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Showing 1 to 11 of 11 for “"Layered double hydroxide"”.
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Mg-Al Layered Double Hydroxide: A Potential Nanofiller and Flame-Retardant for Polyethylene
… the investigation of magnesium aluminum based layered double hydroxide (LDH) as a potential nanofiller and flame-retardant for polymers with special reference to polyethylene. LDH is a mixed hydroxide of di- and trivalent metal ions that crystallizes in the form of mineral brucite. The basic …
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Study of Substituted Benzenesulfonate-Containing Layered Double Hydroxides and Investigation of the Hexamethylenetetramine Route of LDH Synthesis
… groups were successfully incorporated into layered double hydroxides of two different compositions, 2:1 Mg-Al LDH and 2:1 Zn-Al LDH. These parent materials were also doped with small amounts of nickel and the differences in the two systems were studied. The hexamethylenetetramine route of …
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Layered Double Hydroxides: Morphology, Interlayer Anion, and the Origins of Life
The preparation of layered double hydroxides via co-precipitation of a divalent/trivalent metal solution against a base results in 1 mm LDH particles with a disorganized metal lattice. Research was performed to address these morphological issues using techniques such as Ostwald ripening and …
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Layered Double Hydroxides: Synthesis, Characterization, and Interaction of Mg-Al Systems with Intercalated Tetracyanonickelate(II)
… anion was intercalated into 2:1 and 3:1 Mg-Al layered double hydroxide systems (LDHs). In the 2:1 material, the anion holds itself at an angle of about 30° to the layers, whereas in the 3:1 material it lies more or less parallel to the layers. This is confirmed by orientation effects in the …
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Modification of clays with ionic liquids for polymer nanocomponents
… liquids intercalated. In anionic exchange with layered double hydroxide clays, a synthetic hydrotalcite susceptible to exchange of its interlamellar carbonate ions with a variety of other anions, was selected. Reagents having anions differing in size and structure included two colorless ionic …
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Layered Double Hydroxides and the Origins of Life on Earth
… research performed by the author and co-workers. Layered Double Hydroxide (LDH) systems are anion-exchanging clays that have the general formula M(II)xM(III)(OH)(2x+2)Y, where M(II) and M(III) are any divalent and trivalent metals, respectively. Y can be nearly any anion, although modern naturally …
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The Chemodenitrification of Nitrate by Green Rust and Mackinawite and its Geochemical Implications
… relevant in the presence of green rust (GR), a layered double hydroxide Fe(II)/Fe(III) mineral. High anion (SO42-/Cl-) concentrations could arrest chemodenitrification, most likely through competition for sorption, and hence electron transfer, sites. Stable N and O isotope studies indicated that …
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Sviluppo di biosensori: modifiche di superfici elettrodiche e sistemi di immobilizzazione enzimatica
… glucose oxidase (GOx) was immobilized on a layered double hydroxide Ni/Al-NO3 LDH during the electrosynthesis, which was followed by crosslinking with glutaraldehyde (GA) vapours or with GA and bovine serum albumin (GABSA) to avoid the enzyme release. The electrochemical reaction was carried …
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The effect of layered double hydroxides on the vulcanisation and properties of elastomer compounds
… in the rubber are desirable. In this work, layered double hydroxides (LDHs) were investigated as alternative crosslinking agents to ZnO in order to either reduce or eliminate Zn in the vulcanisation formulation. Three different stearate modified LDHs, namely CaAl-St, CaZnAl-St and CaFeAl-St …
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APPLICATION OF LAYERED DOUBLE HYDROXIDES IN SOLID-PHASE EXTRACTION
… one of these innovations, dissolvable sorbents, layered double hydroxides (LDHs) and their derivants (e.g., layered double oxide (LDO), Fe3O4@LDO, Fe3O4@LDH, (EDTA-Ni)-LDH), with different structures and properties, in some special and new SPE modes (e.g., dispersive solid-phase extraction …
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Earth Abundant Catalysts for Water Electrolysis at Low Overpotentials
… SI-SECM studies revealed that the Ni0.8Fe0.2OOH layered double hydroxide (LDH), a structure known to have electrolyte permeability, had an anomalously high active site density (4500 sites nm-2) compared to that of the crystalline Ni0.8:Fe0.2 (500 sites nm-2), from which it was synthesized by …