scholarly journals Aqueous miscible organic layered double hydroxides as catalyst precursors for biodiesel synthesis

2020 ◽  
Vol 22 (10) ◽  
pp. 3117-3121
Author(s):  
Chunping Chen ◽  
Maxwell Greenwood ◽  
Jean-Charles Buffet ◽  
Dermot O'Hare
Keyword(s):  
Density Dependence ◽  
Surface Area ◽  
Layered Double Hydroxides ◽  
Sunflower Oil ◽  
Potassium Salt ◽  
Biodiesel Synthesis ◽  
Double Hydroxides

Surface area and basicity density dependence of base-catalysed transesterification of sunflower oil by potassium salt prepared AMO-layered double hydroxides.

Tuneable ultra high specific surface area Mg/Al-CO3layered double hydroxides

2015 ◽  
Vol 44 (37) ◽  
pp. 16392-16398 ◽  
Author(s):  
Chunping Chen ◽  
Aunchana Wangriya ◽  
Jean-Charles Buffet ◽  
Dermot O'Hare
Keyword(s):  
Organic Solvent ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Layered Double Hydroxides ◽  
High Specific Surface Area ◽  
Double Hydroxides

We report the synthesis of tuneable ultra high specific surface area Aqueous Miscible Organic solvent-Layered Double Hydroxides (AMO-LDHs).

scholarly journals A Comparative Study on The Adsorption Behavior of Congo Red on to ZnAl and ZnCr Layered Double Hydroxides

2020 ◽  
Vol 9 (2) ◽  
pp. 108-116
Author(s):  
Tarmizi Taher ◽  
◽  
Nyanyu Ummu Hani ◽  
Neza Rahayu Palapa ◽  
Risfidian Mohadi ◽  
...  
Keyword(s):  
Experimental Data ◽  
Surface Area ◽  
Adsorption Kinetics ◽  
Layered Double Hydroxides ◽  
Congo Red ◽  
Adsorption Process ◽  
Bet Surface Area ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Double Hydroxides

In this work, two synthetic layered double hydroxides (LDH) consists of Zn2+ as M2+ cation with different M3+ cation, i.e., Al3+ and Cr3+ were used as an adsorbent for Congo Red removal aqueous solution. Both Zn-Al and Zn-Cr LDH were characterized by X-ray diffraction, FT-IR, and BET surface area analyzer. The effect of contact time, initial dye concentration, and temperature were evaluated in a batch technique in order to investigate the characteristic of Congo Red adsorption onto both adsorbents. The experimental data were assessed according to the parameter of adsorption kinetics, isotherm, and thermodynamics. The results of LDH characterization showed that Zn-Al LDH has a higher interlayer distance than Zn-Cr LDH, although Zn-Cr LDH has a higher surface area. The FT-IR analysis indicated the interlayer space of both Zn-Cr and Zn-Al LDH was dominated by CO32- as the interlayer anion species. The adsorption kinetics study of Congo Red on both LDH revealed that the adsorption process followed the pseudo-second-order model. For the adsorption isotherm, the experimental data fit well with the Freundlich model rather than the Langmuir model. The thermodynamic study indicated that the adsorption process that occurred on both adsorbents was spontaneous with exothermic nature.

Transition-metal-based layered double hydroxides tailored for energy conversion and storage

2018 ◽  
Vol 6 (1) ◽  
pp. 12-29 ◽  
Author(s):  
Rajkumar Patel ◽  
Jung Tae Park ◽  
Madhumita Patel ◽  
Jatis Kumar Dash ◽  
E. Bhoje Gowd ◽  
...  
Keyword(s):  
Energy Storage ◽  
Transition Metal ◽  
Energy Conversion ◽  
Surface Area ◽  
Layered Double Hydroxides ◽  
Energy Storage Materials ◽  
Storage Materials ◽  
Energy Conversion And Storage ◽  
Double Hydroxides ◽  
And Storage

Transition metal based layered double hydroxides are important energy storage materials. The overall performances of the electrodes are dependent on conductivity, crystallinity, morphology, and surface area.

