. The obtained nanosheets exhibited significant surface area, rock-like shapes composed of multilayer sheets, single-crystalline attributes featuring a lattice spacing of 0.398 nm, and an optical band gap measuring 2.30 eV. Photocatalytic evaluations, employing methyl orange (MO) and Cr (VI), unveiled noteworthy efficiencies, reaching 78.5% within 240 min and 89.8% within 50 min under visible light, respectively. Both catalytic reactions conformed to pseudo-first-order kinetic , with kinetic constants (k) registering at 0.0023 and 0.044 min −1 for MO and Cr (VI), respectively. The photocatalysis process involves the coordinated transport of electrons (e − ) from the Bi 2 O 3 nanosheets to the MO/Cr (VI) adsorbed on their surface, leading to effective wastewater treatment. These findings underscore the promise of exfoliated Bi 2 O 3 nanosheets as an adept and efficient photocatalyst for MO/Cr (VI) contaminated wastewater treatment, featuring their notable contribution to advancing ecological water treatment methodologies.

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Section: Resultsmentioning

confidence: 99%

Section: Characterizations and Measurementsmentioning

confidence: 99%

Exfoliation of Bismuth Dichalcogenide Crystals into Bi₂O₃ Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

Xiong,

Wan,

Mia

et al. 2024

J. Phys. Chem. C

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“…Bi 2 O 3 has many applications in the field of electronics, sensors, optics and catalysis. The reason for this lies mostly in its structure and characteristics: it appears in several crystallographic polymorphs [α (monoclinic), β (tetragonal), γ (body-centered cubic), δ (face-centered cubic), ε (orthorhombic) and ω (triclinic)], and can be obtained in many forms, both micro-and nanocrystalline, in the form of nanoparticles, nanowires, nanosheets, microrods, microflowers etc, depending on its synthesis routes and conditions [24][25][26][27][28][29][30][31]. The most common synthetic methods for Bi 2 O 3 are thermal oxidation of Bi [24], hydrothermal [25], thermal decomposition of a precursor [26], precipitation [28] and the grinding method [30].…”

Section: Introductionmentioning

confidence: 99%

Non-thermal atmospheric-pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi₂O₃ catalyst

PETROVIĆ,

RADIVOJEVIĆ,

RANČEV

et al. 2024

Plasma Sci. Technol.

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Monoclinic Bi2O3 was applied for the first time, to the best of our knowledge, as a catalyst in a process of the dye degradation by the non-thermal atmospheric pressure positive pulsating corona discharge. The research focused on the interaction of the plasma-generated species and the catalyst, as well as its role in the degradation process. Plasma decomposition of the anthraquinone reactive dye Reactive Blue 19 (RB 19) was performed by the self- made reactor system. Bi2O3 was prepared by electrodeposition followed by thermal treatment, and characterized by XRD, SEM and EDX techniques. It was observed that the catalyst promoted decomposition of plasma-generated H2O2 into •OH radicals, the principle dye-degrading reagent, which further attacked the dye molecules. The catalyst improved the decolorization rate by 2.5 times, the energy yield by 93.4%, and the total organic carbon TOC removal by 7.1%, respectively. The excitation of the catalyst mostly occurred through the strikes of plasma-generated reactive ion and radical species from the air, accelerated by the electric field, as well as by the fast electrons with the energy of up to 15 eV, generated by the streamers reaching the liquid surface. Those strikes transferred the energy to the catalyst and created the electrons and holes which further reacted with H2O2 and water, producing the •OH radicals. This was indentified as the primary role of the catalyst in this process. Decolorization reactions followed the pseudo first order kinetics. Production of H2O2 and dye degradation rate increased with the increase of input voltage. The optimal catalyst dose was 500 mg dm-3. Decolorization rate was little lower in the river water compared to the one in deionized water due to the side reactions of •OH radicals with the organic matter and inorganic ions dissolved in the river water.

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Advancing Photocatalysis: Insights from 2D Materials and Operational Parameters for Organic Pollutants Removal

Balarabe,

Atabaev

2024

Advanced Sustainable Systems

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Photocatalysis plays a crucial role in tackling environmental challenges by efficiently breaking down organic pollutants in water. This study highlights the significant contribution of 2D materials in advancing photocatalytic technology for sustainable environmental remediation. It explores various aspects of photocatalytic processes, including important performance metrics such as reaction rate, quantum yield, space yield, energy consumption, and figure of merit. The main focus is on 2D materials‐based structures, such as metal oxide supported on graphene and graphene oxides, MXene, or MoS2 (referred as 2D‐MO NPs), as well as more complex nanocomposite configurations (referred as 2D‐MO NCs). Furthermore, the research examines the complex interaction between compositional and operational factors that influence photocatalytic activity, as well as different photocatalytic mechanisms and active species. Finally, it addresses the current limitations of photocatalytic organic pollutants degradation for field applications and discusses the prospects of this technology.

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Enhanced UV-light active α-Bi2O3 nanoparticles for the removal of methyl orange and ciprofloxacin

Cited by 17 publications

References 50 publications

Exfoliation of Bismuth Dichalcogenide Crystals into Bi₂O₃ Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

Exfoliation of Bismuth Dichalcogenide Crystals into Bi₂O₃ Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

Non-thermal atmospheric-pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi₂O₃ catalyst

Advancing Photocatalysis: Insights from 2D Materials and Operational Parameters for Organic Pollutants Removal

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Enhanced UV-light active α-Bi2O3 nanoparticles for the removal of methyl orange and ciprofloxacin

Cited by 17 publications

References 50 publications

Exfoliation of Bismuth Dichalcogenide Crystals into Bi2O3 Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

Exfoliation of Bismuth Dichalcogenide Crystals into Bi2O3 Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

Non-thermal atmospheric-pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi2O3 catalyst

Advancing Photocatalysis: Insights from 2D Materials and Operational Parameters for Organic Pollutants Removal

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Product

Resources

About

Exfoliation of Bismuth Dichalcogenide Crystals into Bi₂O₃ Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

Exfoliation of Bismuth Dichalcogenide Crystals into Bi₂O₃ Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

Non-thermal atmospheric-pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi₂O₃ catalyst