Fe2O3:SnO2 Nanostructured System as Semiconductor Gas Sensor Material

摘要

In the present work, we report a detailed study based on transmission electron microscopy of the microstructune and composition of the FebOj: SnO2 nanometrical binary system obtained by sol-gel. We studied a set of samples based in a pure Fe2O3 material where we added SnO 2 from 0 to 50% Sn-Fe nominal content. The structure of our composites will change from pure a-Fe2O:i to the well-known cassiterite SnO 2 structure for high Sn content. Distortions on the structural parameters will be attributed to the presence Sn4+ ions on the a-Fe2O3 structure and Fe3+ ions on the SnOj cassiterite structure.