EFFECT OF SYNTHESIS TEMPERATURE ON THE PREPARATION OF TITANIUM DIOXIDES BY THE HYDROTHERMAL METHOD. PHOTOCATALYTIC ACTIVITY


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Abstract

TiO2 nanoparticles were prepared by the hydrolysis of titanium tetraisopropoxide (TTIP) using TMA (tetramethylamine) as a peptizer in the hydrothermal method. The photocatalytic degradation of Orange II has been studied in a batch reactor under UV light. The particle size was similar to that from hydrothermal treatment at 120-170°C, but it increased to 23 nm at 200°C. The titania particles prepared at 170°C and calcined at 600°C showed the highest activity in the photocatalytic decomposition ofOrange II.

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