Materials design and control synthesis of the layered double hydroxide with the desired basal spacing

2015 ◽  
Vol 144 ◽  
pp. 11-16 ◽  
Author(s):  
Pan Xiong ◽  
Xiaobo Ji ◽  
Xin Zhao ◽  
Wei Lv ◽  
Taiang Liu ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Materials Design ◽  
Control Synthesis ◽  
Basal Spacing ◽  
Double Hydroxide ◽  
And Control

scholarly journals Mechanical and Morphological Properties of Poly-3-hydroxybutyrate/Poly(butyleneadipate-co-terephthalate)/Layered Double Hydroxide Nanocomposites

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Yen Leng Pak ◽  
Mansor Bin Ahmad ◽  
Kamyar Shameli ◽  
Wan Md Zin Wan Yunus ◽  
Nor Azowa Ibrahim ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Morphological Properties ◽  
Basal Spacing ◽  
Casting Method ◽  
Binary Blend ◽  
Elongation At Break ◽  
Ion Exchange Reaction ◽  
Solution Casting Method ◽  
Coprecipitation Technique ◽  
Double Hydroxide

Nanocomposites of poly-3-hydroxybutyrate/poly(butyleneadipate-co-terephthalate)/layered double hydroxide (PHB/PBAT/LDH) were prepared from a binary blend of PHB/PBAT and stearate-Zn3Al LDH via a solution casting method using chloroform as solvent in this study. The pristine Zn3Al LDH was synthesized from nitrate salts solution at pH 7 by using coprecipitation technique and then was modified by stearate anions surfactant via ion exchange reaction. As a result, the basal spacing of the LDH was increased from 8.77 to 24.94 Å after the modification. Intercalated nanocomposites were formed due to the presence of diffraction peak in XRD diffractograms. The infrared spectrum of stearate-Zn3Al LDH exhibited the existence of stearate anions in the synthesized Zn3Al LDH. Mechanical properties with 2 wt% stearate-Zn3Al LDH loading nanocomposites showed 56 wt% improvements in elongation at break compared to those of the blend.

scholarly journals Physicochemical Study of 3,4-Dichlorophenoxyacetic Acid Intercalated into Hydrotalcite-Like Compound by Ion Exchanged Method

2016 ◽  
Vol 846 ◽  
pp. 440-447
Author(s):  
Sheikh Ahmad Izaddin Sheikh Mohd Ghazali ◽  
Siti Halimah Sarijo ◽  
Mohd Zobir Hussein
Keyword(s):  
Surface Area ◽  
Anion Exchange ◽  
Layered Double Hydroxide ◽  
Nitrogen Adsorption ◽  
Basal Spacing ◽  
Dichlorophenoxyacetic Acid ◽  
Exchange Method ◽  
Type Iv ◽  
Double Hydroxide ◽  
Adsorption Desorption

The intercalation of herbicide, 3,4-dicholorophenoxyacetic acid (3,4D), into zinc-aluminium-layered double hydroxide (LDH) for the formation of a new nanocomposite ZADX, was accomplished via anion exchange method. Due to the intercalation of 3,4D with LDH interlayer domain, basal spacing expanded from 8.9Å in the ZAL to 17.7-19.0 Å in the ZADX. The percentage loading of 3,4D in the ZADX is 51.4 % (w/w). The FTIR spectra of the nanocomposite shows resemblance peaks of the 3,4D and Zn-Al-layered double hydroxide indicating the inclusion of 3,4D into the layered double hydroxide. Surface area of the resulting nanocomposite increased from 1.3 to 7.14 m2g-1 with the nitrogen adsorption-desorption of type IV.

scholarly journals Synthesis of organo-mineral nanohybrid material: Phenoxyacetate anions in the lamella of Mg-Al-layered double hydroxide

2006 ◽  
Vol 12 (4) ◽  
pp. 225-230
Author(s):  
Botomei Anca ◽  
Emil Dumitriu ◽  
Hulea Vasile ◽  
Nastro Alfonso
Keyword(s):  
Layered Double Hydroxide ◽  
Self Assembly ◽  
Basal Spacing ◽  
Phenoxyacetic Acid ◽  
Absorption Bands ◽  
Characteristic Functional ◽  
Reconstruction Methods ◽  
Assembly Technique ◽  
Double Hydroxide ◽  
Nanohybrid Material

