CeO2-Fe2O3 mixed oxides: Synthesis, characterization and evaluation in the photocatalytic degradation of nitroaromatic compounds from wastewater of the explosives industry

Nava, Mariana Riboli; Pereira, Cíntia Andreia Alves; Brackmann, Rodrigo; Lenzi, Giane Gonçalves; Dias, Daniele Toniolo; Souza, Éder Carlos Ferreira de; Borges, José Flávio Marcelino; Cunha, J.B.M. da; Barreto-Rodrigues, Márcio

doi:10.1016/j.jphotochem.2022.113839

Cited by 14 publications

(2 citation statements)

References 68 publications

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“…Environmental pollution has recently attracted considerable attention. Several removal methods have been developed to eliminate nitroaromatics, e.g., biodegradation, photocatalytic degradation, electro-Fenton degradation, electrochemical reduction, adsorption, and chemical reduction . Among these methods, chemical reduction is most widely used to catalyze the reduction of nitroaromatics to their corresponding aromatic amines − owing to its high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Nano-Gold Immobilized on the Inner Surfaces of Halloysite Nanotubes for Selective Reduction of Nitroaromatics

Lin,

Liu,

et al. 2024

ACS Appl. Nano Mater.

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In catalytic reactions, the diverse binding sites of nanometals located in nanomaterials considerably influence the activity of nanocatalysts. In this study, the special nanostructure and charge distribution of halloysite nanotubes (HNTs) incorporating a weak reducing agent closo-dodecaborate (closo-[B 12 H 12 ] 2− ) were leveraged to immobilize Au nanoparticles (NPs) on the inner and outer surfaces of HNTs. The introduction of closo-[B 12 H 12 ] 2− into HNTs was achieved via vacuum extraction and acid immersion. Subsequently, nanocatalysts loaded with Au NPs on the diverse surfaces of the HNTs were obtained from a direct reaction with a KAuCl 4 solution. The Au NPs loaded on the inner surface of the HNTs were found to have highly dispersed and exhibited excellent catalytic activity in the reduction of nitroaromatics. At room temperature, the Au NPs loaded on the inner surface of the HNTs with a mass fraction of 0.02% showed a high turnover frequency value of 47.28 min −1 in a model reaction of the catalytic reduction of 4-nitrophenol to 4-aminophenol and exhibited excellent stability in cycling tests. Therefore, this study provides a new approach for synthesizing nanocomposites for various practical applications.

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Section: Introductionmentioning

confidence: 99%

Catalytic Nano-Gold Immobilized on the Inner Surfaces of Halloysite Nanotubes for Selective Reduction of Nitroaromatics

Lin,

Liu,

et al. 2024

ACS Appl. Nano Mater.

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“…A common drawback of using traditional wastewater treatment techniques, including physical, chemical and biotechnologies for the treatment of such wastewater and their resulting contamination, is the removal of low efficiency or high treatment costs and possible secondary contaminations [3,4] . Nowadays, the heterogeneous photocatalytic technology has the practical application potential [5][6][7] with the economic, efficient and environmental-friendly photo-catalysts and the developed photocatalytic processes, and will play an important role in this field.…”

Section: Introductionmentioning

confidence: 99%

A facile preparation of g-C₃N₄/a-Fe₂O₃/TiO₂ composite and its photocatalysis performance on the degradation of DNT/TNT under simulated sunlight

Xiufang,

Yuan,

Chunyao

2023

J. Phys.: Conf. Ser.

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It has been difficult to solve the environmental problems caused by trinitrotoluene(TNT)/dinitrotoluene(DNT) containing explosive wastewater for decades. The advanced oxidation method based on photocatalysis and hydrogen peroxide has gained considerable popularity in the field of pollutant degradation. In order to find a coping strategy, using a simple method involving obtaining g-C3N4/Fe2O3(CNFe) by two-step calcination and then mixing butyl titanate and CNFe through a sol-gel pathway, a type of low-cost g-C3N4/Fe2O3/TiO2(CNFeTi) ternary composite was prepared and then characterized by SEM-EDS, IR, Raman spectroscopy, XRD, XPS, UV-vis, etc. Using the prepared CNFeTi as catalyst, the effects of the amount of catalyst and H2O2 dosage on the photocatalytic degradation of DNT/TNT in aqueous solution have been investigated under simulated sunlight, with the reaction being tracked by UV-vis spectrophotometer. And from the results it was shown to have excellent photocatalytic performance. Under the conditions of 1.0 g·L−1 H2O2, 3.0 g·L−1 C3N4/Fe2O3/TiO2, 15 A current intensity of a Xenon light source and natural pH, 95% DNT and 91% TNT were removed after 30 min irradiation, indicating the proposed system has a high degradation rate. The CNFeTi catalyst could be reused at least five times and exhibited good stability.

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Use of Co3O4 nanoparticles with different surface morphologies for removal of toxic substances and investigation of antimicrobial activities via in vivo studies

Kurnaz Yetim,

Hasanoğlu Özkan,

Öğütçü

2023

Environ Sci Pollut Res

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CeO2-Fe2O3 mixed oxides: Synthesis, characterization and evaluation in the photocatalytic degradation of nitroaromatic compounds from wastewater of the explosives industry

Cited by 14 publications

References 68 publications

Catalytic Nano-Gold Immobilized on the Inner Surfaces of Halloysite Nanotubes for Selective Reduction of Nitroaromatics

Catalytic Nano-Gold Immobilized on the Inner Surfaces of Halloysite Nanotubes for Selective Reduction of Nitroaromatics

A facile preparation of g-C₃N₄/a-Fe₂O₃/TiO₂ composite and its photocatalysis performance on the degradation of DNT/TNT under simulated sunlight

Use of Co3O4 nanoparticles with different surface morphologies for removal of toxic substances and investigation of antimicrobial activities via in vivo studies

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CeO2-Fe2O3 mixed oxides: Synthesis, characterization and evaluation in the photocatalytic degradation of nitroaromatic compounds from wastewater of the explosives industry

Cited by 14 publications

References 68 publications

Catalytic Nano-Gold Immobilized on the Inner Surfaces of Halloysite Nanotubes for Selective Reduction of Nitroaromatics

Catalytic Nano-Gold Immobilized on the Inner Surfaces of Halloysite Nanotubes for Selective Reduction of Nitroaromatics

A facile preparation of g-C3N4/a-Fe2O3/TiO2 composite and its photocatalysis performance on the degradation of DNT/TNT under simulated sunlight

Use of Co3O4 nanoparticles with different surface morphologies for removal of toxic substances and investigation of antimicrobial activities via in vivo studies

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A facile preparation of g-C₃N₄/a-Fe₂O₃/TiO₂ composite and its photocatalysis performance on the degradation of DNT/TNT under simulated sunlight