Synthesis and Characterization of Methyl-Orange/Layered Double Hydroxide (LDH) Nanocomposite

2011 ◽  
Vol 55-57 ◽  
pp. 753-757 ◽  
Author(s):  
Jian Qiang Liu ◽  
Xing Qi Fu ◽  
Jian Ye Song ◽  
Yun Xu Fu ◽  
Wan Guo Hou
Keyword(s):  
Thermal Stability ◽  
Methyl Orange ◽  
Layered Double Hydroxide ◽  
Guest Molecule ◽  
High Thermal Stability ◽  
Reconstruction Method ◽  
Element Analysis ◽  
Ft Ir ◽  
Double Hydroxide

In this paper, the intercalation of methyl-orange (MO) into Mg/Al (ratio=2:1) layered double hydroxide (LDH) was carried out using reconstruction method to obtain MOLDH nanocomposite material. Its chemical composition, crystal structure, appearance and thermal stability were characterized by XRD, FT-IR, TEM, TG-DTA and element analysis. It has been found that the MOLDH still keeps the typical lamellar structure, and the guest MO has been intercalated into the layers of the host LDH. The MOLDH’s disassembly temperature is higher more than 30°C than that of guest molecule MO, so it can be used as a new dye with high thermal stability.

Synthesis and Characterization of Methyl-Red/Layered Double Hydroxide (LDH) Nanocomposite

2009 ◽  
Vol 79-82 ◽  
pp. 493-496 ◽  
Author(s):  
Jian Qiang Liu ◽  
Xing Cheng Zhang ◽  
Wan Guo Hou ◽  
You Yong Dai ◽  
Hongdi Xiao ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Lamellar Structure ◽  
Guest Molecule ◽  
High Thermal Stability ◽  
Reconstruction Method ◽  
Methyl Red ◽  
Element Analysis ◽  
Ft Ir ◽  
Double Hydroxide

In this paper, the intercalation of methyl-red (MR) into Mg/Al (ratio=2:1) layered double hydroxide (LDH) was carried out using reconstruction method to obtain MRLDH nanocomposite material. Its chemical composition, crystal structure and appearance were characterized by XRD, FT-IR, TEM, TG-DTA and element analysis. It has been found that the MRLDH still keeps the typical lamellar structure, and the guest MR has inserted into the layers of the host LDH. The MRLDH’s disassembly temperature is higher more than 70°C than that of guest molecule MR, so it can be used as a new dye with high thermal stability.

Preparation, Characterization of Supported Phosphotungstic Acid HPW-MCM-48 and Photocatalytic Degradation of Aqueous Methyl Orange

2013 ◽  
Vol 842 ◽  
pp. 147-150 ◽  
Author(s):  
Zhe Lin Liu ◽  
Li Guo Guan ◽  
Zong Rui Liu ◽  
Mei Chun Bao ◽  
Ling Xu
Keyword(s):  
Thermal Stability ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Phosphotungstic Acid ◽  
High Thermal Stability ◽  
Heteropoly Acids ◽  
Ft Ir ◽  
Adsorption Desorption

In this paper, heteropoly acids were supported onto mesopore materials MCM-48 with lager surface area and high thermal stability. The supported heteropoly acids catalysts were characterized by FT-IR, XRD, TEM and N2 adsorption-desorption thechniques. In addition, the effects of supported contents of heteropoly acids on degradation rate also had been researched.

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.

