Abstract
The microstructural and chemical properties of nanosized TiO 2 , obtained by the sol-gel procedure, were investigated. The specific surface area of TiO 2 was dependent on modifications of the general sol-gel procedure. A gradual decrease of the specific surface area (BET) from 169.9 to 2.7 m 2 g −1 with an increase of the calcination temperature up to 983 K was observed. At 913 K rutile was observed, together with a small amount of anatase. The grain size of the anatase phase changed from 4.5 ± 2 nm to 6.5 ± 2 nm when the temperature increased up to 913 K. The high specific surface area, small grain size, adequate porosity, and favorable phase composition of nanosized TiO 2 , synthesized in the present work, rendered this material suitable as photoelectrode in dye-sensitized solar cells.
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