Performance of layered double hydroxides intercalated with acetate as biodenitrification carbon source: The effects of metal ions and particle size

The quasi-paralleled and interlaced nanosheet arrays of NiMn layered double hydroxides are successfully grown on KCu7S4 microwires with quasi-one-dimensional channel by tuning the concentration of the metal ions.

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Effect of Layered Double Hydroxides with Different Particle Size on Properties of Bitumen

Materials Science Forum ◽

10.4028/www.scientific.net/msf.913.1062 ◽

2018 ◽

Vol 913 ◽

pp. 1062-1069

Author(s):

Min Wu ◽

Lian Li ◽

Bian Yang He ◽

Jian Ying Yu

Keyword(s):

Particle Size ◽

Physical Properties ◽

Rheological Properties ◽

Layered Double Hydroxides ◽

Particle Size Analysis ◽

Size Analysis ◽

Uv Aging ◽

Aging Resistance ◽

Microscopic Morphology ◽

Double Hydroxides

The crystal structure, microscopic morphology, particle size distribution and UV shielding properties of layered double hydroxides (LDHs) with different particle size were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser particle size analysis and ultraviolet and visible (UV-vis) spectrophotometer. The effects of LDHs with different particle size on the physical, rheological properties and UV aging resistance of bitumen were investigated by conventional physical properties and dynamic rheological characteristics. The results indicated that the particle size of LDHs had a little effect on the physical properties, and it had some influence on rheological properties of bitumen, but its influence on the UV aging resistance of bitumen was different significantly. When UV aging time was 9d, the viscosity aging indexes of bitumen modified by LDHs with different particle size (80nm, 115nm and 180nm) decreased by 48.2%, 58.1% and 63.8% compared with the pristine bitumen, respectively. LDHs with the particle size of 180 nm showed better improvement than other two kinds of LDHs on UV aging resistance of bitumen.

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Insight of synergistic effect of different active metal ions in layered double hydroxides on their electrochemical behaviors

Electrochimica Acta ◽

10.1016/j.electacta.2017.09.075 ◽

2017 ◽

Vol 253 ◽

pp. 302-310 ◽

Cited By ~ 33

Author(s):

Xuejin Li ◽

Meiyi Xin ◽

Sheng Guo ◽

Tonghui Cai ◽

Dongfeng Du ◽

...

Keyword(s):

Synergistic Effect ◽

Metal Ions ◽

Layered Double Hydroxides ◽

Electrochemical Behaviors ◽

Active Metal ◽

Double Hydroxides

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Microwaves and layered double hydroxides: A smooth understanding

Pure and Applied Chemistry ◽

10.1351/pac-con-08-07-01 ◽

2009 ◽

Vol 81 (8) ◽

pp. 1459-1471 ◽

Cited By ~ 27

Author(s):

Patricia Benito ◽

Francisco M. Labajos ◽

Vicente Rives

Keyword(s):

Particle Size ◽

Thermal Properties ◽

Particle Size Distribution ◽

Hydrothermal Treatment ◽

Layered Double Hydroxides ◽

Urea Hydrolysis ◽

Microwave Hydrothermal ◽

Noticeable Reduction ◽

Time Required ◽

Double Hydroxides

Microwave-hydrothermal treatment (MWHT), a modification of conventional hydrothermal treatment, has been used during post-treatment of different layered double hydroxides (LDHs). In some cases, microwaves (MWs) have been used simultaneously with urea hydrolysis or for reconstruction of the LDH structure. The main advantages of replacing the conventional furnaces by MW ovens are a noticeable reduction in the time required to complete the process to obtain well-crystallized materials, and modification of their particle size distribution and textural and thermal properties. MW radiation leads to an increase in the rate of urea hydrolysis and consequently to fast precipitation of LDHs. Finally, the memory effect of Ni,Al-based LDHs is also improved.

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Preparation and Characterization of Nanocrystalline Ce-Containing Layered Double Hydroxides

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.375 ◽

2011 ◽

Vol 239-242 ◽

pp. 375-379 ◽

Cited By ~ 1

Author(s):

Chun Xia Chen ◽

Yu Zhang ◽

Han Qing Zhao ◽

Jin Song Peng ◽

Bin Li

Keyword(s):

Particle Size ◽

Reaction Temperature ◽

Layered Double Hydroxides ◽

Crystallization Time ◽

Molar Ratios ◽

Microwave Assisted ◽

Crystallization Method ◽

Double Hydroxides ◽

Better Than

Ce-containing Layered Double Hydroxides (Ce-LDHs) were prepared by conventional and microwave-assisted crystallization method, which were denoted as Ce-LDHs-A and Ce-LDHs-B, respectively. The dispersibility of Ce-LDHs-B is much better than that of Ce-LDHs-A; the particles of Ce-LDHs-B with particle size ranging from 20 to 70 nm are smaller than that of Ce-LDHs-A with sizes around 50-300 nm. The effect of the cerium to aluminum molar ratios, microwave crystallization time and reaction temperature on the structure of Ce-LDHs was also investigated. The results show the excessive Ce into LDHs causes distortion of the samdwich, the damage of the LDHs structure becomes more and more serious with increasing the proportion of Ce/Al. The structure of Ce-LDHs becomes more and more perfect with the increasing of the microwave crystallization time and reaction temperature.

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Continuous Synthesis of Doped Layered Double Hydroxides in a Meso-Scale Flow Reactor

10.26434/chemrxiv.7017482 ◽

2018 ◽

Author(s):

Polina Yaseneva ◽

Nan An ◽

Matt Finn ◽

Nicholas Tidemann ◽

Nicholas Jose ◽

...

Keyword(s):

Particle Size ◽

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Layered Double Hydroxides ◽

Flow Reactor ◽

Synthesis Method ◽

Material Stability ◽

Double Hydroxides ◽

Meso Scale

Detailed characterisation of morphology of doped hydrotalcites as catalysts precursors. Trends of material stability, pore size distribution, particle size as a function of the nature of dopants. Data on the flow synthesis method and reproducibility of materials that can be attained by this method.

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