Fabrication of hierarchically porous monolithic layered double hydroxide composites with tunable microcages for effective oxyanion adsorption

Tarutani, Naoki; Tokudome, Yasuaki; Fukui, Megu; Nakanishi, Koji; Takahashi, Masahide

doi:10.1039/c5ra05942a

Cited by 31 publications

(16 citation statements)

References 15 publications

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“…To date, there are various reports on the synthesis of porous LDH in the presence of xAlx(OH)2Clx (M 2+ : Mg 2+ , Mn 2+ , Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ ) with hierarchically porous structures [70].…”

Section: Soft Templatingmentioning

confidence: 99%

“…Whereas the introduction of mesopores, increases loading capacity at an equilibrium state [145]. There has been various reports on the application of porous LDH towards environmental purposes, targeting at harmful anionic species in waste water, such as phosphates [17], various oxyanions (SO4 2− , CrO4 2− , MoO4 2− , HVO4 2− ) [70], and fluoride ion [14,91], thiosulfate [94], arsenic [89], and chromium(VI) oxyanion [97]. Porous LDH have been also used for the extraction of phenolic compounds [135], and oil separation from oil-polluted water [104].…”

Section: Field Of Applications Of Porous Ldhmentioning

confidence: 99%

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3D hierarchical and porous layered double hydroxide structures: an overview of synthesis methods and applications

Prevot

Tokudome

2017

J Mater Sci

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International audienceNanostructured layered double hydroxide (LDH) materials with unique diffusion properties, large surface area along with desired functionalities have recently been produced for a number of well-established and advanced fields of applications. In this review, we describe and discuss the main synthetic methods that have been reported for the fabrication of porous LDH with tailored chemical composition and porosity. The efficiency of soft and hard templating approaches is particularly reviewed. A special emphasis is put on the microstructure and porosity of the materials according to the synthetic method involved. Finally, the performance enhancement of the materials due to the presence of porosity, especially macroporosity, in applications such as pollutant removal, catalysis and energy storage and conversion is overviewed

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Section: Soft Templatingmentioning

confidence: 99%

Section: Field Of Applications Of Porous Ldhmentioning

confidence: 99%

3D hierarchical and porous layered double hydroxide structures: an overview of synthesis methods and applications

Prevot

Tokudome

2017

J Mater Sci

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“…We also reported the capability of water purification with hierarchically porous LDHs with tunable chemical compositions, 37) where monolithic adsorbents with a high and tunable adsorption capacity was demonstrated. Also, an enhancement of Tokudome: Aqueous synthesis of metal hydroxides with controllable nano/macro architectures JCS-Japan pseudocapacitance compared to a nonporous counterpart was demonstrated for mesoporous ¡-Ni(OH) 2 .…”

Section: Applications Of Metal Hydroxides With Controllable Nano/macrmentioning

confidence: 99%

Aqueous synthesis of metal hydroxides with controllable nano/macro architectures

Tokudome

2017

J. Ceram. Soc. Japan

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This review briefly describes recent advances on the synthesis of metal hydroxide nanomaterials and their assembly into 3D architectures toward applications of catalysis, adsorption, and energy conversion. The discussion is mainly dedicated to the synthesis strategies toward nanohydroxide-based functional materials. A special attention is focused on two reaction schemes for the preparations of: (1) macroporous (hydr)oxides monoliths and (2) monodispersed hydroxide nanoclusters and mesoporous hydroxides.

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“…Removal of molecules which comprise Cr(VI) anions is of particular importance since these compounds are widely-spread industrial pollutants and, at the same time, are very harmful for living organisms [6, 7]. The properties of CNTs as adsorbent materials of Cr(VI) compounds were intensively studied within the last decade [4, 6, 8–12].…”

Section: Introductionmentioning

confidence: 99%

Ab Initio Computational Study of Chromate Molecular Anion Adsorption on the Surfaces of Pristine and B- or N-Doped Carbon Nanotubes and Graphene

et al. 2017

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Density functional theory (DFT) computations of the electronic structures of undoped, B- and N-doped CNT(3,3), CNT(5,5) carbon nanotubes, and graphene with adsorbed chromate anions CrO4 2− were performed within molecular cluster approach. Relaxed geometries, binding energies, charge differences of the adsorbed CrO4 2− anions, and electronic wave function contour plots were calculated using B3LYP hybrid exchange-correlation functional. Oscillator strengths of electronic transitions of CrO4 2− anions adsorbed on the surfaces of studied carbon nanostructures were calculated by the TD-DFT method. Calculations reveal covalent bonding between the anion and the adsorbents in all studied adsorption configurations. For all studied types of adsorbent structures, doping with N strengthens chemical bonding with CrO4 2− anions, providing a ~2-eV increase in binding energies comparatively to adsorption of the anion on undoped adsorbents. Additional electronic transitions of CrO4 2− anions appear in the orange-green spectral region when the anions are adsorbed on the N-doped low-diameter carbon nanotubes CNT(3,3) and CNT(5,5).

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Fabrication of hierarchically porous monolithic layered double hydroxide composites with tunable microcages for effective oxyanion adsorption

Abstract: Hierarchical porous monolithic layered double hydroxide composites with size adjusted microcages for efficient CrO42− oxyanion adsorption.

Cited by 31 publications

References 15 publications

3D hierarchical and porous layered double hydroxide structures: an overview of synthesis methods and applications

3D hierarchical and porous layered double hydroxide structures: an overview of synthesis methods and applications

Aqueous synthesis of metal hydroxides with controllable nano/macro architectures

Ab Initio Computational Study of Chromate Molecular Anion Adsorption on the Surfaces of Pristine and B- or N-Doped Carbon Nanotubes and Graphene

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