Preparation and characterization of MnIn-layered double hydroxides (LDHs), extension of the synthesis to fabricate MnM(III)-LDHs (M = Al, Sc, Cr, Fe, Ga), and the comparison of their photocatalytic and catalytic activities in the oxidation of hydroquinone

Szabó, Viktor; Mészáros, Rebeka; Pálinkó, István; Sipos, Pál; Szabados, Márton

doi:10.1016/j.molstruc.2022.132966

Cited by 5 publications

(3 citation statements)

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“…In addition to the holes, these radicals are also able to attack the dye molecules causing degradation. This route of photocatalytic degradation can be elucidated by using hydroquinone (H 2 Q) [49][50][51][52][53] that does not absorb light in the reflectance band region of the 15 nm ZnO-coated M. sulkowskyi wing.…”

Section: Discussionmentioning

confidence: 99%

Spectral tuning of biotemplated ZnO photonic nanoarchitectures for photocatalytic applications

et al. 2022

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The photocatalytic activity of a flat surface can be increased by micro- and nanostructuring the interface to increase the area of the contact surface between the photocatalyst and the solute, and moreover, to optimize charge carrier transfer. Further enhancement can be achieved by using photonic nanostructures, which exhibit photonic band gap (PBG). Structurally coloured butterfly wings offer a rich ‘library’ of PBGs in the visible spectral range which can be used as naturally tuned sample sets for biotemplating. We used conformal atomic layer deposition of ZnO on the wings of various butterfly species ( Arhopala asopia , Hypochrysops polycletus , Morpho sulkowskyi , Polyommatus icarus ) possessing structural colour extending from the near UV to the blue wavelength range, to test the effects arising from the nanostructured surfaces and from the presence of different types of PBGs. Aqueous solutions of rhodamine B were used to test the enhancement of photocatalytic activity that was found for all ZnO-coated butterfly wings. The best reaction rate of decomposing rhodamine B when illuminated with visible light was found in 15 nm ZnO coated M. sulkowskyi wing, the reflectance of which had the highest overlap with the absorption band of the dye and had the highest reflectance intensity.

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Section: Discussionmentioning

confidence: 99%

Spectral tuning of biotemplated ZnO photonic nanoarchitectures for photocatalytic applications

et al. 2022

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“…When irradiation with light (hv)≥energy band gap (Eg), the electrons on the Valence Band (VB) of the Mg 2+ ‐Mo 6+ ‐Al 3+ ‐MoO 4 2− ‐LDHs material absorb energy and transition to the Conduction Band (CB) to generate photogenerated electrons, and the electron holes (h + ) on the VB will produce photogenerated electron‐hole pairs with it [44] . The second step is the separation of photogenerated electrons and electron holes, which migrate to the surface of the photocatalyst respectively [45] . Finally, electron (e − ) and h + undergo a redox reaction with substances to convert light energy into chemical energy to generate ⋅OH radicals [46] .…”

Section: Resultsmentioning

confidence: 99%

“…[44] The second step is the separation of photogenerated electrons and electron holes, which migrate to the surface of the photocatalyst respectively. [45] Finally, electron (e À ) and h + undergo a redox reaction with substances to convert light energy into chemical energy to generate * OH radicals. [46] Phenol is completely oxidized to CO 2 and H 2 O by the strong oxidizing properties of * OH radicals.…”

Section: Contamination Assessment For Phenol Degradationmentioning

confidence: 99%

Assembly of Mg‐Mo‐Al‐Layered double hydroxides (LDHs) @ MoO₄²⁻ and Its Synergistic Photocatalytic Degradation of Phenol in Wastewater

Pang

Zheng

et al. 2022

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Mg2+‐Mo6+‐Al3+‐MoO42−‐Layered double hydroxides (LDHs) materials were successfully prepared via a hydrothermal method by doping Mo6+ in hydroxide laminates and inserting MoO42− to replace the interlayer anions of LDHs materials. The samples were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Fourier transform infrared spectrometer (FTIRS) and ultraviolet‐visible spectrophotometer (UV). The electronic density of states was calculated using the density functional theory (DFT) of Vienna Ab‐initio Simulation Package (VASP). The effects of Mo6+ and MoO42− on the structure, morphology, electronic structure and photocatalytic performance of Mg2+‐Al3+‐LDHs were systematically studied. The conditions for phenol degradation by Mg2+‐Mo6+‐Al3+‐MoO42−‐LDHs were optimized by single factor analysis and response surface methodology. The results show that the MoO42− anion reduces the band gap width and thus enhances the absorption of low‐energy photons. The interaction between cations and anions enhances the photocatalytic performance. When the dosage of Mg2+‐Mo6+‐Al3+‐MoO42−‐LDHs was 0.03 g, the temperature was 40 °C and the visible light irradiation was 15 min, the removal rate of phenol reached 94.76 %.

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Green and rapid synthesis of manganese–aluminum layered double hydroxide for highly selective extraction of Ag+ over Cu2+

et al. 2023

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Preparation and characterization of MnIn-layered double hydroxides (LDHs), extension of the synthesis to fabricate MnM(III)-LDHs (M = Al, Sc, Cr, Fe, Ga), and the comparison of their photocatalytic and catalytic activities in the oxidation of hydroquinone

Cited by 5 publications

References 62 publications

Spectral tuning of biotemplated ZnO photonic nanoarchitectures for photocatalytic applications

Spectral tuning of biotemplated ZnO photonic nanoarchitectures for photocatalytic applications

Assembly of Mg‐Mo‐Al‐Layered double hydroxides (LDHs) @ MoO₄²⁻ and Its Synergistic Photocatalytic Degradation of Phenol in Wastewater

Green and rapid synthesis of manganese–aluminum layered double hydroxide for highly selective extraction of Ag+ over Cu2+

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Preparation and characterization of MnIn-layered double hydroxides (LDHs), extension of the synthesis to fabricate MnM(III)-LDHs (M = Al, Sc, Cr, Fe, Ga), and the comparison of their photocatalytic and catalytic activities in the oxidation of hydroquinone

Cited by 5 publications

References 62 publications

Spectral tuning of biotemplated ZnO photonic nanoarchitectures for photocatalytic applications

Spectral tuning of biotemplated ZnO photonic nanoarchitectures for photocatalytic applications

Assembly of Mg‐Mo‐Al‐Layered double hydroxides (LDHs) @ MoO42− and Its Synergistic Photocatalytic Degradation of Phenol in Wastewater

Green and rapid synthesis of manganese–aluminum layered double hydroxide for highly selective extraction of Ag+ over Cu2+

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Assembly of Mg‐Mo‐Al‐Layered double hydroxides (LDHs) @ MoO₄²⁻ and Its Synergistic Photocatalytic Degradation of Phenol in Wastewater