Preparation and Physicochemical Characterization of Magnetic Composite: CuFe2O4 / Layered Double Hydroxide

2014 ◽  
Vol 955-959 ◽  
pp. 47-50
Author(s):  
Dan Chen ◽  
Xiao Long Ma
Keyword(s):  
Layered Double Hydroxide ◽  
Spinel Ferrite ◽  
Sol Gel ◽  
Physicochemical Characterization ◽  
Magnetic Composite ◽  
X Ray Diffraction ◽  
Microwave Hydrothermal ◽  
Ft Ir ◽  
Double Hydroxide

We fabricated new magnetic material CuFe2O4/Zn2Cr-LDH by the combination of CuFe2O4 and layered double hydroxide (LDH) through two steps. CuFe2O4 was prepared by sol-gel method with the assistant of citric acid, which was used in synthesis of the composite via microwave hydrothermal method subsequently. The physicochemical properties of the composite was characterized by several techniques, such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, Vibrating sample magnetometer (VSM) and Thermogravimetry-differential thermal analysis (TG-DTA). The magnetic composite reveals several advantage of LDH structure and spinel ferrite oxide and is potential for the application of heterogeneous catalysis.

scholarly journals Intercalation Zn/Cr Layered Double Hydroxides with K3[𝛼-PW12O40]nH2O and K4[𝛼-SiW12O40]nH2O as Adsorbent of Rhodamine-B

2020 ◽  
Vol 4 (4) ◽  
pp. 109
Author(s):  
Jeri Ramadhan ◽  
Neza Rahayu Palapa ◽  
Tarmizi Taher ◽  
Risfidian Mohadi ◽  
Aldes Lesbani
Keyword(s):  
Free Energy ◽  
Layered Double Hydroxide ◽  
Rhodamine B ◽  
Adsorption Process ◽  
Isotherm Models ◽  
Ft Ir ◽  
Enthalpy And Entropy ◽  
Double Hydroxide ◽  
Double Hydroxides

Synthesis of Zn-Cr layered double hydroxide intercalated with polyoxometalate K3[𝛼-PW12O40]nH2O and K4[𝛼- SiW12O40]nH2O was conducted successfully. The characterization of layered double hydroxide intercalated was performed using XRD and FT-IR analyses. After that layered double hydroxide intercalated used as an adsorbent of rhodamine B (RhB) dye. The results show Rhodamine-B (RhB) more effective adsorbed using the Zn-Cr adsorbent K3[𝛼-PW12O40]nH2O than using an intercalated adsorbent K4[𝛼-SiW12O40]nH2O because the distance between the layers is smaller. Study of kinetics showed that the adsorption process is more fits with PSO than PFO based on coefficients correlation. The adsorption process described by Langmuir isotherm models for all adsorbent. The value of enthalpy and entropy shows that the adsorption process was endothermic and negative free energy value was indicated that the process was spontaneous.

Synthesis and Characterization of Layered Double Hydroxide-3-(4-Methoxyphenyl) Propionate Nanocomposite

Nano Hybrids ◽  
2014 ◽  
Vol 8 ◽  
pp. 39-56 ◽  
Author(s):  
Zuhailimuna Muda ◽  
Norhayati Hashim ◽  
Nur Hidayah Yusri ◽  
Illyas Md Isa ◽  
Azlan Kamari ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Layered Double Hydroxide ◽  
Synthesis And Characterization ◽  
Basal Spacing ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Double Hydroxide ◽  
Thermal Stability Of

Zn/Al layered double hydroxide (LDH) intercalated by an anionic phenoxyherbicide guest, 3-(4-methoxypheny) propionate (MPP) were prepared by ion-exchange method. Power XRD and FTIR shows that the MPP phenoxyherbicide were successfully intercalated into the LDH interlayer. The basal spacing for Zn/Al layered double hydroxide-3-(4-methoxyphenyl) propionate nanocomposite (LDH-MPP) was 18.7 Å - 20.5 Å for 0.015 M, 0.025 M, and 0.050 M of MPP, respectively. Thermal analysis shows that the thermal stability of MPP was improved by the intercalation into the LDH interlayer. The results were also supported by elemental analysis and the surface morphology of this nanocomposite.

scholarly journals Preparation And Characterization Of g-C3N4 @ L-Arginine As A Highly - Efficient And Recyclable Catalyst For The Synthesis of 1, 4-Dihydropyridine, 4H-Chromene, And 2, 3-Dihydro Quinazoline Derivatives

