Heterostructures of Ce-Ti/layered double hydroxides and the derived MMOs for photoenergy applications

Chivu, Valentina; Gilea, Diana; Cioateră, Nicoleta; Cârjă, Gabriela; Mureşeanu, Mihaela

doi:10.1016/j.apsusc.2020.145853

Cited by 15 publications

(14 citation statements)

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“…Despite these advantages, the photocatalytic properties of CeO 2 are restricted by the rapid recombination of photo-generated electrons and holes [ 32 ]. To entangle the photocatalytic properties of the LDH to that of CeO 2 , we previously reported on CeO 2 /Mg(Zn)Al-LDH heterostructures [ 33 ]. On the other hand, hematite (αFe 2 O 3 ) with small range bandgap (~2.2 eV), which can collect visible light, is a semiconductor material widely used in water splitting and as a supercapacitor electrode due to advantages such as: good chemical stability, photocorrosion resistance [ 33 , 34 , 35 ] and absorption capacity in the region of visible light [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

“…To entangle the photocatalytic properties of the LDH to that of CeO 2 , we previously reported on CeO 2 /Mg(Zn)Al-LDH heterostructures [ 33 ]. On the other hand, hematite (αFe 2 O 3 ) with small range bandgap (~2.2 eV), which can collect visible light, is a semiconductor material widely used in water splitting and as a supercapacitor electrode due to advantages such as: good chemical stability, photocorrosion resistance [ 33 , 34 , 35 ] and absorption capacity in the region of visible light [ 36 ]. Disadvantages of this material include: low mobility and the fast recombination properties of charge carriers resulting in the 2–4 nm diffusion lengths of the minority carriers [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

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Fe-Ce/Layered Double Hydroxide Heterostructures and Their Derived Oxides: Electrochemical Characterization and Light-Driven Catalysis for the Degradation of Phenol from Water

2023

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Fe-Ce/layered double hydroxides (LDHs) were synthesized via a facile route by exploiting the “structural memory” of the LDH when the calcined MgAlLDH and ZnAlLDH were reconstructed in the aqueous solutions of FeSO4/Ce(SO4)2. XRD analysis shows the formation of heterostructured catalysts that entangle the structural characteristics of the LDHs with those of Fe2O3 and CeO2. Furthermore, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, TG/DTG, SEM/EDX and TEM results reveal a complex morphology defined by the large nano/microplates of the reconstructed LDHs that are tightly covered with nanoparticles of Fe2O3 and CeO2. Calcination at 850 °C promoted the formation of highly crystallized mixed oxides of Fe2O3/CeO2/ZnO and spinels. The photo-electrochemical behavior of Fe-Ce/LDHs and their derived oxides was studied in a three-electrode photo-electrochemical cell, using linear sweep voltammetry (LSV), Mott–Schottky (M-S) analysis and photo-electrochemical impedance spectroscopy (PEIS) measurements, in dark or under illumination. When tested as novel catalysts for the degradation of phenol from aqueous solutions, the light-driven catalytic heterojunctions of Fe-Ce/LDH and their derived oxides reveal their capabilities to efficiently remove phenol from water, under both UV and solar irradiation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fe-Ce/Layered Double Hydroxide Heterostructures and Their Derived Oxides: Electrochemical Characterization and Light-Driven Catalysis for the Degradation of Phenol from Water

2023

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“…The estimated bandgaps analyzed from UV-Vis DRS and Tauc plot for ZnM-LDHs were 2.91, 2.54, 2.79, and 2.63 eV and for Ti/ZnO–M x O y , it was 2.48, 2.25, 2.41, and 2.33 eV, showing narrower bandgap in Ti-based MMO composite than pristine ZnM LDH. 100 Chemical bonding with functional group interaction and bandgap analysis of Ti–Ce/M LDH (M = ZnAl, MgAl) and their derived MMO heterostructure was reported by Chivu 109 and his group. The Raman spectra in Fig.…”

Section: Structural Investigation Of Ldh and Ldh-derived Materialsmentioning

confidence: 95%

A critical review on layered double hydroxide (LDH)-derived functional nanomaterials as potential and sustainable photocatalysts

Mohanty

Sahoo

Paramanik

et al. 2023

Sustainable Energy Fuels

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“…269 As discussed in the previous section, the strong structural flexibility of the ZnAl LDH could promote the structural reconstruction from MMO back to the intrinsic LDH structure via the rehydration process. 270 This can be further explicated through the regeneration of the OH layer (M OH bond) from the interaction of water with metal oxides (M O bond). 13 Enhanced catalytic efficiency can be remarked based on the generation of the active phase and the exposure of more redox-active sites from the calcination process.…”

Section: Literature Analysis For Efficient Design Of Hybrid Ldhmentioning

confidence: 99%

Recent developments in layered double hydroxide structures with their role in promoting photocatalytic hydrogen production: A comprehensive review

Sherryna

Tahir

2021

Intl J of Energy Research

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Layered double hydroxides (LDHs) have received scientific attractions due to their unique two-dimensional (2D) structure, band gap tunability, and compositional flexibility, leading to the facile incorporation of the metal species into their layered structure. The main objective of this review is to explore the current advancement of LDH-based photocatalysts for photocatalytic hydrogen production by focusing on the role of divalent and trivalent metal incorporations and their efficiency enhancement. Firstly, the mechanism of photocatalysis and its thermodynamics has been explicated to gain basic understanding and fundamentals. Secondly, a brief introduction to the overview of LDH photocatalysts with special attention to the effects of cationic incorporations on the optical properties and computational study towards the electronic density has been demonstrated. Besides, the thermal stability of LDH is briefly discussed, focusing on the effects of temperature towards the conversion into mixed-metal oxide (MMO). Next, the classification of LDH based on divalent and trivalent cationic elements and their role in the brucite layer of LDH are systematically discussed. Attention is given to the mechanistic properties of the extensively studied metals, such as Mg, Ni, Zn, Co, Cr, Fe, V and Al, with the efficiency enhancements through various engineering aspects are demonstrated. The overview summary on the efficient design of LDH is elucidated to provide a deep understanding for improving their photocatalytic properties. Lastly, the future perspectives and recommendations are discussed to provide new insight into the potential of LDH and render them a notable place in solar energy applications.

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Heterostructures of Ce-Ti/layered double hydroxides and the derived MMOs for photoenergy applications

Cited by 15 publications

References 50 publications

Fe-Ce/Layered Double Hydroxide Heterostructures and Their Derived Oxides: Electrochemical Characterization and Light-Driven Catalysis for the Degradation of Phenol from Water

Fe-Ce/Layered Double Hydroxide Heterostructures and Their Derived Oxides: Electrochemical Characterization and Light-Driven Catalysis for the Degradation of Phenol from Water

A critical review on layered double hydroxide (LDH)-derived functional nanomaterials as potential and sustainable photocatalysts

Recent developments in layered double hydroxide structures with their role in promoting photocatalytic hydrogen production: A comprehensive review

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