Efficient photocatalytic methylene blue degradation by Fe3O4@TiO2 core/shell linked to graphene by aminopropyltrimethoxysilane

Nazari, Yousef; Salem, Shiva

doi:10.1007/s11356-019-05740-8

Cited by 15 publications

(5 citation statements)

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“…Also, Figure a,b, represented that the diffraction feature peaks at (2θ) = 28.46°, 33°, 47.46°, 56.31°, 59.06°, and 69.06° corresponded with the face centered cubic structure of CeO 2 at (111), (200), (220), (311), (222), and (400) planes (JCPDS NO. 34-0394), respectively . Thus, Figure a showed that almost all the diffraction peaks of CeO 2 @TiO 2 core–shell nanospheres correspond with those of the TiO 2 , whereas the diffraction peaks at 28.3° and 33° proved the existence of CeO 2 .…”

Section: Resultsmentioning

confidence: 89%

“…Figure a,b represented the characterization of anatase state of TiO 2 nanoparticles via diffraction peaks at 25.38°, 38.02°, 48.10°, 55.7°, and 62.77° that correspond to (101), (004), (200), (105), and (211) diffraction planes, which in turn refer to JCPDS card NO. 21-1272 . In the attained spectrum, no extra peaks were seen showing that the TiO 2 anatase state was pure.…”

Section: Resultsmentioning

confidence: 89%

“…34-0394), respectively. 65 Thus, Figure 5a showed that almost all the diffraction peaks of CeO 2 @TiO 2 core−shell nanospheres correspond with those of the TiO 2 , whereas the diffraction peaks at 28.3°and 33°proved the existence of CeO 2 . Because of the appearance of titanium dioxide peaks, the specific peak of cerium oxide was covered up.…”

Section: Structural and Morphological Features Ofmentioning

confidence: 91%

“…21-1272. 65 In the attained spectrum, no extra peaks were seen showing that the TiO 2 anatase state was pure. Also, Figure 5a,b, represented that the diffraction feature peaks at (2θ) = 28.46°, 33°, 47.46°, 56.31°, 59.06°, and 69.06°c orresponded with the face centered cubic structure of CeO 2 at (111), ( 200), ( 220), (311), (222), and (400) planes (JCPDS NO.…”

Section: Structural and Morphological Features Ofmentioning

confidence: 99%

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Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

et al. 2022

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Development of light-harvesting properties and inhibition of photogenerated charge carrier recombination are of paramount significance in the photocatalytic process. In the present work, we described the synthesis of core–shell heterostructures, which are composed of titanium oxide (TiO 2 ) and cerium oxide (CeO 2 ) deposited on a reduced graphene oxide (rGO) surface as a conductive substrate. Following the synthesis of ternary rGO-CeO 2 @TiO 2 and rGO-TiO 2 @CeO 2 nanostructures, their photocatalytic activity was investigated toward the degradation of rhodamine B dye as an organic pollutant under UV light irradiation. The obtained structures were characterized with high-resolution transmission electron microscopy, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller, X-ray photoelectron spectroscopy surface analysis, and UV–Vis spectroscopy. Various parameters including pH, catalyst dosage, temperature, and contact time were studied for photocatalysis optimization. Heterostructures showed considerable advantages because of their high surface area and superior photocatalytic performance. In contrast, rGO-CeO 2 @TiO 2 showed the highest photocatalytic activity, which is attributed to the more effective electron–hole separation and quick suppression of charge recombination at core–shell phases. A biological assay of the prepared heterostructure was performed to determine the cytotoxicity against breast cancer cells (MCF-7) and demonstrated a very low survival rate at 7.65% of cells at the 17.5 mg mL –1 concentration of applied photocatalyst.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 89%

Section: Structural and Morphological Features Ofmentioning

confidence: 91%

Section: Structural and Morphological Features Ofmentioning

confidence: 99%

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Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

et al. 2022

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“…In recent decades, the use of composite materials as a photocatalyst to degrade organic dyes is increased significantly due to their eminent structural features (Ali & Ahmad, 2022; Gao et al., 2013; Mehtab et al., 2022; Nazari & Salem, 2019; Oliva et al., 2018; Roonasi & Mazinani, 2017; Wang et al., 2009; Zhu et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

Catalytic degradation of toxic organic dye using an aluminum‐doped Cu_0.4Zn_0.6‐xAl_xFe₂O₄ (x = 0.0, 0.2, 0.4, 0.6) spinel ferrite in a photo‐Fenton system

Akhter

Dutta

Dhar

et al. 2022

Environmental Quality Mgmt

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Catalytic activity of spinel ferrite in breaking down toxic dye materials are promising due to their uniqueness. In this study, aluminum-doped copper zinc ferrite, Cu 0.4 Zn 0.6-x Al x Fe 2 O 4 (x = 0.0, 0.2, 0.4, 0.6), a catalyst for toxic dye degradation is synthesized through chemical co-precipitation route. The formation of the spinel ferrite catalyst is initially confirmed by Fourier transform infrared spectra, which shows the frequency of metal-oxygen bond vibration at 539 and 427 cm −1 attributed to the tetrahedral and octahedral sites respectively. Higher intensity sharp peak of X-ray diffraction for (311) plane is the evidence for the phase purity and the formation of spinel ferrite. The crystallite size is found to decrease with the increase of Al 3+ ion.The surface structure of the obtained particles is investigated using a scanning electron microscope. Analyses of the material's magnetic characteristics using a vibrating sample magnetometer (VSM) revealed that it is, in fact, a soft magnet, as evidenced by the loop of its hysteresis, which is narrow. The catalytic degradation of methylene blue dye under the mechanism of the photo-Fenton process is studied with the obtained spinel ferrites and the result is found to be as high as 96.5%. The process follows pseudo-second order kinetics and the Langmuir isotherm.

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Carbon-based heterogeneous photocatalysts for water cleaning technologies: a review

et al. 2021

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Efficient photocatalytic methylene blue degradation by Fe3O4@TiO2 core/shell linked to graphene by aminopropyltrimethoxysilane

Cited by 15 publications

References 50 publications

Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Catalytic degradation of toxic organic dye using an aluminum‐doped Cu_0.4Zn_0.6‐xAl_xFe₂O₄ (x = 0.0, 0.2, 0.4, 0.6) spinel ferrite in a photo‐Fenton system

Carbon-based heterogeneous photocatalysts for water cleaning technologies: a review

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Efficient photocatalytic methylene blue degradation by Fe3O4@TiO2 core/shell linked to graphene by aminopropyltrimethoxysilane

Cited by 15 publications

References 50 publications

Fabrication of Graphene-Based TiO2@CeO2 and CeO2@TiO2 Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Fabrication of Graphene-Based TiO2@CeO2 and CeO2@TiO2 Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Catalytic degradation of toxic organic dye using an aluminum‐doped Cu0.4Zn0.6‐xAlxFe2O4 (x = 0.0, 0.2, 0.4, 0.6) spinel ferrite in a photo‐Fenton system

Carbon-based heterogeneous photocatalysts for water cleaning technologies: a review

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Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Fabrication of Graphene-Based TiO₂@CeO₂ and CeO₂@TiO₂ Core–Shell Heterostructures for Enhanced Photocatalytic Activity and Cytotoxicity

Catalytic degradation of toxic organic dye using an aluminum‐doped Cu_0.4Zn_0.6‐xAl_xFe₂O₄ (x = 0.0, 0.2, 0.4, 0.6) spinel ferrite in a photo‐Fenton system