FE-SEM figures (top-view and cross-sectional view) of TiO2 films annealed at 400 °C.
FE-SEM figures (top-view and cross-sectional view) of TiO2 films annealed at 400 °C.

In the present work, anatase TiO2 films are prepared by sol–gel spin coating method. The structural and optical properties of the films have been studied at different post-annealing temperatures. The photocatalytic activity and electrochromic performance of the films are investigated. The films annealed at 400 °C exhibit the highest photocatalytic activity with a rate constant of 4.56×10−3 min−1. The electrochromic performance for the films annealed at 400 °C expressed in terms of difference in optical density (ΔOD) at 550 nm between coloured and bleached state is 0.5493. This combination of photocatalysis and electrochromism makes the sol–gel derived titania thin films as promising candidates for self-cleaning smart window applications.

This paper was originally published in Materials Science in Semiconductor Processing 26, (2014), 251–258.

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