Hierarchically porous MgAl mixed metal oxide synthesized by sudden decomposition of MgAl layered double hydroxide gel

Microwave-absorbing materials have attracted increased research interest in recent years because of their core roles in the fields of electromagnetic (EM) pollution precaution and information security. In this paper, microwave-absorbing material NiFe-layered double hydroxide (NiFe-LDH) was synthesized by a simple co-precipitation method and calcined for the fabrication of NiFe-mixed metal oxide (NiFe-MMO). The phase structure and micromorphology of the NiFe-LDH and NiFe-MMO were analyzed, and their microwave-absorbing properties were investigated with a vector network analyzer in 2–18 GHz. Both NiFe-LDH and NiFe-MMO possessed abundant interfaces and a low dielectric constant, which were beneficial to electromagnetic wave absorption, owing to the synergistic effect of multi-relaxation and impedance matching. The optimum reflection loss (RL) of NiFe-LDH and NiFe-MMO was −58.8 dB and −64.4 dB, respectively, with the thickness of 4.0 mm in the C band. This work demonstrates that LDH-based materials have a potential application in electromagnetic wave absorption.

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Enhanced visible-light-driven photocatalytic removal of refractory pollutants by Zn/Fe mixed metal oxide derived from layered double hydroxide

Catalysis Communications ◽

10.1016/j.catcom.2017.05.010 ◽

2017 ◽

Vol 99 ◽

pp. 15-19 ◽

Cited By ~ 24

Author(s):

Qi Yang ◽

Shana Wang ◽

Fei Chen ◽

Kun Luo ◽

Jian Sun ◽

...

Keyword(s):

Metal Oxide ◽

Visible Light ◽

Layered Double Hydroxide ◽

Mixed Metal Oxide ◽

Mixed Metal ◽

Photocatalytic Removal ◽

Visible Light Driven ◽

Double Hydroxide

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Synthesis of high-specific-surface-area Li-Al mixed metal oxide: Through nanoseed-assisted growth of layered double hydroxide

Applied Clay Science ◽

10.1016/j.clay.2021.106006 ◽

2021 ◽

Vol 203 ◽

pp. 106006

Author(s):

Masanori Takemoto ◽

Yasuaki Tokudome ◽

Hidenobu Murata ◽

Kenji Okada ◽

Masahide Takahashi ◽

...

Keyword(s):

Metal Oxide ◽

Specific Surface ◽

Surface Area ◽

Layered Double Hydroxide ◽

Specific Surface Area ◽

High Specific Surface Area ◽

Mixed Metal Oxide ◽

Mixed Metal ◽

Double Hydroxide

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Photocatalytic Cr(VI) reduction by mixed metal oxide derived from ZnAl layered double hydroxide

Applied Clay Science ◽

10.1016/j.clay.2017.03.034 ◽

2017 ◽

Vol 143 ◽

pp. 168-174 ◽

Cited By ~ 28

Author(s):

Xiaoya Yuan ◽

Qiuye Jing ◽

Jingtao Chen ◽

Li Li

Keyword(s):

Metal Oxide ◽

Layered Double Hydroxide ◽

Mixed Metal Oxide ◽

Mixed Metal ◽

Double Hydroxide

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Development of Mesopore Structure of Mixed Metal Oxide through Albumin-Templated Coprecipitation and Reconstruction of Layered Double Hydroxide

Nanomaterials ◽

10.3390/nano11030620 ◽

2021 ◽

Vol 11 (3) ◽

pp. 620

Author(s):

Sang-Yong Jung ◽

Bo-Kyung Kim ◽

Hyoung-Jun Kim ◽

Jae-Min Oh

Keyword(s):

Crystal Growth ◽

Metal Oxide ◽

Layered Double Hydroxide ◽

Homogeneous Distribution ◽

Mixed Metal Oxide ◽

Electron Microscopic ◽

Lateral Direction ◽

Mixed Metal ◽

Diffraction Patterns ◽

Double Hydroxide

Mixed metal oxide (MMO) with relatively homogeneous mesopores was successfully obtained by calcination and reconstruction of albumin-templated layered double hydroxide (LDH). The aggregation degree of albumin-template was controlled by adjusting two different synthesis routes, coprecipitation and reconstruction. X-ray diffraction patterns and scanning electron microscopic images indicated that crystal growth of LDH was fairly limited during albumin-templated coprecipitation due to the aggregation. On the hand, crystal growth along the lateral direction was facilitated in albumin-templated reconstruction due to the homogeneous distribution of proteins moiety. Different state of albumin during LDH synthesis influenced the local disorder and porous structure of calcination product, MMO. The N2 adsorption-desorption isotherms demonstrated that calcination on reconstructed LDH produced MMO with large specific surface area and narrow distribution of mesopores compared with calcination of coprecipitated LDH.

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