FTIR characterization of layered double hydroxides and modified layered double hydroxides

Shabanian, Meisam; Hajibeygi, Mohsen; Raeisi, Ahmad

doi:10.1016/b978-0-08-101903-0.00002-7

Cited by 56 publications

(52 citation statements)

References 86 publications

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“…The broad absorption band at 3410 cm −1 can be attributed to the O-H stretching vibrations of the hydroxyl groups and the presence of water molecules in the interlayer of LDH [22]. Specifically, the interlayered lattice water is hydrogen bonded to the transition metal slabs [33,34]. It is expected that during delithiation, the crystal water molecules remain in the interlayer space [35,36].…”

Section: Resultsmentioning

confidence: 99%

Electrochemical study on nickel aluminum layered double hydroxides as high-performance electrode material for lithium-ion batteries based on sodium alginate binder

Fortunato

Cardinale

et al. 2021

J Solid State Electrochem

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Nickel aluminum layered double hydroxide (NiAl LDH) with nitrate in its interlayer is investigated as a negative electrode material for lithium-ion batteries (LIBs). The effect of the potential range (i.e., 0.01–3.0 V and 0.4–3.0 V vs. Li+/Li) and of the binder on the performance of the material is investigated in 1 M LiPF6 in EC/DMC vs. Li. The NiAl LDH electrode based on sodium alginate (SA) binder shows a high initial discharge specific capacity of 2586 mAh g−1 at 0.05 A g−1 and good stability in the potential range of 0.01–3.0 V vs. Li+/Li, which is better than what obtained with a polyvinylidene difluoride (PVDF)-based electrode. The NiAl LDH electrode with SA binder shows, after 400 cycles at 0.5 A g−1, a cycling retention of 42.2% with a capacity of 697 mAh g−1 and at a high current density of 1.0 A g−1 shows a retention of 27.6% with a capacity of 388 mAh g−1 over 1400 cycles. In the same conditions, the PVDF-based electrode retains only 15.6% with a capacity of 182 mAh g−1 and 8.5% with a capacity of 121 mAh g−1, respectively. Ex situ X-ray photoelectron spectroscopy (XPS) and ex situ X-ray absorption spectroscopy (XAS) reveal a conversion reaction mechanism during Li+ insertion into the NiAl LDH material. X-ray diffraction (XRD) and XPS have been combined with the electrochemical study to understand the effect of different cutoff potentials on the Li-ion storage mechanism. Graphical abstract The as-prepared NiAl-NO3−-LDH with the rhombohedral R-3 m space group is investigated as a negative electrode material for lithium-ion batteries (LIBs). The effect of the potential range (i.e., 0.01–3.0 V and 0.4–3.0 V vs. Li+/Li) and of the binder on the material’s performance is investigated in 1 M LiPF6 in EC/DMC vs. Li. Ex situ X-ray photoelectron spectroscopy (XPS) and ex situ X-ray absorption spectroscopy (XAS) reveal a conversion reaction mechanism during Li+ insertion into the NiAl LDH material. X-ray diffraction (XRD) and XPS have been combined with the electrochemical study to understand the effect of different cutoff potentials on the Li-ion storage mechanism. This work highlights the possibility of the direct application of NiAl LDH materials as negative electrodes for LIBs.

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Section: Resultsmentioning

confidence: 99%

Electrochemical study on nickel aluminum layered double hydroxides as high-performance electrode material for lithium-ion batteries based on sodium alginate binder

Fortunato

Cardinale

et al. 2021

J Solid State Electrochem

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“…The strong bands at %1750-1250 cm À1 are assigned to asymmetric and symmetric stretching modes of the carboxylic groups. [32] The difference between both bands, Δv ¼ v asym À v sym , can be useful for revealing the carboxylate interaction. Indeed, the lower Δv for CoAl(Sub) sample (122 cm À1 ) suggests ionic interaction; in turn an unidentate coordination can be proposed for α-Co II (Sub) (Scheme 1 and Figure 1B-inset) in view of the higher Δv (145 cm À1 ).…”

Section: Doi: 101002/pssr202000380mentioning

confidence: 99%

“…Indeed, the lower Δv for CoAl(Sub) sample (122 cm À1 ) suggests ionic interaction; in turn an unidentate coordination can be proposed for α-Co II (Sub) (Scheme 1 and Figure 1B-inset) in view of the higher Δv (145 cm À1 ). [33,34] Finally, the broad band centered at %3450 cm À1 is attributed to the presence of interlayer water molecules (O─H stretching modes), [32] whereas the bands below 1000 cm À1 are related to M─O stretching and M─OH bending vibrations. [35] UV-vis diffuse reflectance spectroscopy is a suitable technique in LHs characterization as it can provide information about both metallic coordination environments [36] and the type of functionalization.…”

Section: Doi: 101002/pssr202000380mentioning

confidence: 99%

The Role of Covalent Functionalization in the Thermal Stability and Decomposition of Hybrid Layered Hydroxides

