Layered double hydroxide nanocomposites based on carbon nanoforms

Abellán, Gonzalo; Carrasco, Jose A.; Coronado, Eugenio

doi:10.1016/b978-0-08-101903-0.00010-6

Cited by 6 publications

(4 citation statements)

References 183 publications

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“…9 Interestingly, these layered materials can display magnetic behaviour upon the incorporation of paramagnetic metals into the anionic layers. Indeed, reported examples include combinations of M(II) = Mg, Ni, Co, and Zn and M(III) = Al, Fe, Cr, Mn, and Co. 8,10 These magnetic properties are retained at the single-layer level, allowing the design of multifunctional heterostructures 11 and organic-inorganic hybrids with tuneable magnetic response. [12][13][14][15][16] The overall magnetism of LDHs relies on the combination of (i) in-plane magnetic superexchange between metallic cations and (ii) weaker dipolar interactions between the magnetic layers.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional magnetic behaviour in hybrid NiFe-layered double hydroxides by molecular engineering

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Two-dimensional magnetic behaviour in hybrid NiFe-layered double hydroxides by molecular engineering

et al. 2023

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“…A n− symbolizes a constituent ranging from (in)organic anions to macromolecules, and Sv stands for solvent molecules. This general composition leads to a plethora of highly tunable systems [12][13][14][15][16] with relevance in environmental applications [17], photocatalysis [18], energy storage and conversion [19][20][21], quantum materials [22,23], and others [24]. This wide range of potential applications makes the development of reliable scaling processes crucial.…”

Section: Introductionmentioning

confidence: 99%

Upscaling the urea method synthesis of CoAl layered double hydroxides

Jaramillo-Hernández,

Oestreicher,

Mizrahi

et al. 2023

Beilstein J. Nanotechnol.

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Research on two-dimensional materials is one of the most relevant fields in materials science. Layered double hydroxides (LDHs), a versatile class of anionic clays, exhibit great potential in photocatalysis, energy storage and conversion, and environmental applications. However, its implementation in real-life devices requires the development of efficient and reproducible large-scale synthesis processes. Unfortunately, reliable methods that allow for the production of large quantities of two-dimensional LDHs with well-defined morphologies and high crystallinity are very scarce. In this work, we carry out a scale-up of the urea-based CoAl-LDH synthesis method. We thoroughly study the effects of the mass scale-up (25-fold: up to 375 mM) and the volumetric scale-up (20-fold: up to 2 L). For this, we use a combination of several structural (XRD, TGA, and N2 and CO2 isotherms), microscopic (SEM, TEM, and AFM), magnetic (SQUID), and spectroscopic techniques (ATR-FTIR, UV–vis, XPS, ICP-MS, and XANES-EXAFS). In the case of the volumetric scale-up, a reduction of 45% in the lateral dimensions of the crystals (from 3.7 to 2.0 µm) is observed as the reaction volume increases. This fact is related to modified heating processes affecting the alkalinization rates and, concomitantly, the precipitation, even under recrystallization at high temperatures. In contrast, for the tenfold mass scale-up, similar morphological features were observed and assigned to changes in nucleation and growth. However, at higher concentrations, simonkolleite-like Co-based layered hydroxide impurities are formed, indicating a phase competition during the precipitation related to the thermodynamic stability of the growing phases. Overall, this work demonstrates that it is possible to upscale the synthesis of high-quality hexagonal CoAl-LDH in a reproducible manner. It highlights the most critical synthesis aspects that must be controlled and provides various fingerprints to trace the quality of these materials. These results will contribute to bringing the use of these 2D layered materials closer to reality in different applications of interest.

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“…and solvent molecules into the interlayer space. [14][15][16] These highly tunable structures, defined by the formula M II 1Àx M III x (OH) 2 A n/x n−…”

Section: Introductionmentioning

confidence: 99%

“…and solvent molecules into the interlayer space. 14–16 These highly tunable structures, defined by the formula M II 1− x M III x (OH) 2 A n / x n − · m (H 2 O), represent a perfect platform to design Fe-based materials with interesting properties for use in several fields such as anion exchange, water cleaning, magnetism, catalysis, energy storage, anticorrosion, drug delivery, among others. 17–20…”

Section: Introductionmentioning

confidence: 99%