An organo-mineral nanohybrid material in which the organic moiety is interleaved inside the inorganic lamella was prepared by using phenoxyacetate anions as a guest in the Mg-Al-layered double hydroxide lamella (as an inorganic host) by the self-assembly technique, anion exchange and the reconstruction methods. The powder XRD patterns of the resulted materials show that the basal spacing of the Mg-AI-layered double hydroxide with carbonate as the counter anions expanded from 7.7 ? to around 16.6 ? in the nanohybrid materials. IR studies show that the absorption bands of the resulting materials correspond to the characteristic functional groups of the host and the guest structures. When the two results are taken together, the expansion can be attributed to the intercalation of the phenoxyacetic acid in the inorganic interlamella for the formation of the nanohybrid material. The intercalation of phenoxyacetate anions was also confirmed by thermogravimetric analysis (TG).

scholarly journals Synthesis and Characterization of Layered-Double Hydroxide 3-(4-Hydroxyphenyl) Propionate Nanocomposite

Nano Hybrids ◽  
2014 ◽  
Vol 7 ◽  
pp. 53-67 ◽  
Author(s):  
Ahmad Siti Nurasikin ◽  
Hashim Norhayati ◽  
Nur Hidayah Yusri ◽  
Illyas Md Isa ◽  
Azlan Kamari ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Layered Double Hydroxide ◽  
Ftir Spectra ◽  
Basal Spacing ◽  
Exchange Method ◽  
X Ray ◽  
Ion Exchange Method ◽  
Double Hydroxide ◽  
Thermal Stability Of

A new layered-double hydroxide-3-(4-hydroxyphenyl) propionate (LDH-HPP) has been synthesized by intercalation of 3-(4-hydroxyphenyl) propionic acid (HPP) into Zn-Al-layered double hydroxide (LDH) by ion-exchange method. PXRD, FTIR, TGA/DTG, compositional studies and FESEM were used to characterize the synthesized nanocomposite. The intercalation of HPP into the interlayer gallery space of LDH was characterized by x-ray diffractogram showed expanded basal spacing of the value of 17.1 Å. The FTIR spectra of LDH-HPP nanocomposite synthesis by 0.025M HPP resembled a mixture of both FTIR spectra of HPP and LDH. Thermal analysis of LDH-HPP nanocomposite shows a better thermal stability as compared to the pure HPP, which proved that the intercalation of HPP into LDH interlayer enhanced the thermal stability of the HPP.

IN SITU HIGH TEMPERATURE FT-IR STUDY OF THE INTERLAYER NAPHTHALENE-2,6-DISULFONATE IN Mg AND Al LAYERED DOUBLE HYDROXIDE

2011 ◽  
Vol 25 (31) ◽  
pp. 4185-4189
Author(s):  
EIJI KANEZAKI ◽  
MASAHIRO KATOH
Keyword(s):  
High Temperature ◽  
Layered Double Hydroxide ◽  
Basal Spacing ◽  
Vibration Band ◽  
Stretching Vibration ◽  
Ft Ir ◽  
Ir Study ◽  
Double Hydroxide ◽  
Heating Up

In high temperature in situ FT-IR (HTFTIR) spectra of Mg and Al layered double hydroxide with interlayer naphthalene-2,6-disulfonate ( Mg / Al / N 26 DS - LDH ), one S - O stretching vibration band of the non-coordinating - SO 3 group in the interlayer N 26 DS dianion is observed below 400 °C at 1035 cm-1 with keeping intensity. High temperature in situ X-ray diffraction (HTXRD) indicates that the basal spacing remains also constant up to 400 °C, MgSO 4 appears after the LDH collapses at 500 °C and some metal oxides are formed at higher temperature. Both results in HTXRD and HTFTIR indicate that the layered structure in this LDH is stable against heating up to 400 °C.

