1. A “green methodology” approach to the synthesis of HfO2 nanoparticles.
- Author
-
Quintero-García, J.S., Puente-Urbina, B.A., García-Cerda, L.A., Rodríguez-Fernández, O.S., and Mendoza-Mendoza, E.
- Subjects
- *
HAFNIUM oxide , *TRANSITION metal compounds synthesis , *SUSTAINABLE chemistry , *METATHESIS reactions , *MECHANICAL chemistry - Abstract
HfO 2 nanoparticles were successfully synthesized by a green chemistry method, which consist of mechanically activated metathesis and molten salts, using LiCl/KCl. This methodology is useful to prepare cubic phase at low-temperature (380 °C) without using any doping element, which is an outstanding advantage over existing techniques. Following this green route easily allows obtaining HfO 2 nanoparticles; showing irregular and spherical like morphologies with a diameter in the range of 8–20 nm by TEM observations and crystallite size of 6.5 and 14.7 nm calculated from Scherer's equation for cubic and monoclinic phases respectively. The temperature and reaction time parameters played a very important role for obtaining monoclinic or cubic phase during molten salt stage. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF