Core-shell nanoparticles by silica coating of metal oxides in a dual-stage hydrothermal flow reactor

H L Hellstern; A Mamakhel; M Bremholm; B B Iversen

doi:10.1039/c5cc09743f

Core-shell nanoparticles by silica coating of metal oxides in a dual-stage hydrothermal flow reactor

Chem Commun (Camb). 2016 Feb 25;52(16):3434-7. doi: 10.1039/c5cc09743f.

Authors

H L Hellstern¹, A Mamakhel¹, M Bremholm¹, B B Iversen¹

Affiliation

¹ Center for Materials Crystallography, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark. [email protected].

PMID: 26832849
DOI: 10.1039/c5cc09743f

Abstract

γ-Fe2O3@SiO2, TiO2@SiO2, and α-Fe2O3@SiO2 core-shell nanoparticles were synthesized by a surfactant-free hydrothermal method in a continuous flow dual-stage reactor. Uniform silica shells of 2 nm thickness were obtained when grown on γ-Fe2O3 and TiO2 nanoparticles while thicker and more irregular shells were deposited on α-Fe2O3 due to low pH.