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“…Great efforts have been devoted to improve the adsorption properties for cations and neutral organic molecules. Surface modifications to add negatively charged functional groups or chelating agents were carried out to provide the adsorption capacity of metal cations for LDHs 126. By intercalating large organic anions, such as surfactants, into the interlayer of LDHs, the LDH surface properties of LDHs were changed from hydrophilic to hydrophobic, resulting in the enhanced adsorption capacity of LDHs for a diverse range of organic pollutants and even non‐ionic organic materials 127.…”

Section: Application Of Ldh(ldo)/carbon Nanocompositesmentioning

confidence: 99%

Hierarchical Nanocomposites Derived from Nanocarbons and Layered Double Hydroxides ‐ Properties, Synthesis, and Applications

Zhao

Zhang

Huang

et al. 2012

Adv Funct Materials

559

311

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A good arrangement and construction of different low-dimensional nanomaterials (e.g., zero-dimensional (0D) nanoparticles (NPs), one-dimensional (1D) nanotubes, nanowires, nanorods, and two-dimensional (2D) flakes) as building blocks with two or more levels from the nanometer to the macroscopic scale leads to the formation of three-dimensional (3D) hierarchical nanocomposites. Hierarchical composites are widely observed in nature, e.g., in plant cell walls, bone, animal shells, and skeletons, showing that a high mechanical performance can be obtained by structuring matter across a range of length scales. The combination of low-dimensional nanomaterials with distinct physical and chemical properties into a composite with hierarchical structures can usually inherit full advantages of the component materials, or even lead to the formation of multifunctional materials with unexpected properties for unique applications. For instance, the combined clay/polymer, [1] carbon nanotube (CNT)/polymer, [2,3] or graphene/ polymer [4] nanocomposites show significantly improved mechanical, electrical, and energy-absorbing properties. Clay/ CNT nanocomposites obtained by growing CNTs on clays were demonstrated to be much more excellent nanofillers for polymer reinforcement [5] and were with better oil adsorption properties [6,7] compared with either clay or CNTs separately. They can even serve as an advanced material for shock-absorbing applications. [8] Tailored assembly of 1D CNTs and 2D graphene into 3D architectures can further explore the utilization and improve the performance of graphitic carbon materials in nanoelectronics, sensors, and energy storage/conversion devices. [9,10] Exploring hierarchical composites with multifunctional properties through combining various building blocks together into a well-designed structure has always been a hot topic for material science. Among various building blocks, nanocarbons and layered double hydroxides (LDHs) were intensly investigated recently. On one hand, nanocarbon materials including fullerene, CNTs, and graphene, have been of great interest in the physics, chemistry, and materials communities since the first discovery of fullerene in 1985. Recently, the rapid progress of graphene and graphene-based materials has again triggered tremendous interest in 2D nanomaterials. On the other hand, LDHs are amongst the most studied advanced functional materials Hierarchical Nanocomposites Derived from Nanocarbons and Layered Double Hydroxides -Properties, Synthesis, and ApplicationsThe combination of one-dimensional and two-dimensional building blocks leads to the formation of hierarchical composites that can take full advantages of each kind of material, which is an effective way for the preparation of multifunctional materials with extraordinary properties. Among various building blocks, nanocarbons (e.g., carbon nanotubes and graphene) and layered double hydroxides (LDHs) are two of the most powerful materials that have been widely used in human life. This Feature Article present...

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“…2 However, the adsorbents studied are usually negatively charged materials such as kaolinite and montmorillonite, there are few studies on positively charged adsorbents, such as layered double hydroxides (LDHs in short), for the removal of heavy metal cations. [3][4][5][6] Layered double hydroxides, also known as hydrotalcite-like compounds (HTlc in short) or anionic clays, are a large group of natural and synthetic layered materials and have received considerable attention in recent years due to their special structures and unique applications. 7,8 LDHs can be represented by the empirical formula …”

Section: Introductionmentioning

confidence: 99%

Sorption of Pb(II) on Mg‐Fe Layered Double Hydroxide

Liang¹,

Hou²,

Xu³

2009

Chin. J. Chem.

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Mg-Fe layered double hydroxide (LDH) with a Mg/Fe molar ratio of 3∶1 was synthesized by using a coprecipitation method and the sorption removal of Pb(II) by the LDH sample from Pb(NO 3 ) 2 solution was investigated. It was found that Mg-Fe LDH showed a good sorption ability for Pb(II) from Pb(NO 3 ) 2 solution, indicating that the use of LDH as a promising inorganic sorbent for the removal of heavy metal ions is possible. The sorption kinetics and the sorption isotherm of Pb(II) on the LDH sample obeyed the pseudo-second order kinetic model and Aranovich-Donohue equation, respectively. The sorption mechanism of Pb(II) on the LDH may be attributed to the surface-induced precipitation and the chemical binding adsorption, and the removal ability arising from the surface-induced precipitation is much higher than that from the chemical binding adsorption.

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Cited by 75 publications

References 26 publications

Iron-modified hydrotalcite-like materials as highly efficient phosphate sorbents

Iron-modified hydrotalcite-like materials as highly efficient phosphate sorbents

Hierarchical Nanocomposites Derived from Nanocarbons and Layered Double Hydroxides ‐ Properties, Synthesis, and Applications

Sorption of Pb(II) on Mg‐Fe Layered Double Hydroxide

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