New Synthetic Method of MgF2 Hollow Nanoparticles by Fluorination of Raw Material Particle Surfaces　—Toward Low-temperature Mass Synthesis

• Published in: Funtai Kogakkaishi Vol. 61; no. 2; pp. 91 - 97
• Main Authors: Hattori, Shinichi, Tsuji, Ryusuke, Sato, Keisuke, Okada, Yoshiki, Yonezawa, Tetsuo, Kinoshita, Takuya, Omoto, Shin
• Format: Journal Article
• Language: English; Japanese
• Published: Kyoto The Society of Powder Technology, Japan 10.02.2024; Japan Science and Technology Agency
• Subjects: Core-shell particles; Fluorination; Gas-solid reactor; Hydrochloric acid; Hydrochloric acid dissolution; Hydrofluoric acid; Low temperature; Magnesium fluorides; Mg(OH)2 nanoparticles; MgF2 hollow nanoparticles; Nanoparticles; Raw materials; Surface fluorination reaction; Synthesis
• ISSN: 0386-6157; 1883-7239
• DOI: 10.4164/sptj.61.91

We conducted research aimed at developing a novel method for synthesis of MgF2 hollow nanoparticles that is simpler than the conventional synthetic method. First, Mg(OH)2 raw material nanoparticles were contact with hydrofluoric acid vapor in a gas-solid reactor at 473 K. As a result, the surfaces of the Mg(OH)2 nanoparticles were fluorinated to obtain Mg(OH)2-MgF2 core-shell particles. Next, the MgF2 hollow nanoparticles were synthesized by soaking the core-shell particles in 1.0 mol/L hydrochloric acid to dissolve only the Mg(OH)2 core portion. We have succeeded in developing a method for synthesizing MgF2 hollow nanoparticles with different MgF2 shell thicknesses by controlling the surface fluorination reaction period of Mg(OH)2 raw material nanoparticles.