Thermally stable (not sinterable) Pt/SnO2 (metal/semiconductor) nanocomposite particles were successfully prepared by chemical methods consisting of thermohydrolysis of SnCl4, hydrothermal processes of resultant SnO2 nanoparticles and subsequent photo-deposition of Pt using H2PtCl6. XRD, HRTEM, EDS and XPS examinations revealed that platinum nanodomains (about 2 nm in size) could be deposited on the surface of nanocrystalline SnO2 particles (about 8 nm). After annealing the Pt/SnO2 nanopowders at 500 °C, their specific surface area was found to be still higher than 100 m2 g-1, thereby indicating high thermal stability against particle growth and sintering. These results show an important aspect in loading nanomaterials in practical devices without losing the nanocrystalline nature.
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
- Electrical and Electronic Engineering