A novel method to delaminate nitrate-intercalated Mg–Al layered double hydroxides in water and application in heavy metals removal from waste water

Mir Tamzid Rahman; Tomohito Kameda; Shogo Kumagai; Toshiaki Yoshioka

doi:10.1016/j.chemosphere.2018.03.166

A novel method to delaminate nitrate-intercalated Mg–Al layered double hydroxides in water and application in heavy metals removal from waste water

Mir Tamzid Rahman, Tomohito Kameda, Shogo Kumagai, Toshiaki Yoshioka

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

Nitrate-intercalated Mg–Al layered double hydroxide (LDH) was successfully delaminated in water by a facile and effective method upon reflux at 120 °C for 24 h followed by sonication at 40 °C for 5 h. This process is environmentally friendly since water is the only solvent used. The delaminated nanosheets were characterized by microscopic, spectroscopic, and particle size analyses. The delamination process successfully produced octahedron-shaped single-layer nanosheets 50–150 nm in size. X-ray photoelectron spectroscopy (XPS) data confirmed that the surface elements and their chemical status are consistent with the basic layer of Mg–Al LDH. The delaminated nanosheets displayed higher adsorption capacity for removing heavy metals from waste water than the original powdered LDH. After treating the waste water, a sharp and intense peak in the X-ray powder diffraction (XRD) pattern of the precipitate confirms the restacking of the LDH nanosheets.

Original language	English
Pages (from-to)	281-290
Number of pages	10
Journal	Chemosphere
Volume	203
DOIs	https://doi.org/10.1016/j.chemosphere.2018.03.166
Publication status	Published - 2018 Jul

Keywords

Delamination
Heavy metals removal
Mg–Al LDH
Waste water

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Chemistry(all)
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.chemosphere.2018.03.166

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title = "A novel method to delaminate nitrate-intercalated Mg–Al layered double hydroxides in water and application in heavy metals removal from waste water",

abstract = "Nitrate-intercalated Mg–Al layered double hydroxide (LDH) was successfully delaminated in water by a facile and effective method upon reflux at 120 °C for 24 h followed by sonication at 40 °C for 5 h. This process is environmentally friendly since water is the only solvent used. The delaminated nanosheets were characterized by microscopic, spectroscopic, and particle size analyses. The delamination process successfully produced octahedron-shaped single-layer nanosheets 50–150 nm in size. X-ray photoelectron spectroscopy (XPS) data confirmed that the surface elements and their chemical status are consistent with the basic layer of Mg–Al LDH. The delaminated nanosheets displayed higher adsorption capacity for removing heavy metals from waste water than the original powdered LDH. After treating the waste water, a sharp and intense peak in the X-ray powder diffraction (XRD) pattern of the precipitate confirms the restacking of the LDH nanosheets.",

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author = "Rahman, {Mir Tamzid} and Tomohito Kameda and Shogo Kumagai and Toshiaki Yoshioka",

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AU - Rahman, Mir Tamzid

AU - Kameda, Tomohito

AU - Kumagai, Shogo

AU - Yoshioka, Toshiaki

PY - 2018/7

Y1 - 2018/7

N2 - Nitrate-intercalated Mg–Al layered double hydroxide (LDH) was successfully delaminated in water by a facile and effective method upon reflux at 120 °C for 24 h followed by sonication at 40 °C for 5 h. This process is environmentally friendly since water is the only solvent used. The delaminated nanosheets were characterized by microscopic, spectroscopic, and particle size analyses. The delamination process successfully produced octahedron-shaped single-layer nanosheets 50–150 nm in size. X-ray photoelectron spectroscopy (XPS) data confirmed that the surface elements and their chemical status are consistent with the basic layer of Mg–Al LDH. The delaminated nanosheets displayed higher adsorption capacity for removing heavy metals from waste water than the original powdered LDH. After treating the waste water, a sharp and intense peak in the X-ray powder diffraction (XRD) pattern of the precipitate confirms the restacking of the LDH nanosheets.

AB - Nitrate-intercalated Mg–Al layered double hydroxide (LDH) was successfully delaminated in water by a facile and effective method upon reflux at 120 °C for 24 h followed by sonication at 40 °C for 5 h. This process is environmentally friendly since water is the only solvent used. The delaminated nanosheets were characterized by microscopic, spectroscopic, and particle size analyses. The delamination process successfully produced octahedron-shaped single-layer nanosheets 50–150 nm in size. X-ray photoelectron spectroscopy (XPS) data confirmed that the surface elements and their chemical status are consistent with the basic layer of Mg–Al LDH. The delaminated nanosheets displayed higher adsorption capacity for removing heavy metals from waste water than the original powdered LDH. After treating the waste water, a sharp and intense peak in the X-ray powder diffraction (XRD) pattern of the precipitate confirms the restacking of the LDH nanosheets.

KW - Delamination

KW - Heavy metals removal

KW - Mg–Al LDH

KW - Waste water

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A novel method to delaminate nitrate-intercalated Mg–Al layered double hydroxides in water and application in heavy metals removal from waste water

Abstract

Keywords

ASJC Scopus subject areas

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