Preparation of Layered Double Hydroxides toward Precisely Designed Hierarchical Organization

Wijitwongwan, Rattanawadee Ploy; Intasa-Ard, Soontaree Grace; Ogawa, Makoto

doi:10.3390/chemengineering3030068

Cited by 49 publications

(34 citation statements)

References 148 publications

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“…The concentration of CR was analyzed using UV-Visible spectrophotometer Bio-Base BK-UV1800 at wavelength 516 nm. (Wijitwongwan et al, 2019) Nickel nitrate (17.827 g, 0.01 L) and aluminum nitrate (9.378 g, 0.01 L) with ratio molar Ni/Al (3:1) were mixed then 10 mL of 2 M sodium hydroxide was added to the mixture. The pH of reaction was adjusted to pH 10 by addition of sodium hydroxide.…”

Section: Chemicals and Instrumentationmentioning

confidence: 99%

“…Application of LDHs in such areas as catalysts, catalyst' supports, electrode, pharmaceutics, and adsorbents. In order to optimize materials' performances, eforts have been made to vary the composition as well as the particle morphology of the LDHs (Wijitwongwan et al, 2019). LDH could be synthesized with diverse methods as instance hydrothermal, hydrolysis, sonochemical solgel and co-precipitation (Bernardo and Ribeiro, 2019;Stawiński et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Structural Stability of Ni/Al Layered Double Hydroxide Supported on Graphite and Biochar Toward Adorption of Congo Red

Siregar

Palapa

Wijaya

et al. 2021

sci. technol. indones.

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In this research, Ni/Al layered double hydroxide (LDH) was modified by using co-precipitation method to generate Ni/Al-graphite (Ni/Al-GF) and Ni/Al-biochar (Ni/Al-BC). The adsorbents were applied to remove Congo Red from aqueous solution. The obtained samples were characterized by using XRD, FTIR, BET and TG-DTA. The XRD diffraction pattern of Ni/Al LDH, Ni/Al-GF, and Ni/Al-BC presented the formation of composite with decreasing crystallinity. The surface area modified LDHs was higher than the pristine materials, which was obtained 15.106 m2/g, 21.595 m2/g and 438.942 m2/g for Ni/Al-LDH, Ni/Al-GF, Ni/Al-BC respectively. The adsorption of Congo Red on the materials was tested at diferent parameters and the results exhibited that Congo Red adsorption on LDHs were pseudo-first-order (PFO) kinetic, spontaneous, endothermic and followed Langmuir model. The adsorbents removed Congo Red by high performance stability with adsorption capacity was 116.297 mg/g for Ni/Al-GF and 312.500 mg/g for Ni/Al-BC. These adsorption capacity was higher than the pristine LDH (61.728 mg/g). The regeneration process which carried out for five cycles showed that Ni/Al-GF and Ni/Al-BC have stable structures as reuse adsorbents for Congo Red from aqueous solution.

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Section: Chemicals and Instrumentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Stability of Ni/Al Layered Double Hydroxide Supported on Graphite and Biochar Toward Adorption of Congo Red

Siregar

Palapa

Wijaya

et al. 2021

sci. technol. indones.

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“…This may be attributed to the dissolution of Mg(OH) 2 at the edge in early stage and thermodynamic stabilization through metal ratio balancing [ 43 ]. Under hydrothermal condition, the outermost low crystalline Ga(OH) 3 could diffuse into the main framework of LDH by replacing Al 3+ as often found in solid-solution process [ 44 , 45 ], resulting in the stabilization of M(II):M(III) ratio. From these quantitative analyses, we could find that hydrothermal treatment enabled incorporation of Ga 3+ into LDH within 0.5 h and the homogeneous distribution followed along with lattice rearrangement occurred during 24 h.…”

Section: Resultsmentioning

confidence: 99%

Homogeneous Incorporation of Gallium into Layered Double Hydroxide Lattice for Potential Radiodiagnostics: Proof-of-Concept

