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Nanosized TiO 2 particles, synthesized by microemulsion mediated method, were characterized by XRD, TEM, EDS and BET. To judge the activity of TiO 2 particles, the photocatalytic destruction of phenol in aerated suspension was studied. The result shows that the photocatalytic activity of lab made nanometer anatase TiO 2 is comparable to or higher than that of commercial titania particles. The effects of some processing parameters such as TiO 2 content, oxygen flow rate, pH value on phenol removal were also investigated. The experimental results indicate that there is an optimum value for the TiO 2 content. Sufficient O 2 supply is needed, but too high gas flow rate induces large bubbles that eliminate the gas residence time and the gas/liquid contact interface. The pH value of the phenol solutions has a complex effect on the photocatalytic activity of the particles.
Nanosized TiO 2 particles, synthesized by microemulsion mediated method, were characterized by XRD, TEM, EDS and BET. To judge the activity of TiO 2 particles, the photocatalytic destruction of phenol in aerated suspension was studied. The effects of some processing parameters such as TiO 2 content, oxygen flow rate, pH value on phenol removal were also investigated. The experimental results indicate that there is an optimum value for the TiO 2 content. Sufficient O 2 supply is needed, but too high gas flow rate induces large bubbles that eliminate the gas residence time and the gas / liquid contact interface. The pH value of the phenol solutions has a complex effect on the photocatalytic activity of the particles.