Structural insights into ion conduction of layered double hydroxides with various proportions of trivalent cations

2013 ◽  
Vol 1 (46) ◽  
pp. 14569 ◽  
Author(s):  
Kohei Miyazaki ◽  
Yuya Asada ◽  
Tomokazu Fukutsuka ◽  
Takeshi Abe ◽  
Leonid A. Bendersky
Keyword(s):  
Layered Double Hydroxides ◽  
Ion Conduction ◽  
Trivalent Cations ◽  
Double Hydroxides ◽  
Structural Insights

Thermodynamical and structural insights of orange II adsorption by MgRAlNO3 layered double hydroxides

2011 ◽  
Vol 184 (5) ◽  
pp. 1016-1024 ◽  
Author(s):  
Mohamed Mustapha Bouhent ◽  
Zoubir Derriche ◽  
Renaud Denoyel ◽  
Vanessa Prevot ◽  
Claude Forano
Keyword(s):  
Layered Double Hydroxides ◽  
Orange Ii ◽  
Double Hydroxides ◽  
Structural Insights

The Effect of Trivalent Cations on the Performance of Mg-M-CO3 Layered Double Hydroxides for High-Temperature CO2 Capture

ChemSusChem ◽  
2010 ◽  
Vol 3 (8) ◽  
pp. 965-973 ◽  
Author(s):  
Qiang Wang ◽  
Hui Huang Tay ◽  
Desmond Jia Wei Ng ◽  
Luwei Chen ◽  
Yan Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Co2 Capture ◽  
Layered Double Hydroxides ◽  
Trivalent Cations ◽  
Double Hydroxides

Electrosynthesis of layered double hydroxides of nickel with trivalent cations

1994 ◽  
Vol 52 (1) ◽  
pp. 93-97 ◽  
Author(s):  
L. Indira ◽  
Mridula Dixit ◽  
P.Vishnu Kamath
Keyword(s):  
Layered Double Hydroxides ◽  
Trivalent Cations ◽  
Double Hydroxides

scholarly journals PREPARATION AND CHARACTERIZATION OF SODIUM LAURYL ETHER SULPHATE MODIFIED LAYERED DOUBLE HYDROXIDES

2015 ◽  
Vol 76 (3) ◽  
Author(s):  
Siti Hasnawati Jamal ◽  
Wan Md Zin Wan Yunus ◽  
Noor Azilah Mohd Kasim ◽  
Ong Keat Khim ◽  
Mansor Ahmad
Keyword(s):  
Layered Double Hydroxides ◽  
Exchange Process ◽  
X Ray Diffraction ◽  
Ion Exchange Process ◽  
Lauryl Ether ◽  
Before And After ◽  
Trivalent Cations ◽  
Co Precipitation ◽  
Double Hydroxides

Layered double hydroxides (LDHs) has attracted much attention of many industrialists as well as academicians as these materials can be used as catalysts, adsorbents, anion exchangers, stabilizers and fillers for polymers. The materials which consist of divalent and trivalent cations, and anions are nontoxic and easy to prepare. In addition, the exchangeability of their anions makes them easy to be modified to increase their hydrophobicity property through anion exchange process using long chain surfactant anions. In this study, sodium lauryl ether sulphate (SLES) modified LDHs was prepared by co precipitation of LDHs and followed SLES ions modification via ion exchange process.  Intercalations of the anions into the LDHs layers were confirmed by X-ray diffraction analysis.  The presence of functional groups before and after modification was studied by FTIR spectrometry. Thermalgravitmeric analysis also was carried out to determine the amount of surfactant intercalated into LDHs.

Acceptorless amine dehydrogenation and transamination using Pd-doped layered double hydroxides

2018 ◽  
Author(s):  
Diana Ainembabazi ◽  
Nan An ◽  
Jinesh Manayil ◽  
Kare Wilson ◽  
Adam Lee ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Oxidation States ◽  
Secondary Amines ◽  
Primary Amines ◽  
Acid Dissolution ◽  
Oxidative Amination ◽  
Strong Function ◽  
Excellent Activity ◽  
High Yields ◽  
Double Hydroxides

<div> <p>The synthesis, characterization, and activity of Pd-doped layered double hydroxides (Pd-LDHs) for for acceptorless amine dehydrogenation is reported. These multifunctional catalysts comprise Brønsted basic and Lewis acidic surface sites that stabilize Pd species in 0, 2+, and 4+ oxidation states. Pd speciation and corresponding cataytic performance is a strong function of metal loading. Excellent activity is observed for the oxidative transamination of primary amines and acceptorless dehydrogenation of secondary amines to secondary imines using a low Pd loading (0.5 mol%), without the need for oxidants. N-heterocycles, such as indoline, 1,2,3,4-tetrahydroquinoline, and piperidine, are dehydrogenated to the corresponding aromatics with high yields. The relative yields of secondary imines are proportional to the calculated free energy of reaction, while yields for oxidative amination correlate with the electrophilicity of primary imine intermediates. Reversible amine dehydrogenation and imine hydrogenation determine the relative imine:amine selectivity. Poisoning tests evidence that Pd-LDHs operate heterogeneously, with negligible metal leaching; catalysts can be regenerated by acid dissolution and re-precipitation.</p> </div> <br>

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