2021 ◽  
Author(s):  
Zeinab Tajik ◽  
Hossein Ghafuri ◽  
Nastaran Ghanbari ◽  
Payman Hanifehnejad
Keyword(s):  
Thermal Stability ◽  
Multicomponent Reactions ◽  
Media Use ◽  
High Thermal Stability ◽  
Recyclable Catalyst ◽  
High Yield ◽  
Ft Ir ◽  
Quinazoline Derivatives ◽  
Reaction Media

Abstract In this work, the nanocatalyst of g-C3N4@L-arginine was prepared that synthesis of it in comparison with the synthesis of other catalysts was convenient; initially, this prepared nanocatalyst was evaluated and verified by FT-IR, EDX, XRD, TGA, and FESEM analysis, and in the next step, the performance of nanocatalyst in the synthesis of 1, 4-dihydropyridine, 4H-chromene, and 2, 3-dihydro quinazoline derivatives were examined with high yield. Properties such as high thermal stability, easy separation of reaction media, use in various multicomponent reactions, and reusability have caused that this novel nanocatalyst was changed into a unique catalyst in its own age.

Physicochemical Characterization of the Magnetic Fe3O4/MO-Intercalated-Layered Double Hydroxide Composite

2013 ◽  
Vol 734-737 ◽  
pp. 2168-2171
Author(s):  
Dan Chen ◽  
Xiao Long Ma ◽  
Yang Li
Keyword(s):  
Layered Double Hydroxide ◽  
Physicochemical Characterization ◽  
Basal Spacing ◽  
X Ray Diffraction ◽  
Exchange Method ◽  
Microwave Hydrothermal ◽  
Ft Ir ◽  
Double Hydroxide ◽  
Ft Ir Spectroscopy

A new magnetic Fe3O4/MO-intercalated-LDH composite has been synthesized by combination of Fe3O4, layered double hydroxide (LDH) and methyl orange (MO). Fe3O4/Zn2CrLDH and Fe3O4/MO-intercalated-LDH were obtained via two-step microwave hydrothermal and anion exchange method. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and vibrating sample magnetometer (VSM) were conducted to characterize the as-prepared samples. The latter exhibited that basal spacing of Zn2Cr-LDH is 1.18 nm. The value of saturation magnetization (Ms) is 20.5 emu/g. In addition, the amounts of adsorbed MO reached 1.54 mmol/g. Therefore, the material shows several advantages for the removal of pollutants.

Synthesis and Characterization of Mg-Al Layered Double Hydroxide

2012 ◽  
Vol 454 ◽  
pp. 101-104 ◽  
Author(s):  
Wan Zhong Yin ◽  
Qi Tan ◽  
Lei Liu ◽  
Xiao Li Li
Keyword(s):  
Layered Double Hydroxide ◽  
Milling Time ◽  
Raw Materials ◽  
Weight Ratio ◽  
Hydroxyl Groups ◽  
Wet Milling ◽  
Ft Ir ◽  
Double Hydroxide ◽  
Partical Size

Mg-Al layered double hydroxide was synthesized by the method of mechanochemistry /crystallization at the dry milling time of 6 h, wet milling time of 2 h, milling speed of 250 r/min, and ball to powder weight ratio of 50 to 1 using brucite, Al(OH)3 and Na2CO3 as the raw materials. Characterizations of the materials were achieved by XRD, TEM, FT-IR and TG-DSC. The results showed that well crystallized Mg-Al LDH with average partical size of 40 nm were synthesized under this condition. Mg-Al LDH was formed with CO32- freely intercalated between the hydroxide host layers. The material generally decomposed via two distinct stages. The first stage at 229.5 °C was attributed to the loss of interlayer water, and the second stage at 407.8°C was due to the loss of hydroxyl groups from the brucite-like layer, as well as of the carbonate irons.

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