The role of trivalent cations and interlayer anions on the formation of layered double hydroxides in an oxic-CO2 medium

2012 ◽  
Vol 263 ◽  
pp. 633-639 ◽  
Author(s):  
Susanta Paikaray ◽  
M. Jim Hendry
Keyword(s):  
Layered Double Hydroxides ◽  
Trivalent Cations ◽  
Double Hydroxides

Exploring the role of stearic acid in modified zinc aluminum layered double hydroxides and their acrylonitrile butadiene rubber nanocomposites

2014 ◽  
pp. n/a-n/a ◽  
Author(s):  
Subramani Bhagavatheswaran Eshwaran ◽  
Debdipta Basu ◽  
Sankar Raman Vaikuntam ◽  
Burak Kutlu ◽  
Sven Wiessner ◽  
...  
Keyword(s):  
Stearic Acid ◽  
Layered Double Hydroxides ◽  
Butadiene Rubber ◽  
Acrylonitrile Butadiene Rubber ◽  
Rubber Nanocomposites ◽  
Double Hydroxides

scholarly journals Screening Different Divalent and Trivalent Metals Containing Binary and Ternary Layered Double Hydroxides for Optimum Phosphate Uptake

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Sattam Fahad Almojil ◽  
Mohamed Abdelhalim Othman
Keyword(s):  
Layered Double Hydroxides ◽  
Phosphate Uptake ◽  
Synergistic Effects ◽  
Bet Surface Area ◽  
Primary Role ◽  
Specific Element ◽  
Phosphate Ion ◽  
Sorbent Materials ◽  
Double Hydroxides

Abstract The elements constituting a layered double hydroxides material provide many alternatives for its optimization. Ten different layered double hydroxides materials with various combinations of Ni, Cu, Zn, Al, Cr, and Fe elements were studied as sorbent materials for phosphate ion. The type of element used in the layered double hydroxides affected the uptake capacity of phosphate. The influence of a specific element alone was not the primary role of enhancing the sorption performance of phosphate ion on the LDHs material. However, using specific two or three elements together is the key to achieve the best result due to synergistic effects. BET surface area of the sorbent showed no correlation with phosphate uptake. From the examined materials, Four layered double hydroxides of Cu-Zn-Cr, Zn-Cr, Ni-Al, and Cu-Ni-Cr showed high phosphate sorption capability. Sorption equilibrium isotherm, reaction kinetics, and desorption of phosphate from the sorbent materials were also investigated.

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

scholarly journals In-situ layered double hydroxides on Mg−Ca alloy: Role of calcium in magnesium alloy

2021 ◽  
Vol 31 (6) ◽  
pp. 1612-1627
Author(s):  
Yu XIA ◽  
Liang WU ◽  
Wen-hui YAO ◽  
Meng HAO ◽  
Jing CHEN ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Layered Double Hydroxides ◽  
Double Hydroxides

scholarly journals AgCl-ZnAl Layered Double Hydroxides as Catalysts with Enhanced Photodegradation and Antibacterial Activities

Inorganics ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 120 ◽  
Author(s):  
Morena Nocchetti ◽  
Monica Pica ◽  
Berardo Ridolfi ◽  
Anna Donnadio ◽  
Elisa Boccalon ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Degradation Process ◽  
Antibacterial Activities ◽  
Positive Control ◽  
Active Species ◽  
Interlayer Region ◽  
Surface Modified ◽  
Double Hydroxides ◽  
Crystalline Domains

Surface-modified ZnAl layered double hydroxides (LDHs) were prepared by reaction of AgNO3, with both ZnAlCl (LDH1) and ZnAlCO3 exchanged on the surface with chloride anions (LDH3). In this way, AgCl nanoparticles with crystalline domains ranging from 40 to 100 nm were grown on the LDH surface. An additional sample was prepared by partial reduction of silver to obtain Ag@AgCl-LDH (LDH2). The composites were tested as catalysts in Rhodamine B (RhB) degradation, wherein LDH2 showed complete cleavage of RhB after 45 min of irradiation versus 70 min needed in the presence of AgCl. This time decreased to 35 min for LDH1 and 15 min for LDH3, underlining the role of the AgCl dimensions and anion in the interlayer region. Studies on the reactive species involved in the degradation process revealed that, for all catalysts, O2·− was the main active species, while, to some extent, holes contribute to the activity of the LDH3. Finally, the composites showed high bactericidal activity, under irradiation, against Escherichia coli, comparable with that of Gentamicin, the positive control. A synergic effect of silver released from the composites and the production of reactive oxygen species was considered.

On the role of ultrasound and mechanical stirring for iodide adsorption by calcined layered double hydroxides

2014 ◽  
Vol 91-92 ◽  
pp. 70-78 ◽  
Author(s):  
L. Iglesias ◽  
M.G. Álvarez ◽  
R.J. Chimentão ◽  
J.L. Leganés ◽  
F. Medina
Keyword(s):  
Layered Double Hydroxides ◽  
Mechanical Stirring ◽  
Double Hydroxides

Bridging NiCo layered double hydroxides and Ni3S2 for bifunctional electrocatalysts: The role of vertical graphene

2021 ◽  
Vol 415 ◽  
pp. 129048
Author(s):  
Xiao Zhang ◽  
Jiajun Fan ◽  
Xunyu Lu ◽  
Zhaojun Han ◽  
Claudio Cazorla ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Bifunctional Electrocatalysts ◽  
Double Hydroxides
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