Efficient purification of surface modified nanoparticles from its nanosuspension by using supercritical CO2 technology

Controlled Nickel Nanoparticles: A Review on How Parameters of Synthesis Can Modulate Their Features and Properties

“…Another relevant aspect of purification is the affinity and chemical nature of the impurities and solvents used in the separation process. Unwanted components can be classified into ionic and molecular components, and the separation of molecular components can be based on solubility, polarity, or dielectric constant [92,105]. Ionic components, which are soluble in water, can be completely removed using water as a solvent with successive separation cycles [103,106].…”

“…Molecular compounds can be eliminated using molecular solvents such as ethanol, isopropyl alcohol, and acetone, depending on the solubility, polarity, and dielectric constant of the impurity. In a hypothetical synthesis involving different components with distinct solubility, polarity, and dielectric constant, it is necessary to use solvents with ascending or descending dielectric constants in sequence to enable miscibility between the anterior and posterior solvents [105,106].…”

Low temperature synthesis of ZnO particles using a CO2-driven mechanism under high pressure

“… 22,23 Furthermore, it is revealed in our recent research that scCO 2 can be used as not only synthesis medium but also washing and drying solvents for the particle production. 24 These appealing characteristics enable the simple production process without using an organic solvent and a post-treatment. Therefore, scCO 2 has been used as a synthesis field of various inorganic particles such as metal, 25–27 metal oxide 28–31 and metal sulfide.…”