Solar photocatalytic degradation of Methyl green on CuFe2O4/α Fe2O3 heterojunction

Rouibah, K.; Akika, F.Z.; Rouibah, C.; Boudermine, H.-R.; Douafer, S.; Boukerche, S.; Boukerche, G.; Benamira, M.

doi:10.1016/j.inoche.2022.110361

Cited by 23 publications

(4 citation statements)

References 38 publications

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“…Furthermore, Table S1 compares the present photocatalytic activity of α-Fe2O3-CeO2@Au NC with recent studies using Fe2O3-based nanoparticles under light irradiation [109][110][111][112][113][114][115][116][117][118].…”

Section: Effect Of Various Photocatalyst Concentrationsmentioning

confidence: 79%

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Alshammari,

Kosa,

Patel

et al. 2024

Water

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Developing photocatalytic nanomaterials with unique physical and chemical features using low-cost and eco-friendly synthetic methods is highly desirable in wastewater treatment. In this work, the magnetically separable α-Fe2O3-CeO2 nanocomposite (NC), with its respective metal oxides of α-Fe2O3 and CeO2 nanoparticles, was synthesized using a combination of hexadecyltrimethylammonium bromide (CATB) and ascorbic acid via the hydrothermal method. To tune the band gap, the heterojunction nanocomposite of α-Fe2O3-CeO2 was decorated with plasmonic Au nanoparticles (Au NPs). The various characterization methods, such as FTIR, UV-vis DRS, XRD, XPS, TEM, EDX, SEM, and PL, were used to determine the properties of the materials, including their morphology, elemental composition, optical properties, band gap energy, and crystalline phase. The nanocomposite of α-Fe2O3-CeO2@Au was utilized to remove Rose Bengal (RB) dye from wastewater using a photocatalytic technique when exposed to visible light. A comprehensive investigation of the impact of the catalyst concentration and initial dye concentration was conducted to establish the optimal photodegradation conditions. The maximum photocatalytic efficiency of α-Fe2O3-CeO2@Au (50 mg L−1) for RB (20 ppm) dye removal was found to be 88.9% in 120 min under visible-light irradiation at a neutral pH of 7 and 30 °C. Various scavengers, such as benzoquinone (BQ; 0.5 mM), tert-butyl alcohol (TBA; 0.5 mM), and ethylenediaminetetraacetic acid (EDTA; 0.5 mM), were used to investigate the effects of different free radicals on the photocatalytic process. Furthermore, the reusability of the α-Fe2O3-CeO2@Au photocatalyst has also been explored. Furthermore, the investigation of the potential mechanism demonstrated that the heterojunction formed between α-Fe2O3 and CeO2, in combination with the presence of deposited Au NPs, led to an enhanced photocatalytic efficiency by effectively separating the photogenerated electron (e−)–hole (h+) pairs.

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Section: Effect Of Various Photocatalyst Concentrationsmentioning

confidence: 79%

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Alshammari,

Kosa,

Patel

et al. 2024

Water

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“…2.A and Table 2. According to the IUPAC classi cation [30], These isotherms are classi ed as type IV with an H3 hysteresis loop, indicates the existence of large mesopores (the mesopores range is from 2 to 50 nm) and large adsorption of N 2 at P/P 0 > 0.8. The speci c surfaces and pore volumes of CuFe 2 O 4 (Table 2) materials vary slightly when the synthesis strategy change.…”

Section: Resultsmentioning

confidence: 99%

Synergy of adsorption and solar photoreduction for removal Cr(VI) with spinel CuFe2O4

