Sustainable sonoprocess for synthesizing γ-GaO/InSn core-shell submicron particles via acoustic emulsification and oxidation of molten EGaInSn at room temperature.

This study investigated the sustainable room-temperature synthesis of InSn/γ-GaO core-shell particles via an acoustic route using molten eutectic Ga-In-Sn alloy (EGaInSn). Sonication was used for the emulsification and oxidation steps. During the emulsification step, the sonication of molten EGaInSn in ethanol (EtOH) at 45 kHz facilitated the formation of the smallest EGaInSn particles (average diameter, D = 782 nm).

Facile room temperature synthesis of size-controlled spherical silica from silicon metal via simple sonochemical process.

The waterglass or St o¨ ber method is commonly used to synthesize spherical colloidal silica; however, these methods have some disadvantages, such as complicated processes for the removal of sodium ions and expensive and energy-consuming raw materials such as tetraethoxysilane (TEOS). In this study, size-controlled spherical colloidal silica was synthesized from silicon metal at room temperature using an ultrasound process with hydrazine monohydrate as the solvent. Silicon metal dissolves easily in hydrazine monohydrate under ultrasound irradiation, and spherical colloidal silica can be synthesized by adding alcohol to this precursor solution.

Sonochemical synthesis of supersaturated Ga-Al liquid-alloy fine particles and Al-doped γ-GaO nanoparticles by direct oxidation at near room temperature.

In this study, we investigated the fabrication of supersaturated gallium (Ga)-aluminum (Al) liquid alloy and Al-doped γ-GaO nanoparticles (NPs) at near room temperature (60 °C) using sonochemical and sonophysical effects. Supersaturated Ga-Al liquid alloy microparticles (D = 1.72 µm) were formed and stabilized at 60 °C by the thermal nonequilibrium field provided by sonochemical hot spots.