Oestreicher

Abellán

Coronado

2020

Physica Rapid Research Ltrs

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Hybrid organic-inorganic materials represent one of the hottest research topics in materials science. The close structureproperty relationship exhibited in these materials gives rise to a wide variety of applications in fields ranging from biomedicine, catalysis or magnetism to energy storage and conversion. [1-4] Layered and 2D systems, especially those based on earthabundant metals, are playing a key role in the hybrid materials family. The possibility of combining their physical, chemical, and mechanical properties, and the precise control over their structures, placed them in a privileged position. [5-12] Among others, layered hydroxides (LHs) offer a broad range of possibilities due to their tunable chemistry, which allows to modify at will both the inorganic layers and (in)organic intercalated anions. [13] Layered double hydroxides (LDHs) constitute the most famous member of the LHs family exhibiting purely electrostatic sheet/anion interactions. These lamellar systems display hydrotalcite-like structures composed of positive charged sheets where both M II and M III octahedral cations can be tuned. [14] In line with that, hybrid LDHs have been proposed, among others, used for stimuli-responsive materials, or as a precursor for the synthesis of carbon-based nanocomposites of interest in energy storage and conversion. [15-17] In all cases, the main properties are governed by the chemical nature of both components (inorganic host and organic guest) and the interaction between them, which is always electrostatic. In the search of new levels of functionality and complexity, different functionalization strategies have been explored, mainly based in the covalent functionalization (e.g., sylilation) of the interface, resulting in improved absorption properties but slight modifications of the magnetic or electrochemical properties. [18] Along this front, α-Co II hydroxides (or simonkolleite-like structures) are positioned as key members in the LHs family, because they can be considered as naturally occurring covalently functionalized LHs. They present two coordination environments, octahedral centers-Co II (O h)-within the layers, as in the case of LDHs and tetrahedral ones-Co II (T d)-attached to both sides by 3OH bridges. The fourth position can be used to graft different inorganic to organic ligands (Scheme 1). [19] The electronic and magnetic properties can be tuned by changing ligand and/or Co II (T d) ratio, resulting in more conductive systems (mainly by ligand to metal charge transfer) with higher magnetization temperatures (T M) as to the related LDHs. [20-22] Moreover, as recently reported by our group, in hybrid α-Co II hydroxydicarboxylates, Co 5 (OH) 8 [(CH 2) n (COO) 2 ] with n ranging from 1 to 8, the magnetic behavior can be dramatically modified by changing the parity of the organic linker: whereas odd members present T M < 20 K the even ones have T M > 55 K. [23] These results demonstrate that the nature of the interaction between the inorganic layers and the organic guest is crucial for determinin...

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“…The infrared spectrum of MgAl-NO 3 -LDH exhibited a strong absorption peak at 1351 cm −1 and a small band at 1641 cm −1 , attributed to the stretching vibration mode of interlayer nitrate and bending of adsorbed water, respectively ( Figure 1 B(a)) [ 47 , 48 , 49 ]. The characteristic band at the low energy region, the broad band at 553 cm −1 , was attributed to the metal–oxygen vibration stretching in the framework of the LDH lattice [ 48 ]. On the other hand, the spectrum of MTX-LDH ( Figure 1 B(b)) exhibited characteristic absorption peaks that originated from the organic moiety in MTX.…”

Section: Resultsmentioning

confidence: 99%

Physicochemical Properties and Hematocompatibility of Layered Double Hydroxide-Based Anticancer Drug Methotrexate Delivery System

et al. 2020

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A layered double hydroxide (LDH)-based anticancer delivery system was investigated in terms of crystalline phase, particle size, hydrodynamic radius, zeta potential, etc. through in vitro and in vivo study. Size controlled LDH with anticancer drug methotrexate (MTX) incorporation was successfully prepared through step-by-step hydrothermal reaction and ion-exchange reaction. The MTX-LDH was determined to have a neutral surface charge and strong agglomeration in the neutral aqueous condition due to the surface adsorbed MTX; however, the existence of proteins in the media dramatically reduced agglomeration, resulting in the hydrodynamic radius of MTX-LDH being similar to the primary particle size. The protein fluorescence quenching assay exhibited that MTX readily reduced the fluorescence of proteins, suggesting that the interaction between MTX and proteins was strong. On the other hand, MTX-LDH showed much less binding constant to proteins compared with MTX, implying that the protein interaction of MTX was effectively blocked by the LDH carrier. The in vivo hemolysis assay after intravenous injection of MTX-LDH showed neither significant reduction in red blood cell number nor membrane damage. Furthermore, the morphology of red blood cells in a mouse model did not change upon MTX-LDH injection. Scanning electron microscopy showed that the MTX-LDH particles were attached on the blood cells without serious denaturation of cellular morphology, taking advantage of the cell hitchhiking property.

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FTIR characterization of layered double hydroxides and modified layered double hydroxides

Cited by 56 publications

References 86 publications

Electrochemical study on nickel aluminum layered double hydroxides as high-performance electrode material for lithium-ion batteries based on sodium alginate binder

Electrochemical study on nickel aluminum layered double hydroxides as high-performance electrode material for lithium-ion batteries based on sodium alginate binder

The Role of Covalent Functionalization in the Thermal Stability and Decomposition of Hybrid Layered Hydroxides

Physicochemical Properties and Hematocompatibility of Layered Double Hydroxide-Based Anticancer Drug Methotrexate Delivery System

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