Poly(styrene sulfonate) layered double hydroxide nanocomposites. Stability and subsequent structural transformation with changes in temperatureElectronic supplementary information (ESI) available additional: XRD patterns and EDX analyses. See http://www.rsc.org/suppdata/jm/b2/b208551h/

2003 ◽  
Vol 13 (2) ◽  
pp. 258-264 ◽  
Author(s):  
El Mostafa Moujahid ◽  
Jean-Pierre Besse ◽  
Fabrice Leroux
Keyword(s):  
Layered Double Hydroxide ◽  
Structural Transformation ◽  
Supplementary Information ◽  
Styrene Sulfonate ◽  
Edx Analyses ◽  
Xrd Patterns ◽  
Poly Styrene Sulfonate ◽  
Double Hydroxide

Intercalation of Layered Double Hydroxide Polymer Nanocomposites

2002 ◽  
Author(s):  
C. Monica Hudson
Keyword(s):  
Polymer Nanocomposites ◽  
Layered Double Hydroxide ◽  
Sodium Dodecyl ◽  
X Ray Diffraction ◽  
Anionic Polymer ◽  
X Ray ◽  
Styrene Sulfonate ◽  
Poly Styrene Sulfonate ◽  
Double Hydroxide ◽  
Carbonate Anion

Magnesium-aluminum (Mg-Al) based layered double hydroxide (LDH) polymer nanocomposites were developed through the implementation of a rehydration technique. Organic anionic surfactant sodium dodecyl sulfate (SDS) and an anionic polymer, poly(styrene sulfonate) (PSS) were used for intercalation in the cationic intergallery spacing of LDH. This rehydration technique was performed by calcination of the LDH precursor for removal of carbonate anion followed by rehydration of organic anionic phase in a nitrogen rich atmosphere. The resulting nanocomposites were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and powder x-ray diffraction (XRD).

scholarly journals Synthesis and characterization of two-dimensional (2D) nanosheet zinc aluminum layered double hydroxide (Zn/Al LDH) via an alkali-free route

2021 ◽  
Vol 15 (1) ◽  
pp. 82
Author(s):  
Rabiatul Adawiyah Mohd Agus ◽  
Siti Khatijah Deraman ◽  
Nazrizawati A. Tajuddin
Keyword(s):  
Layered Double Hydroxide ◽  
Nitrate Solution ◽  
Zinc Nitrate ◽  
Molar Ratio ◽  
Molar Ratios ◽  
Sem Image ◽  
Constant Ph ◽  
Xrd Patterns ◽  
Double Hydroxide

The effect of different molar ratios on the synthesis of zinc aluminium layered double hydroxide (Zn/Al LDH) via an alkali-free route was carried out in this research. This method was prepared by mixing zinc nitrate solution, aluminium nitrate solution, and ammonium carbonate solution at a constant pH of 8.5 with a spanning ratio of Zn to Al from 4:1, 3:1, and 2:1. The XRD patterns showed crystal nanostructure of Zn/Al LDHs was successfully formed. The lattice parameters (a and c) were slightly increased with the increasing of Zn/Al molar ratio. A larger hexagonal platelet is observed in the SEM image align with the high molar ratio of Zn/Al synthesized. The same trend has been observed in the FTIR spectra.   Keywords: Zn/Al LDH, alkali-free route, different molar ratio, XRD, SEM, FTIR

scholarly journals Efficient Removal of Methylene Blue by Adsorption Using Composite Based Ca/Al Layered Double Hydroxide-Biochar

2020 ◽  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Adsorption Capacity ◽  
Layered Double Hydroxide ◽  
Adsorption Process ◽  
Efficient Removal ◽  
X Ray ◽  
Edx Analyses ◽  
As Adsorption ◽  
Double Hydroxide