Benaissa,

Alouache,

Kaid

et al. 2023

Preprint

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The synergy effect between adsorption and solar photocatalysis to remove Cr (VI) is a new approach which is environmentally friendly and sustainable development technology. the choice of photocatalyst is crucial for achieving better performance in adsorption and photocatalytic reactions. The CuFe2O4 catalysts with a spinel structure was synthesized by co-precipitation and sol-gel methods, and characterized by X-ray diffraction (XRD), Brunauer, Emmett and Teller (BET) surface area, scanning electron microscopy (SEM), Raman and Fourier transform infrared spectroscopy (FTIR). The results of this study show that the CuFe2O4-co is an excellent adsorbent and photocatalyst simultaneously for Cr (VI) removal, this activity is correlated to it structural, textural properties and a relatively narrow band gap. The catalyst is mainly crystallized in cubic inverse spinel structure, and exhibit a large pore size facilitates the accessibility of active sites by chromium ions on the surface, and which can also improve absorbed light penetration. Moreover, UV–vis diffuse reflectance spectrum (UV–vis DRS) show that the catalyst has a low band gap energy (Eg=1.2 eV), allowing a broader absorption spectrum, which enhances it capability to generate electron-hole pairs under visible light of solar irradiation.We investigated the effects of oxalic acid as a reducing agent, preparation technique, catalyst concentration, and initial dose of Cr (VI) in this research. The optimum catalyst and pollutant concentrations are 0.25g/L and 25 g/L, respectively, with a 100% reduction of Cr(VI) to Cr(III) accomplished within 1 hour.

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“…Most of the synthesized organic dyes are very stable under heat and light effects; therefore, they are not ecofriendly and non-biodegradable [16,17]. Methyl green (MG) is a triphenylmethane-type cationic dye, broadly used in the textile industry, medicine, and biology [18,19]. It is highly hazardous and the existence of methyl green in the water resources is a great worry owing to its potential poisonousness to the aquatic system and all organisms [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…Methyl green (MG) is a triphenylmethane-type cationic dye, broadly used in the textile industry, medicine, and biology [18,19]. It is highly hazardous and the existence of methyl green in the water resources is a great worry owing to its potential poisonousness to the aquatic system and all organisms [18,19]. In view of that, it is very important to use an efficient method to effectively remove organic pollutants such as norfloxacin and methyl green from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Preparation of New Sm-Doped CuO/ZnO/CuMn2O4 Tri-Composite for Photoremoval of Dissolved Organic Waste and Dielectric-Energy Storage

Althikrallah,

Alsulaim,

Alsharif

et al. 2024

J. Compos. Sci.

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Photocatalysis is considered as simple, green, and the best strategy for elimination of hazardous organic contaminants from wastewater. Herein, new broad spectrum photocatalysts based on pure and Sm-doped CuO/ZnO/CuMn2O4 ternary composites were simply prepared by co-precipitation approach. The X-ray diffraction results proved the formation of a composite structure. The transmission electron microscope (TEM) images displayed that most particles have a spherical shape with average mean sizes within 26–29 nm. The optical properties of both samples signified that the addition of Sm ions significantly improves the harvesting of the visible light spectrum of CuO/ZnO/CuMn2O4 ternary composites. The photocatalytic study confirmed that 97% of norfloxacin and 96% of methyl green pollutants were photo-degraded in the presence of the Sm-doped CuO/ZnO/CuMn2O4 catalyst after 50 and 40 min, respectively. The total organic carbon analysis revealed the high mineralization efficiency of the Sm-doped CuO/ZnO/CuMn2O4 catalyst to convert the norfloxacin and methyl green to carbon dioxide and water molecules. During three cycles, this catalyst presented a high removal efficiency for norfloxacin and methyl green contaminants. As a dielectric energy storage material, the Sm-doped CuO/ZnO/CuMn2O4 ternary composite has large dielectric constant values, mainly at low frequencies, with low dielectric loss compared to a pure CuO/ZnO/CuMn2O4 composite.

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Solar photocatalytic degradation of Methyl green on CuFe2O4/α Fe2O3 heterojunction

Cited by 23 publications

References 38 publications

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Synergy of adsorption and solar photoreduction for removal Cr(VI) with spinel CuFe2O4

Preparation of New Sm-Doped CuO/ZnO/CuMn2O4 Tri-Composite for Photoremoval of Dissolved Organic Waste and Dielectric-Energy Storage

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