Mechanochemical Synthesis of Double Tin and Alkaline Earth Metal Hydroxides

2018 ◽  
Keyword(s):  
Mechanochemical Synthesis ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Metal Hydroxides

scholarly journals Mechanochemistry of fluoride solids: from mechanical activation to mechanically stimulated synthesis

ChemTexts ◽  
2021 ◽  
Vol 7 (2) ◽  
Author(s):  
Gudrun Scholz
Keyword(s):  
Mechanical Activation ◽  
Mechanochemical Synthesis ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Technical Equipment ◽  
Metal Compounds ◽  
Potential Applications ◽  
The Given ◽  
Mechanochemical Reactions

Abstract This lecture text is focused on the comparatively young field of mechanochemistry of fluoride solids, considering both their mechanical activation and their mechanochemical synthesis. Beside a literature survey, the mechanochemical synthesis of binary fluorides MF2, MF3, of complex fluorides MMgF4, of solid solutions MaxMb1−xF2 or M1−xLnxF2+x (Ln: Y, Eu) and of fluorine-containing coordination polymers is presented. Owing to their interesting potential applications in the field of fluoride ion conductivity or luminescence properties when doped, most of the given examples are alkaline earth metal compounds. A short historical survey, remarks on peculiarities and consequences of mechanical activation as well as the necessary technical equipment for mechanochemical reactions precede the section. Graphic abstract

Synthesizing Alkaline Earth Metal Hydroxides Nanoparticles through an Innovative, Single-Step and Eco-Friendly Method

2019 ◽  
Vol 286 ◽  
pp. 3-14 ◽  
Author(s):  
Giuliana Taglieri ◽  
Valeria Daniele ◽  
Ludovico Macera
Keyword(s):  
Alkaline Earth ◽  
Aqueous Suspension ◽  
Exchange Process ◽  
Earth Metal ◽  
Single Step ◽  
Alkaline Earth Metal ◽  
Monoclinic Crystal ◽  
Metal Hydroxides ◽  
Crystal Lattices ◽  
Ion Exchange Process

The objective of this paper is to introduce a patented and eco-friendly method to synthesize aqueous suspension of all types of alkaline-earth metal hydroxides nanoparticles (NPs). This method is based on an ion exchange process; the exchange takes place at ambient temperature/pressure, starts from cheap or renewable reagents and, in one single step, results in the creation of the crystalline desired nanoparticles in only a few minutes. In terms of structural and morphological features, the synthesized nanoparticles are characterized by means of XRD-Rietveld refinement, FTIR, and TEM. In particular, we obtained pure and crystalline magnesium and calcium hydroxide suspensions, showing the typical brucite crystal structure with a hexagonal lamellar morphology and dimensions generally <100 nm. With respect to the strontium and barium hydroxide suspensions, we observed different kinds of hydroxides (either anhydrous and hydrate forms), characterized by orthorhombic or monoclinic crystal lattices with rod-like nanostructured morphologies. Despite the different morphologies, all synthesized nanoparticles appear constituted by a superimposition of primary nanoparticles, of dimensions ranging from a few to 15 nm, correlated to the increase in the atomic number of the alkaline earth metal.

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