The Effect of Zinc to Aluminium Molar Ratio on the Physico-Chemical Properties of Zinc-Aluminium-3,4-Dichlorophenoxy Acetate Nanocomposite

2013 ◽  
Vol 756 ◽  
pp. 127-134
Author(s):  
Sheikh Ahmad Izaddin Sheikh Mohd Ghazali ◽  
Mohd Zobir Hussein ◽  
Siti Halimah Sarijo
Keyword(s):  
Layered Double Hydroxide ◽  
Mole Fraction ◽  
Self Assembly ◽  
Chemical Properties ◽  
Zinc Ion ◽  
Molar Ratio ◽  
Basal Spacing ◽  
Molar Ratios ◽  
Assembly Method ◽  
Double Hydroxide

Layered double hydroxide (LDH) hybrid materials of Zn-Al-layered double hydroxide-3,4-dichlorophenoxy acetate acidnanocomposites (ZADs) were prepared by direct self-assembly method. The pH of the solution was adjusted to 7.5 using 2M NaOH. Various Zn2+ to Al3+ molar ratios, R ranging from 1 to 6 were used with a fixed concentration of 3,4-D at 0.3 M. The Powder X-ray diffraction (PXRD) patterns showed the formation of well-ordered nanocomposite with the expansion of basal spacing from 8.9 Å in the Zinc-Aluminium-Layered Double Hydroxide (ZAL) to 18.7 - 22.1 Å in the resulting nanocomposites. The Fourier transform infrared (FTIR)spectra for the nanocomposites showed features for both ZAL and ZAD, showing the successful intercalation of the organic moiety into the LDH interlayer. The percentage loading of 3,4-dichlorophenoxy acetati acid(3,4-D) in LDH was found to be increased from 34.7-48.1 % (w/w), as the mole fraction of Al decreased from 0.44-0.15. This study shows that the mole fraction of zinc ion was replaced by aluminium ion in the LDH plays an important role in controlling the physic-chemical properties of the resulting material.

scholarly journals Intercalations and Characterization of Zinc/Aluminium Layered Double Hydroxide-Cinnamic Acid

2019 ◽  
Vol 14 (1) ◽  
pp. 165 ◽  
Author(s):  
Nurain Adam ◽  
Sheikh Ahmad Izaddin Sheikh Mohd Ghazali ◽  
Nur Nadia Dzulkifli ◽  
Cik Rohaida Che Hak ◽  
Siti Halimah Sarijo
Keyword(s):  
Layered Double Hydroxide ◽  
Cinnamic Acid ◽  
Close Contact ◽  
Direct Method ◽  
Basal Spacing ◽  
Stability Field ◽  
Definite Function ◽  
Nitrate Hexahydrate ◽  
Double Hydroxide

Cinnamic acid (CA) is known to lose its definite function by forming into radicals that able to penetrate into the skin and lead to health issues. Incorporating CA into zinc/aluminum-layered double hydroxides (Zn/Al-LDH) able to reduce photodegradation and eliminate close contact between skin and CA. Co-precipitation or direct method used by using zinc nitrate hexahydrate and aluminium nitrate nonahydrate as starting precursors with addition of various concentration of CA. The pH were kept constant at 7 ± 0.5. Fourier Transform Infrared-Attenuated Total Reflectance (FTIR-ATR) shows the presence of nanocomposites peak 3381 cm–1 for OH group, 1641 cm–1 for C=O group, 1543 cm–1 for C=C group and 1206 cm–1 for C–O group  and disappearance of  N–O peak at 1352 cm–1 indicates that cinnamic acid were intercalated in between the layered structures. Powder X-Ray Diffraction (PXRD) analysis for Zn/Al-LDH show the basal spacing of 9.0 Ǻ indicates the presence of nitrate and increases to 18.0 Ǻ in basal spacing in 0.4M Zn/Al-LDH-CA. CHNS analysis stated that 40 % of cinnamic acid were being found and intercalated in between the interlayer region of the Zn/Al-LDH with higher thermal stability. Field Emission Scanning Electron Microscope (FESEM) images of 0.4 M Zn/Al-LDH-CA shows that the nanocomposites are in more compact, flaky non porous, large agglomerates with smooth the surfaces of the intercalated compound. Controlled release was successful with 80 % release in phosphite anion and 70 % release carbonate anion. The cinnamic acid was successfully inserted between the interlayer regions of Zn/Al-LDH with slow release formulation. Copyright © 2019 BCREC Group. All rights reservedReceived: 1st October 2018; Revised: 8th December 2018; Accepted: 12nd December 2018; Available online: 25th January 2019; Published regularly: April 2019How to Cite: Adam, N., Ghazali, S.A.I.S.M., Dzulkifli, N.N., Hak, C.R.C., Sarijo, S.H. (2019). Intercalations and Characterization of Zinc/Aluminium Layered Double Hydroxide-Cinnamic Acid. Bulletin of Chemical Reaction Engineering & Catalysis, 14 (1): 165-172 (doi:10.9767/bcrec.14.1.3328.165-172)Permalink/DOI: https://doi.org/10.9767/bcrec.14.1.3328.165-172 