Jeung

Kim

2020

Nanomaterials

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Trivalent gallium ion was successfully incorporated into chemically well-defined MgAl-layered double hydroxide (LDH) frameworks through postsynthetic hydrothermal treatment. Quantitative analysis with inductively coupled plasma-mass spectroscopy exhibited that Ga3+ was first incorporated into LDH through partial dissolution-precipitation at the edge of LDH particle and homogeneously distributed throughout the particle by substitution of Ga3+ for Al3+ in LDH frame works. The powder X-ray diffraction patterns showed that the Ga3+ incorporation did not affect the crystal structure without evolution of unexpected impurities. The morphology and surface property of LDH evaluated by scanning electron microscopy and light scattering showed the preservation of physicochemical properties throughout 24 h of hydrothermal reaction. The distribution of incorporated Ga3+ was visualized with energy dispersive spectroscopy-assisted transmission electron microscopy, suggesting the homogeneous location of Ga3+ in an LDH particle. The X-ray absorption near-edge structure and extended X-ray absorption fine structure suggested that the Ga moiety was immobilized in LDH from 0.5 h and readily crystallized upon reaction time.

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“…The overall composition is expressed as the following general formula of [M 2+ 1−x M 3+ x (OH) 2 ] x+ (A n− ) x/n ∙yH 2 O. Owing to the versatile compositional variation of LDHs by the selection of metal ions in the hydroxide sheets and the interlayer anions, as well as their quantity (x values in [M 2+ 1−x M 3+ x (OH) 2 ] x+ (A n− ) x/n ), possible applications of LDHs have been reported such as polymer additives [ 1 ], drug/gene carriers [ 2 , 3 ], catalysts and catalysts’ supports [ 4 , 5 ] and anion exchangers/adsorbents [ 6 , 7 , 8 ]. Various synthetic methods have been examined and developed to prepare LDHs with desired composition and morphology [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of MgGa Layered Double Hydroxides and Possible Compositional Variation

2021

Self Cite

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Layered double hydroxides (LDHs), shown as the general formula of [M2+1−xM3+x(OH)2]x+(An−)x/n∙yH2O, are useful for various applications such as anion exchangers/adsorbents, catalysts and catalysts’ supports, and drug/gene carriers due to their structural, compositional and morphological characteristics and their variation. The x value (M3+/(M2+ + M3+) ratio) in layered double hydroxides (LDHs), corresponding to the layer charge density, is one of the important parameters for controlling the properties of LDHs. The x values in commonly available LDHs are limited (0.2 < x < 0.3). In order to obtain LDHs with x < 0.2, Mg2+ Ga3+–LDHs with interlayer iodide were examined. The linear correlation between lattice parameter a and x value in the products with x of 0.06–0.24 was seen, suggesting the successful substitution of Mg2+ in the brucite-like sheet with Ga3+. Carbonate and dodecyl sulfate types MgGa–LDH were prepared by ion exchange with carbonate anion and reconstruction in aqueous solution of sodium dodecyl sulfate. The products with x of 0.06 were dispersed in water and hexanol better than those with x of 0.24 for MgGa–LDHs containing carbonate and dodecyl sulfate, respectively, suggesting effects of the lower layer charge density on the dispersion.

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Preparation of Layered Double Hydroxides toward Precisely Designed Hierarchical Organization

Cited by 49 publications

References 148 publications

Structural Stability of Ni/Al Layered Double Hydroxide Supported on Graphite and Biochar Toward Adorption of Congo Red

Structural Stability of Ni/Al Layered Double Hydroxide Supported on Graphite and Biochar Toward Adorption of Congo Red

Homogeneous Incorporation of Gallium into Layered Double Hydroxide Lattice for Potential Radiodiagnostics: Proof-of-Concept

Preparation of MgGa Layered Double Hydroxides and Possible Compositional Variation

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