Kinetics and equilibrium studies on the treatment of nitric acid with Mg–Al oxide obtained by thermal decomposition of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mrow><mml:msubsup><mml:mrow><mml:mtext>NO</mml:mtext></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow><mml:mo>-</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math>-intercalated Mg–Al layered double hydroxide

Kameda, Tomohito; Fubasami, Yuki; Yoshioka, Toshiaki

doi:10.1016/j.jcis.2011.06.065

Cited by 12 publications

(3 citation statements)

References 32 publications

(37 reference statements)

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“…The calculated cell parameters of the NiAl-LDHs are reported in Table 2. The "003" reflections of all synthesized NiAl-LDHs were observed almost on the same 2(θ) angle of~11.7 • , indicating a basal spacing around 0.88 nm, which correspond to the presence of NO 3 inside LDHs [23,24]. With the variation of ammonium nitrate salt concentration, the intensity and broadness of the reflection peaks vary and diffraction peaks (003) of NiAl-LDH begin to be bit sharper, depicted the enhance crystallinity.…”

Section: Characterizationmentioning

confidence: 90%

Chlorides Entrapment Capability of Various In-Situ Grown NiAl-LDHs: Structural and Corrosion Resistance Properties

et al. 2020

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In this work, various NiAl-LDH thin films, exhibiting specific surface morphologies, were developed directly on aluminum AA 6082 substrate to understand the two main characteristics of layered double hydroxide (LDH), i.e., ion-exchange behavior and barrier properties, which are found to have a significant influence on the LDH corrosion resistance properties. The as-prepared NiAl-LDH films were analyzed through the scanning electronic microscope (SEM), X-ray diffraction (XRD), while the corrosion behavior of the synthesized films was investigated by the electrochemical impedance spectroscopy (EIS) and potentiodynamic curves. The results indicated that NiAl-LDH microcrystals grow in various fashions, from porous relatively flat domains to well-developed platelet structure, with the variation of nickel nitrate to ammonium nitrate salts molar ratios. The LDH structure is observed in all cases and is found to cover the aluminum surface uniformly in the lamellar order. All the developed NiAl-LDHs are found to enhance the corrosion resistance of the aluminum substrate, specifically, a well-developed platelet structure is found to be more effective in chloride adsorptive and entrapment capabilities, which caused higher corrosion resistance compared to other developed NiAl-LDHs. The comparison of the synthesized NiAl-LDH morphologies on their ion-exchange capabilities, barrier effect and their combined effect on corrosion resistance properties is reported.

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Section: Characterizationmentioning

confidence: 90%

Chlorides Entrapment Capability of Various In-Situ Grown NiAl-LDHs: Structural and Corrosion Resistance Properties

et al. 2020

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“…Their general formula can be represented as . In recent years, LDHs have received considerable attention because of their application as catalysts [3], [4], ion exchangers [5], adsorbents [6], [7], corrosion resistance films [8], precursors [4], [9], drugs [10], [11] and LDHs-polymer composites [12]–[15]. In particular, the use of LDHs as polymer halogen-free flame retardants is a rather promising field of application [16]–[18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Rare Earth Ions on the Properties of Composites Composed of Ethylene Vinyl Acetate Copolymer and Layered Double Hydroxides

Wang

Zhao

et al. 2012

PLoS ONE

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BackgroundThe study on the rare earth (RE)-doped layered double hydroxides (LDHs) has received considerable attention due to their potential applications in catalysts. However, the use of RE-doped LDHs as polymer halogen-free flame retardants was seldom investigated. Furthermore, the effect of rare earth elements on the hydrophobicity of LDHs materials and the compatibility of LDHs/polymer composite has seldom been reported.Methodology/Principal FindingsThe stearate sodium surface modified Ni-containing LDHs and RE-doped Ni-containing LDHs were rapidly synthesized by a coprecipitation method coupled with the microwave hydrothermal treatment. The influences of trace amounts of rare earth ions La, Ce and Nd on the amount of water molecules, the crystallinity, the morphology, the hydrophobicity of modified Ni-containing LDHs and the adsorption of modifier in the surface of LDHs were investigated by TGA, XRD, TEM, contact angle and IR, respectively. Moreover, the effects of the rare earth ions on the interfacial compatibility, the flame retardancy and the mechanical properties of ethylene vinyl acetate copolymer (EVA)/LDHs composites were also explored in detail.Conclusions/SignificanceS-Ni0.1MgAl-La displayed more uniform dispersion and better interfacial compatibility in EVA matrix compared with other LDHs. Furthermore, the S-Ni0.1MgAl-La/EVA composite showed the best fire retardancy and mechanical properties in all composites.

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“…Layered double hydroxides (LDHs), also referred to as anionic clays or hydrotalcite-like compounds. In recent years, LDHs have received considerable attention because of their application as catalysts [1], ion exchangers [2], adsorbents [3], corrosion resistance films [4] and LDHs-polymer composites [5,6]. In particular, the use of LDHs as polymer halogen-free flame retardants is a rather promising field of application [7,8].…”

Section: Introductionmentioning

confidence: 99%

Improved Flame Retardancy and Mechanical Properties of Composite Material S-NiMgAl-Y/EVA

Wang

et al. 2012

AMR

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The stearate surface modified LDHs S-NiMgAl-Y was rapidly synthesized based on the coprecipitation coupled with the microwave hydrothermal treatment. The cone calorimeter data confirmed that composite S-NiMgAl-Y/EVA has the good functions of both the ﬂame retardancy and smoke/toxic gas suppression. The tensile strength of S-NiMgAl-Y/EVA was increased to the maximum value of 25.6 MPa when the addition of 10 wt.% S-NiMgAl-Y to EVA. This value is markedly larger than that of the pristine EVA equaling 20.8 MPa. The composite material developed in the present work greatly contributes to the processing and application of the fire retardant material.

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Kinetics and equilibrium studies on the treatment of nitric acid with Mg–Al oxide obtained by thermal decomposition of NO3--intercalated Mg–Al layered double hydroxide

Cited by 12 publications

References 32 publications

Chlorides Entrapment Capability of Various In-Situ Grown NiAl-LDHs: Structural and Corrosion Resistance Properties

Chlorides Entrapment Capability of Various In-Situ Grown NiAl-LDHs: Structural and Corrosion Resistance Properties

Effect of Rare Earth Ions on the Properties of Composites Composed of Ethylene Vinyl Acetate Copolymer and Layered Double Hydroxides

Improved Flame Retardancy and Mechanical Properties of Composite Material S-NiMgAl-Y/EVA

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