The influence of mixed anionic composition of Mg–Al hydrotalcites on the thermal decomposition mechanism based on in situ study

Węgrzyn, Agnieszka; Rafalska-Łasocha, Alicja; Majda, Dorota; Dziembaj, R.; Papp, H.

doi:10.1007/s10973-009-0190-5

Cited by 35 publications

(15 citation statements)

References 37 publications

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“…1A. The obtained precursors exhibit a typical crystalline hydrotalcite-like structure belonging to the space group R3m in the trigonal symmetry (Węgrzyn et al, 2010). It should be mentioned that for all the as-synthetized samples very similar XRD patterns were recorded.…”

Section: Resultsmentioning

confidence: 62%

Hydrotalcite derived (Cu, Mn)–Mg–Al metal oxide systems doped with palladium as catalysts for low-temperature methanol incineration

Jabłońska

Chmielarz

Węgrzyn

et al. 2015

Applied Clay Science

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Section: Resultsmentioning

confidence: 62%

Hydrotalcite derived (Cu, Mn)–Mg–Al metal oxide systems doped with palladium as catalysts for low-temperature methanol incineration

Jabłońska

Chmielarz

Węgrzyn

et al. 2015

Applied Clay Science

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“…1. All precursors exhibit the typical crystalline hydrotalcite-like structure belonging to the space group R3 m [16]. Cell parameters were calculated using a position of 110 reflection: a = 2(d 110 ) and positions of basal reflections:…”

Section: Resultsmentioning

confidence: 99%

“…The parameter a corresponds to the cation-cation distance within the brucite-like layer, while the parameter c is related to the thickness of the brucite-like layer and the interlayer distance [16]. Additionally, crystal sizes were calculated from the Scherrer equation D = 0.89 k/b cosh, where D is the crystallite size, k-the X-ray wavelength, b-the line broadening and hthe Bragg angle.…”

Section: Resultsmentioning

confidence: 99%

Selective Catalytic Oxidation (SCO) of Ammonia to Nitrogen over Hydrotalcite Originated Mg–Cu–Fe Mixed Metal Oxides

et al. 2011

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Mg-Cu-Fe oxide systems, obtained from hydrotalcite-like precursors, were tested as catalysts for the selective catalytic oxidation (SCO) of ammonia. Copper containing catalysts were active in low-temperature SCO processes; however, their selectivity to nitrogen significantly decreased at higher temperatures. The optimum composition of the catalyst to guarantee high activity and selectivity to N 2 was proposed. Temperature-programmed experiments, SCO catalytic tests performed with various contact times and additional tests on the samples in the selective catalytic reduction of NO with ammonia showed that the SCO process over the studied calcined hydrotalcites proceeds according to the internal SCR mechanism and oxidation of ammonia to NO is a rate-determining step in the low-temperature range.

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“…[13][14] Interest in the thermal decomposition and decomposition products of MgAl-LDH has arisen of late due to their wide applicability in the preparation of new anionic forms and pillared structures. [15][16] Therefore, the aim of this study was to synthesize the sepiocite nanoclay enabled by the thermal-phase transformation of MgAl(CO 3 )-LDH and to characterize its crystal structure and properties. Sepiocite was prepared via heat treatment, followed by hydration.…”

Section: Introductionmentioning

confidence: 99%

Sepiocite, Sepiolite-Like Nanoclay Derived from Hydrotalcite-Like Layered Double Hydroxide

Park¹,

Shul²

2011

j nanosci nanotechnol

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Sepiocite, a synthetic sepiolite-like nanoclay, was derived from hydrotalcite-like Mg2Al(CO3)0.5-layered double hydroxide (LDH) under phase transformation at 270 +/- 3 degrees C. The crystal structure of sepiocite is conceptually very similar to that of sepiolite derived from montmorillonite clay because sepiocite is formed through the alternation of the blocks and tunnels along the crystallographic c-axis, with a partial dehydroxylation of the octahedral Mg-(OH)-Al configuration into tetrahedral ones. Three important findings regarding sepiocite were arrived at: (i) its high specific surface area of 128.25 m2/g with an average particle size of 200 nm, which is approimately equal to 3.5 times larger than the specific surface area of the pristine LDH (34.21 m2/g); (ii) its non-swelling property; and (iii) its strongly reduced anion-exchange capacity.

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The influence of mixed anionic composition of Mg–Al hydrotalcites on the thermal decomposition mechanism based on in situ study

Cited by 35 publications

References 37 publications

Hydrotalcite derived (Cu, Mn)–Mg–Al metal oxide systems doped with palladium as catalysts for low-temperature methanol incineration

Hydrotalcite derived (Cu, Mn)–Mg–Al metal oxide systems doped with palladium as catalysts for low-temperature methanol incineration

Selective Catalytic Oxidation (SCO) of Ammonia to Nitrogen over Hydrotalcite Originated Mg–Cu–Fe Mixed Metal Oxides

Sepiocite, Sepiolite-Like Nanoclay Derived from Hydrotalcite-Like Layered Double Hydroxide

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