Thermal Properties of Surface-Modified alpha- and epsilon-Fe2O3 Photocatalysts Determined by Beam Deflection Spectroscopy

摘要

In this work, a photothermal beam deflection spectroscopy setup is developed and applied for determination of the thermal parameters (thermal diffusivity and thermal conductivity) of alpha- and epsilon-Fe2O3 nanodeposits on Si(100) substrates, specifically designed and tested as photocatalysts. It was observed that thermal parameters of the material strongly depend on the sample composition and morphology, which affect also the photocatalytic activity. The correlation between the thermal and photocatalytic properties are critically discussed based on the characteristics of the materials.