SKU: 82521214430

Flower-like MgAl-LDH

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Flower-like MgAl-LDHProduct Name Name: Name: Flower like MgAl LDH Product Overview Layered double hydroxides (LDHs) are 2D hydrotalcite materials consisting of a positively charged main layer and exchangeable interlayer anions. Generally, it can be expressed as [M2+1 xM3+x(OH)2]x+[(An )x n]x mH2O (M2+ and M3+ are bivalent Ni2+, Co2+, Fe2+ and trivalent metal ions Al3+, V3+ and Cr3+, respectively, and An is an interlayer anion (carbonate and nitrate). x is the molar ratio

Product Name

Name: Name: Flower-like MgAl-LDH


Product Overview

Layered double hydroxides (LDHs) are 2D hydrotalcite materials consisting of a positively charged main layer and exchangeable interlayer anions. Generally, it can be expressed as [M2+1-xM3+x(OH)2]x+[(An-)x/n]x-·mH2O (M2+ and M3+ are bivalent Ni2+, Co2+, Fe2+ and trivalent metal ions Al3+, V3+ and Cr3+, respectively, and An- is an interlayer anion (carbonate and nitrate). x is the molar ratio of M3+/(M2++M3+). For the preparation of LDHs, the main preparation methods include chemical precipitation, hydrothermal method, solvothermal method and so on. 1. The chemical precipitation method uses homogeneous chemical precursors as the substrate material, in which two or more metal ions are intricately mixed together and produce synergies to form the desired material. The main preparation process is to dissolve the bivalent and trivalent metal nitrate chemicals in deionized water with a certain molar ratio, and stir for a period of time at the appropriate temperature (generally 60 ° C), and then add the NaOH solution drop by drop and maintain the pH of the solution at about 10 ~ 11, stir for a period of time, and place it at the appropriate temperature after aging. 2. Hydrothermal method is usually used to enhance the crystallinity of layered double hydroxides. Hydrothermal method can obtain well-crystallized and evenly layered double hydroxides. The main preparation process is to mix the bivalent and trivalent metal nitrate chemicals and urea in aqueous solution to form a homogeneous solution in a certain ratio, and then add it to the reaction kettle for the corresponding time to prepare. 3. Solvothermal method is a simple and environmentally friendly method. Similar to the hydrothermal method, the difference is that hydrothermal is to mix two metals in an aqueous solution to form a homogeneous solution, while solvothermal is to mix two metals in an organic solution to form a homogeneous solution, and then put it into the reactor at a higher temperature reaction preparation.


Technical Parameter

 

 

 

Status:White powder

Element content:C:~17wt%、O:~58%、Mg:16wt%、Al:9wt%(EDS)

Particle diameter:1-4μm(SEM)

Aperture(average):19nm

BET:~13m2/g

Note:The specific surface area of the particles was measured in a single time,and a small amount of fluctuations was allowed between different batches.


 

Product Features

 

Adjustability: Suitable metal ions can be selected according to the needs of the catalyst for type or quantity modulation, so as to obtain different functions of LDHs.

Structural memory effect: LDHs can be converted into relatively stable bimetallic oxide LDOs under high temperature roasting conditions, which has good thermal stability and multi-layer pore structure, and has been widely used in the field of electrochemistry.

Strippable layer and assembly: The interaction force between LDHs laminates is relatively weak, and it is easy to be destroyed by external forces, and it is stripped into a single-layer nanosheet structure.


Application Fields

 

Electrolytic water oxygen/hydrogen evolution reaction: LDHs containing transition metal ions Fe, Co, Ni, Mn, etc., is a good OER catalyst. For example, NiFe LDHs is one of the catalysts with the best OER properties, and is also considered to be a promising non-precious metal based OER electrocatalyst. LDHs can effectively adsorb hydroxyl species, such as CoNi-LDHs has good HER activity under alkaline conditions, and its activity is much higher than Ni(OH)2 and Co(OH)2.

Biomedical field: Good biocompatibility, low toxicity, lamellae structure can accommodate biomolecules, such as the use of CoMn-LDH nanosheets loaded with photosensitizer Ce6 for photodynamic/chemokinetic synergistic therapy to inhibit tumor growth.

Ion adsorption: Due to the special layered structure of LDHs and the strong ion exchange characteristics of interlayer anions, LDHs materials are usually used for the adsorption of heavy metal ions in sewage, such as selenium (VI), arsenic (III, V) and so on.

Supercapacitors: Layered metal hydroxide is a typical Faraday pseudocapacitor material, which has a high theoretical specific capacitance and is a promising electrode material for supercapacitors. LDHs has a large specific surface area, more active sites and a short diffusion distance, which facilitates the rapid migration of ions between the nanosheet surface and the electrolyte, thus significantly improving the Coulomb efficiency of the device.


Related Information

Please e-mail for the detailed characterization data.

E-mail:[email protected]

 

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Draper, US
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Format: Kindle
James Sire has been a wonderful companion to many Christians who are called to use their intellect. I have been a fan of his ever since his book Scripture Twisting. Sire provides a great service to the Christian community first by identifying the many ways in which we engage in defense of the faith. We tend to think of great speakers in front of skeptical audiences, but there are many other ways in which apologetics is useful and necessary, such as when we are speaking to friends. Any time we are responding to their objections to Christianity, we can do so in a winsome and knowledgeable manner, even if we aren't an intellectual giant like Sire. Second, Sire identifies that types of personality characteristics and character traits necessary to pursue apologetics as a vocation. Of course, the primary characteristic is one of pursuing God. Included with this is some discussion about how we might recognize a calling in defense of the faith. Many pastors want to equip us in ministry, but Sire's discussion actually gets down to helping us recognize if this is our calling. Sire provides some pointers to great books on the major issues we might have to deal with. It's always good to have a book of great sources I also like the many examples he provides in his book about encounters with people, including mistakes he has made. I hope this will have a wide audience and encourage others to consider this calling.
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I very weak primer on apologetics. The author is really not convinced himself; so, it is difficult for him to present convincing arguments.
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Reviewed in the United States on February 9, 2013
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