A Novel Synthetic Route to Layered Double Hydroxides Using Hexamethylenetetramine

Eu 2 O 3 nanorods were synthesized and characterized. The crystallites of Eu 2 O(CO 3 ) 2 •H 2 O nanorods and Eu 2 O 3 nanorods were obtained by means of surfactant assistance, with aqueous butanol solution as the solvent and hexamethylene tetramine as the base. The characteristics of the nanorods were analyzed by transmission electron microscopy, high-resolution transmission electron microscopy, scanning electron microscopy and X-ray diffraction. The Eu 2 O 3 nanorod is about 80-300 nm in diameter and 1-5 µm in length. The formation mechanism of the 1D products was also proposed.

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“…When reactive temperature is above 130 ℃, hexamethylene tetramine is hydrolyzed. 12 Thus formaldehyde and ammonia are formed (Eq. 1 …”

Section: Resultsmentioning

confidence: 99%

Formation of Eu₂O₃ Nanorods through Solvothermal Routes by Surfactant Assistance

et al. 2008

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“…[3][4][5][6] Since carbonate (CO 3 2-) has an exceptionally high affinity for hydrotalcite-like clays, crystalline LDHs possessing carbonate ions in the interlayer gallery spaces (LDH-carbonate) are typically obtained but other anions are not readily incorporated. Recent developments in the intercalation chemistry of LDHs have focused on the preparation of crystalline LDHs containing exchangeable anions by means of decarbonation of LDH-carbonate with dilute HCl [10] or acetate buffer [11] systems. However, the strong (HSeO 3 -) ions.…”

Section: +mentioning

confidence: 99%

Ultrasound‐Induced Rapid Intercalation of Biselenite in Layered Double Hydroxides

Lee

Kim

et al. 2011

Eur J Inorg Chem

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The deintercalation of carbonate (CO32–) ions from MgAl‐layered double hydroxides (LDHs) (Mg/Al = 2) both in monolayer films and powdered samples under atmospheric conditions in ethanol was investigated. A selenous acid precursor was incorporated into the interlayer gallery. Treatment with 0.5 M selenous acid (H2SeO3) for 30 min with powdered LDHs or with 0.1 M H2SeO3 for 5 min with the thin film LDHs resulted in carbonate ions being exchanged with biselenite (HSeO3–) ions. Electron microscopy showed that the morphologies of the original LDH particles remained after the reaction, despite the ultrasound being continuously applied for up to 2 h. XRD, FTIR and Raman spectroscopic scattering results strongly suggested that cyclic dimers of biselenite ions were incorporated into the gallery spaces of the LDHs, vertically arranged to the horizontal axes of the MgAl‐LDH layers.

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“…This is supported by the results of the structural and charge density model reported previously [49] and from another work that utilized hexamethylenetetramine (HMTA) to produce highly crystallized LDHs. [50] …”

Section: Urea Hydrolysismentioning

confidence: 99%

Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review

Othman

Helwani

Martunus

et al. 2009

Applied Organom Chemis

195

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In this paper, widely accepted methods of hydrotalcite preparation such as co-precipitation, urea hydrolysis, hydrothermal, sol-gel, microwave irradiation, steam activation and solvothermal have been selected and reviewed. Our review indicates that the nature of the divalent cations, the synthesis method, the calcination temperature and the nature of the interlayer species are determinant factors in shaping the surface properties of the layered double hydoxides. The basic strength of the surface base site and structural changes produced in the mixed oxides can be adjusted conveniently by varying the Al content during the synthesis. The combination of sol-gel with microwave irradiation during the gelling and crystallization steps has also been found to increase the surface area of the hydrotalcite-like compound.

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A Novel Synthetic Route to Layered Double Hydroxides Using Hexamethylenetetramine

Cited by 150 publications

References 15 publications

Formation of Eu₂O₃ Nanorods through Solvothermal Routes by Surfactant Assistance

Formation of Eu₂O₃ Nanorods through Solvothermal Routes by Surfactant Assistance

Ultrasound‐Induced Rapid Intercalation of Biselenite in Layered Double Hydroxides

Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review

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A Novel Synthetic Route to Layered Double Hydroxides Using Hexamethylenetetramine

Cited by 150 publications

References 15 publications

Formation of Eu2O3 Nanorods through Solvothermal Routes by Surfactant Assistance

Formation of Eu2O3 Nanorods through Solvothermal Routes by Surfactant Assistance

Ultrasound‐Induced Rapid Intercalation of Biselenite in Layered Double Hydroxides

Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review

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Formation of Eu₂O₃ Nanorods through Solvothermal Routes by Surfactant Assistance

Formation of Eu₂O₃ Nanorods through Solvothermal Routes by Surfactant Assistance