<p>Composite based Ca/Al layered double hydroxide and biochar was prepared using mixing coprecipitation method at pH 10. Composite and the starting materials was characterized using X-ray, FTIR, BET, thermal, and SEM-EDX analyses. Furthermore, composite was used as adsorbent of methylene blue from aqueous solution. Several factors that influencing the adsorption process was investigated such as adsorption time, initial concentration, and temperature adsorption. The performance of composite as adsorbent was evaluated by reusability process. The results showed that composite has diffraction peak at 9.82, 17.99, 19.86, 20.55, 29.32, 30.95, 32.65, 36.61, 37.00, 43.49, 47.15, 55.12, and 56.12 deg, which was based on diffraction of Ca/Al layered double hydroxide and biochar as starting materials. The surface area of composite was 158.291 m2/g and largely higher than starting materials. The morphology of composite also shows regularity shape than Ca/Al layered double hydroxide and biochar. Adsorption of methylene blue on composite showed that higher adsorption capacity (32.535 mg/g) than starting materials. The reusability of adsorbent showed that composite can be used several times ad adsorbent without loss adsorption capacity and these phenomena indicated composite is excellent material to remove dye from aqueous solution.</p>

Adsorption of Phthalate Esters from Aqueous Solution by Mg–Al Layered Double Hydroxide

2012 ◽  
Vol 455-456 ◽  
pp. 939-946
Author(s):  
Long Wang ◽  
Xu Gao ◽  
Jin Song Guo ◽  
Wen Zhang ◽  
Yang Xu
Keyword(s):  
Activated Carbon ◽  
Layered Double Hydroxide ◽  
Phthalate Esters ◽  
Dioctyl Phthalate ◽  
X Ray Diffraction ◽  
Activated Carbon Adsorption ◽  
Before And After ◽  
Pseudo Second Order ◽  
Xrd Patterns ◽  
Double Hydroxide

Mg–Al layered double hydroxide (Mg–Al LDH) was investigated for adsorption of dimethyl phthalate (DMP), di-(2-ethylhexyl) phthalate (DEHP) and dioctyl phthalate (DOP) from water samples. The adsorption capability of the Mg–Al LDH was compared with that of activated carbon. Adsorption of the three phthalate esters (PAEs) fitted pseudo-second-order kinetics, and the Langmuir or Freundlich equations described the adsorption isotherms. Adsorption of the PAEs was exothermic, and was mainly dominated by physical interactions including dispersion, induction, orientation and hydrogen bond forces. Compared with activated carbon, the Mg–Al LDH removal efficiency of the relatively small PAE, DMP, was about 20 % lower. The removal efficiencies of the larger PAEs, DEHP and DOP, were about the same on both sorbents. After three regeneration cycles of the Mg–Al LDH at 300 °C for 2 h, its adsorption capacity remained above 90 %. The infrared (IR) spectra and the X-ray diffraction (XRD) patterns for the Mg-Al-LDH before and after regeneration showed no large differences, which indicates that the structure of the Mg–Al LDH does not change after regeneration.

Intercalation of Collagen and Soybean Peptides into Zn–Al Layered Double Hydroxide

2008 ◽  
Vol 8 (1) ◽  
pp. 428-431 ◽  
Author(s):  
Sumio Aisawa ◽  
Aiko Yasutake ◽  
Satoshi Takahashi ◽  
Hidetoshi Hirahara ◽  
Eiichi Narita
Keyword(s):  
Layered Double Hydroxide ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Collagen Peptides ◽  
Transmission Electron ◽  
New Type ◽  
Diffraction Peaks ◽  
Xrd Patterns ◽  
Double Hydroxide

In order to develop a new type biocompatible organic/inorganic nanohybrid material, an intercalation of collagen peptides (CP) and soybean peptide (SP) into Zn–Al layered double hydroxide (LDH) by the coprecipitation reaction has been investigated. The peptide/LDH has been characterized by chemical analysis, powder X-ray diffraction (XRD), Raman spectroscopy, thermal gravimetric analysis (TG) and transmission electron microscopy (TEM). According to the XRD patterns and Raman spectra, the solid products were found to contain peptide and to show broad diffraction peaks with LDH structures. The CP/LDH and SP/LDH possess the expanding LDH structure, d00l = 2–3 nm, confirming that both peptides were intercalated into the LDH interlayer space with low organized stacking arrangement.

Removal of Methyl Orange from Aqueous Solutions by Using Zn-Al Layered Double Hydroxide as Photocatalyst

2015 ◽  
Vol 1 (2) ◽  
pp. 36-41
Author(s):  
Laura Cocheci ◽  
◽  
Ancuta-Corina Marcu ◽  
Paul Barvinschi ◽  
Aniela Pop
Keyword(s):  
Methyl Orange ◽  
Aqueous Solutions ◽  
Layered Double Hydroxide ◽  
Double Hydroxide
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