Thermogravimetry study of the ester interchange of sunflower oil using Mg/Al layered double hydroxides (LDH) impregnated with potassium

2016 ◽  
Vol 127 (3) ◽  
pp. 1863-1867 ◽  
Author(s):  
Ana C. F. Coriolano ◽  
Aline A. Alves ◽  
Renkel A. Araujo ◽  
Regina C. O. B. Delgado ◽  
Florival R. Carvalho ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Sunflower Oil ◽  
Ester Interchange ◽  
Double Hydroxides

scholarly journals Properties of calcium sulfoaluminate cement-based grouting materials with LiAl-layered double hydroxides slurries

2020 ◽  
Vol 29 ◽  
pp. 2633366X2092652 ◽  
Author(s):  
Haiyan Li ◽  
Xianping Wang ◽  
Xuemao Guan ◽  
Dinghua Zou
Keyword(s):  
Compressive Strength ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Layered Double Hydroxides ◽  
Setting Time ◽  
Hydration Products ◽  
Calcium Sulfoaluminate Cement ◽  
Calcium Sulfoaluminate ◽  
Double Hydroxides

In this study, LiAl-layered double hydroxides Lithium aluminum hydrotalcite (LiAl-LDH) with different specific surface area were prepared by the separate nucleation and aging steps (SNAS) method and then were employed to prepare calcium sulfoaluminate cement-based grouting material (CBGM) paste. The influence of LiAl-LDH slurries on fresh and hardened properties of the CBGM paste was investigated in terms of fluidity, stability, setting time, and compressive strength. Additionally, the hydration process and hydration products of the CBGM paste were characterized by hydration heat, X-ray diffraction, differential thermal analysis–thermogravimetry, and Fourier transform infrared analyses. The acquired results illustrated that LiAl-LDH with larger specific surface area led to a faster hydration rate at early age, a lower fluidity, a shorter setting time, and a higher stability. Furthermore, due to the crystal nucleation effect, the addition of LiAl-LDH slurries did not cause a new phase to form but changed the morphology and increased the amount of hydration products, yielding higher compressive strength.

Surface -Area Enhanced Dealuminated Layered Double Hydroxides for Adsorption of Organic Compounds

2017 ◽  
Vol 2 (6) ◽  
pp. 2077-2083 ◽  
Author(s):  
Hullukere ◽  
R. Prakruthi ◽  
Bellundagere ◽  
M. Chandrashekara ◽  
Bangalore ◽  
...  
Keyword(s):  
Surface Area ◽  
Organic Compounds ◽  
Layered Double Hydroxides ◽  
Double Hydroxides

scholarly journals Understanding surface interactions in aqueous miscible organic solvent treated layered double hydroxides

RSC Advances ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 5076-5083 ◽  
Author(s):  
Valentina Erastova ◽  
Matteo T. Degiacomi ◽  
Dermot O'Hare ◽  
H. Chris Greenwell
Keyword(s):  
Organic Solvent ◽  
Surface Area ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Molecular Modelling ◽  
Surface Interactions ◽  
Solvent Treatment ◽  
Double Hydroxide ◽  
Double Hydroxides

Molecular modelling elucidates the mechanism of layered double hydroxide dispersion, increasing surface area, during aqueous miscible organic solvent treatment.

scholarly journals Synthesis of dense porous layered double hydroxides from struvite

2021 ◽  
Vol 23 (4) ◽  
pp. 1616-1620
Author(s):  
W. L. Joyce Kwok ◽  
Hongri Suo ◽  
Chunping Chen ◽  
D. W. Justin Leung ◽  
Jean-Charles Buffet ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Layered Double Hydroxides ◽  
Pore Volume ◽  
Wastewater Treatment Plants ◽  
High Specific Surface Area ◽  
Large Pore Volume ◽  
Double Hydroxides

An atom economic synthesis of dense porous layered double hydroxides (SLDHs) using an undesirable waste in wastewater treatment plants (struvite) is reported. The obtained SLDHs show high specific surface area, large pore volume and high density.

Sign in / Sign up

Export Citation Format

Share Document