Study of Improvement Technology of Photocatalytic Activity on the TiO_2 Sol by Plasma Treatment After Dip-Coating Processing

摘要

We have deposited titanium dioxide TiO_2 thin films on glass using a single molecular precursor such as titanium (IV) isopropoxide (Ti[OCH(CH_3)_2]_4, 97%) by sol–gel processing. Argon and oxygen rf plasma treatments at 295 K for 0.5 h in the power range of 50–200 W were also used to elevate photocatalytic activity of the as-grown TiO_2 films. A superhydrophilic property and surface morphology change appeared in the light irradiation with O_2 plasma treatment. In this work, the effect of the plasma with photocatalyst (TiO_2) on the improvement of hydrophilic properties has mainly been investigated. Photocatalytic activity was evaluated by measurements of the uv/vis. irradiation, refractive index, contact angle, and AFM analysis. We confirmed that plasma treatment is a very reliable method for the synthesis of TiO_2 thin films with high catalytic performance.