Synthesis of NiAl layered double hydroxides intercalated with aliphatic dibasic anions and their exchange with heptamolybdate

Aguilera, Luis; Palacio, Luz Amparo; Faro, Arnaldo C.

doi:10.1016/j.clay.2019.04.021

Cited by 13 publications

(9 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NiAl-LDH was prepared according a previously reported method [36]. Ni(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 ·9H 2 O were uniformly dissolved in 200 mL deionised water with a Ni 2+ :Al 3+ molar ratio of 3:1, which were then transferred to a 500 mL three-neck flask equipped with a strong mechanical stirrer and circulating water cooling.…”

Section: Methodsmentioning

confidence: 99%

Facile fabrication of NiAl-LDH and its application in TPU nanocomposites targets for reducing fire hazards

Liu

et al. 2021

Plastics, Rubber and Composites

View full text Add to dashboard Cite

In this study, nickel-aluminium layered double hydroxide (NiAl-LDH) was prepared and characterised. NiAl-LDH was incorporated into thermoplastic polyurethane (TPU) to prepare a series of TPU/NiAl-LDH nanocomposites using solution mixing technology. Thermogravimetric analysis revealed that the addition of NiAl-LDH increased the thermal stability of TPU/NiAl-LDH nanocomposite at high temperatures. Kinetic analysis of the nanocomposites was conducted via the Coats-Redfern method. Thermogravimetric infrared spectroscopy was carried out to investigate gaseous pyrolysis products in degradation process of TPU/NiAl-LDH nanocomposites. TPU/NiAl-LDH nanocomposites showed a significant decrease in CO, hydrocarbon, and aromatic compound intensities than those of pure TPU, indicating that NiAl-LDH can effectively reduce the fire hazard associated with TPU nanocomposites. Furthermore, X-ray photoelectron spectroscopy, scanning electron microscopy, and Raman spectroscopy were used to analyse char residues of TPU/NiAl-LDH nanocomposites. TPU/NiAl-LDH nanocomposites produced a denser char layer with a significantly enhanced graphitisation degree, which inhibited substance and heat transfer during combustion.

show abstract

Section: Methodsmentioning

confidence: 99%

Facile fabrication of NiAl-LDH and its application in TPU nanocomposites targets for reducing fire hazards

Liu

et al. 2021

Plastics, Rubber and Composites

View full text Add to dashboard Cite

show abstract

“…In addition, ion exchange method can also be used to exchange anions between layers, and this property is applied for efficient fabrication of anion intercalated layered double hydroxides (LDHs). [32][33][34] To prepare a desired anionic intercalated LDH, the LDH should be a chloride or nitrate-based source so that the incoming anion can be exchanged with chloride or nitrate ion in its interlayer.…”

Section: Ion Exchange Intercalationmentioning

confidence: 99%

Regulating Intercalation of Layered Compounds for Electrochemical Energy Storage and Electrocatalysis

Yang

Tamirat

Bin

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Layered materials have received extensive attention for widespread applications such as energy storage and conversion, catalysis, and ion transport owing to their fast ion diffusion, exfoliative feature, superior mechanical flexibility, tunable bandgap structure, etc. The presence of large interlayer space between each layer enhances intercalation of the guest ion or molecule, which is beneficial for fast ion diffusion and charge transport along the channels. This intercalation reaction of layered compounds with guest species results in material with improved mechanical and electronic properties for efficient energy storage and conversion, catalysis, ion transport, and other applications. This review extensively discusses the intercalation of guest ionic or molecular species into layered materials used for various types of applications. It assesses the intercalation strategies, mechanism of ionic or molecular intercalation reactions, and highlights recent advancements. The electrochemical performances of several typical intercalated materials in batteries, supercapacitors, and electrocatalytic systems have been thoroughly discussed. Moreover, the challenges in the design and intercalation of layered materials, as well as prospects of future development are highlighted.

show abstract

“…In all samples, patterns of crystalline materials with reflections characteristic of LDHtype compounds were identified. The four intense and well-defined peaks present at angles 2θ < 30 • correspond to the basal distances of the planes (003), (006), (009) and (0012) [54,55]. Further, the two wider and less intense peaks at higher angles (2θ > 30 • ) are also characteristic of LDHs, corresponding to (012) and (110) reflections [54,55].…”

Section: Characterization Of Precursors and Catalystsmentioning

confidence: 94%

“…According to the catalysts EDX elemental analysis results from Table 1, the molar ratio x = Al/(Al + Ni + Cu) differed from the theoretical value (0.7), indicating a lower incorporation of Al 3+ in the structure of the materials. This can be explained by the high aluminum content that was initially intended to be incorporated into the material, and which is normally not achieved, as commonly reported in the literature [38,54]. Therefore, the successive washings with water to eliminate nitrates and sodium may have caused aluminum leaching.…”

Section: Characterization Of Precursors and Catalystsmentioning

confidence: 99%

Hydrogen-Free Deoxygenation of Oleic Acid and Industrial Vegetable Oil Waste on CuNiAl Catalysts for Biofuel Production

Sabino,

Liborio,

Arias

et al. 2023

Energies

View full text Add to dashboard Cite

The pyrolysis of vegetable oil waste is an alternative way to convert biomass into high-quality second-generation biofuels, with social, economic and environmental sustainability. The present work deals with the pyrolysis of oleic acid as a model compound and an industrial vegetable oil residue on CuNiAl mixed oxide catalysts, derived from layered double hydroxides. Reactions of the oils pre-adsorbed on the catalysts (catalyst:oil mass ratio of 5:1) were performed at 550 °C on a micro-pyrolysis system and the analyses of volatile products were carried out online using GC/MS. Copper addition to NiAl catalysts increased the cracking of oleic acid. Increasing copper content also decreased the formation of aromatics and coke precursors, as well as oxygenated compounds. The CuNiAl catalyst with a Cu/Ni ratio of 0.4 showed strong catalytic activity in the conversion of an industrial vegetable oil residue with a high volume of free fatty acids produced. Compared to the non-catalytic reaction, the catalyst reduced the content of oxygenates and increased the content of hydrocarbons, particularly in the gasoline range (C5–C9). The CuNiAl oxide catalyst was able to convert vegetable oil residues into hydrocarbons in the range of gasoline, kerosene and diesel, and also linear alkylbenzenes as chemical precursors for surfactant production.

show abstract

Synthesis of NiAl layered double hydroxides intercalated with aliphatic dibasic anions and their exchange with heptamolybdate

Cited by 13 publications

References 44 publications

Facile fabrication of NiAl-LDH and its application in TPU nanocomposites targets for reducing fire hazards

Facile fabrication of NiAl-LDH and its application in TPU nanocomposites targets for reducing fire hazards

Regulating Intercalation of Layered Compounds for Electrochemical Energy Storage and Electrocatalysis

Hydrogen-Free Deoxygenation of Oleic Acid and Industrial Vegetable Oil Waste on CuNiAl Catalysts for Biofuel Production

Contact Info

Product

Resources

About