The Structure and Release Kinetics of Ca–Al Layered Double Hydroxide by Intercalating with Diclofenac Sodium

NANO ◽  
2020 ◽  
Vol 15 (03) ◽  
pp. 2050028
Author(s):  
Yingying Ma ◽  
Shuhua Zhang ◽  
Yu Wang ◽  
Zhenlin Jiang ◽  
Nengshuo Fu ◽  
...  
Keyword(s):  
Side Effects ◽  
Layered Double Hydroxide ◽  
Release Kinetics ◽  
Drug Carrier ◽  
Diclofenac Sodium ◽  
Basal Spacing ◽  
Release Kinetic ◽  
Edge Structure ◽  
X Ray ◽  
Double Hydroxide

Diclofenac sodium (DS) is an aryl acetic acid nonsteroidal anti-inflammatory drug which is widely used in various types of chronic bone and joint pains, but its terminal plasma half life is short, often accompanied with gastrointestinal side effects. We try to find an inexpensive and effective drug carrier to prolong the administration interval, maintain a stable blood concentration and reduce side effects. In our work, DS had been intercalated into a layered inorganic host, Ca–Al layered double hydroxide (LDH) by co-precipitation under a nitrogen atmosphere to control the release. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscope (TEM) were used to investigate the change of chemical structure and morphological structure when DS was inserted into the interlayer of LDH. X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge structure (XANES) were employed to characterize the electron binding energy of calcium and aluminum cations both on the surface and in the bulk of the samples. The results of absorption peaks, morphologies and the basal spacing increased from 8.6[Formula: see text]Å to 29.59[Formula: see text]Å gave the evidences for the intercalation of DS into the interlayer of CaAl-LDH. The results of XPS and XANES spectra revealed the complexation of –OH and [Formula: see text] with Ca[Formula: see text] and Al[Formula: see text] were both were affected by the loading of DS with CaAl-LDH, but no new chemical bonds were formed. Inductively coupled plasma optical emission spectroscopy (ICP-OES) analysis showed the dissolving process of Ca and Al ions from CaAl-LDH in the solution. In addition, the results of the drug release profile and release kinetic of intercalated LDHs showed that release behavior of DS from intercalated compounds was well controlled.

scholarly journals RELEASE BEHAVIOR OF DICHLORPROP FROM ZN/AL-LDH-DICHLORPROP NANOCOMPOSITE INTO CHLORIDE, CARBONATE AND PHOSPHATE SOLUTIONS

2019 ◽  
Vol 81 (2) ◽  
Author(s):  
Norhayati Hashim ◽  
Sharifah Norain Mohd Sharif ◽  
Zuhailimuna Muda ◽  
Illyas Md Isa ◽  
Suriani Abu Bakar ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sodium Chloride ◽  
Layered Double Hydroxide ◽  
Sodium Carbonate ◽  
Sodium Phosphate ◽  
Basal Spacing ◽  
Pxrd Pattern ◽  
Release Study ◽  
Double Hydroxide ◽  
Phosphate Solutions

A release study of dichlorprop phenoxyherbicides from the interlayer of a Zn/Al-layered double hydroxide-dichlorprop nanocomposite was performed with various concentrations of sodium chloride, sodium carbonate and sodium phosphate and a mixture of sodium chloride, sodium carbonate and sodium phosphate in aqueous solution. The release study of dichlorprop showed that release is dependent on the concentration of the aqueous solution. The accumulated release percentage of dichlorprop phenoxyherbicides into the solution was found to be higher in solutions containing carbonate, phosphate, and a mixture of carbonate or phosphate anions. Confirmation of the release process was confirmed by the PXRD pattern of the powder recovered from highly concentrated solutions of sodium chloride, sodium carbonate, and sodium phosphate with basal spacing of 7.8 Å, 7.6 Å and 7.4 Å, is due to chloride, carbonate, and phosphate intercalation, respectively. The kinetic study revealed that dichlorprop release into sodium carbonate and sodium phosphate solutions is governed by pseudo-second order kinetics, while release into sodium chloride solution is governed by parabolic diffusion. This study shows that a layered double hydroxide might be used as a host for the controlled release of the phenoxyherbicide dichlorprop.

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