From silicon to silica: a green chemistry approach for hollow sphere nanoparticle formation.

ABSTRACT: Herein we report on an environmentally friendly and scalable production route for hollow silica spheres (HSSs). The process is based on close to 100% conversion of non-crystalline solid Si nanoparticles (D̄ = 40 ± 9 nm) in mild alkaline solutions (pH ≤ 9.0) at ambient temperature. The Si nanoparticles are prepared using the centrifugal chemical vapor deposition (cCVD) method. Combining transmission electron microscopy (TEM) imaging and nanoparticle size analysis with hydrogen evolution data, elemental mapping, and nitrogen adsorption for surface area measurement, we show for the first time experimental data that document a Kirkendall type Si-to-HSS formation process. Our understanding is that the Si nanoparticles exposed to air form a SiO₂ film, which is stable in the mil

SUBMITTER: Johnsen HM 

PROVIDER: S-EPMC11467762 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature