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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Nielsen, Ulla Gro
University of Southern Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (25/25 displayed)
- 2023The effects of low oxidation-reduction potential on the performance of full-scale hybrid membrane-aerated biofilm reactorscitations
- 2021Synthesis and Thermal Degradation of MAl4(OH)12SO4·3H2O with M = Co2+, Ni2+, Cu2+, and Zn2+citations
- 2021Synthesis and Thermal Degradation of MAl 4 (OH) 12 SO 4 ·3H 2 O with M = Co 2+ , Ni 2+ , Cu 2+ , and Zn 2+citations
- 2020The Effect of oxygen defects on the structural evolution of LiVPO4F1−yoy cathode materialscitations
- 2020Remarkable reversal of 13 C-NMR assignment in d 1 , d 2 compared to d 8 , d 9 acetylacetonate complexes:Analysis and explanation based on solid-state MAS NMR and computationscitations
- 2020Remarkable reversal of 13C-NMR assignment in d1, d2 compared to d8, d9 acetylacetonate complexescitations
- 2019Reactivity of magnesium borohydride – Metal hydride composites, γ-Mg(BH4)2-MHx, M = Li, Na, Mg, Cacitations
- 2019Reactivity of magnesium borohydride – Metal hydride composites, $mathrm{γ-Mg(BH_{4})_{2}-MH_{x}, M = Li, Na, Mg, Ca}$citations
- 2019Montmorillonite-surfactant hybrid particles for modulating intestinal P-glycoprotein-mediated transportcitations
- 2019Reactivity of magnesium borohydride – Metal hydride composites, γ-Mg(BH 4 ) 2 -MH x , M = Li, Na, Mg, Cacitations
- 2019Synthesis and Structural Characterization of a Pure ZnAl 4 (OH) 12 (SO 4 )·2.6H 2 O Layered Double Hydroxidecitations
- 2019Synthesis and Structural Characterization of a Pure ZnAl 4 (OH) 12 (SO 4 )·2.6H 2 O Layered Double Hydroxidecitations
- 2018Order in disorder:solution and solid-state studies of [MM] wheels (M = Cr, Al; M = Ni, Zn)citations
- 2018Order in disordercitations
- 2018In situ processing of fluorinated carbon—Lithium fluoride nanocompositescitations
- 2016The role of aluminium as an additive element in the synthesis of porous 4H-silicon carbidecitations
- 2016The role of aluminium as an additive element in the synthesis of porous 4H-silicon carbidecitations
- 2015How the Method of Synthesis Governs the Local and Global Structure of Zinc Aluminum Layered Double Hydroxidescitations
- 2015How the Method of Synthesis Governs the Local and Global Structure of Zinc Aluminum Layered Double Hydroxidescitations
- 2015The effect of preparation method on the proton conductivity of indium doped tin pyrophosphatescitations
- 2014The stoichiometry of synthetic alunite as a function of hydrothermal ageing investigated by solid-state NMR spectroscopy, powder X-ray diffraction, and infrared spectroscopycitations
- 2012Preparation of Nafion 117™-SnO 2 Composite Membranes using an Ion-Exchange Methodcitations
- 2012Preparation of Nafion 117™-SnO2 Composite Membranes using an Ion-Exchange Methodcitations
- 2010Preparation of Nafion 117™-SnO2 Composite Membranes using an Ion-Exchange Method
- 2010Fremstilling af Nafion 117™-SnO 2 kompositmembraner ved brug af en ionbytningsmetode ; Preparation of Nafion 117™-SnO 2 Composite Membranes using an Ion-Exchange Method
Places of action
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article
How the Method of Synthesis Governs the Local and Global Structure of Zinc Aluminum Layered Double Hydroxides
Abstract
Seven zinc aluminum layered double hydroxides (ZnAl LDHs), [Zn1-xAlx (OH)2Ax,nH2O] A = NO3-, Cl- or CO32-, prepared by the urea and co-precipitation synthesis methods were investigated to determine how synthesis parameters (pH, metal ion concentration and post synthesis treatment) affect the local (atomic) and long (global) range structure of the LDH product. Sample composition, purity, crystal defects and other structural aspects of the LDH products were obtained from powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), Micro-Raman, elemental analysis, and solid state 1H, 27Al, and 67Zn NMR spectroscopy. The urea method results in LDHs, which on the global scale are highly crystalline LDHs, but disordered on the local scale. The disorder is correlated with the presence of Al-rich phases, which are undetected by bulk techniques (TEM, PXRD), as they are either defects within the LDH particles or separate phase(s) associated with LDHs. In contrast, samples prepared by co-precipitation with careful pH control and hydrothermal treated have high local order and good crystallinity (large particle size). Our results show that both local (NMR) and bulk techniques are needed to assess the composition of LDHs, as the conventional PXRD and TEM analysis of LDHs failed to identify the many structural defects and/or amorphous phases present.