Fabrication of TiO 2 photocatalytic electrode and contamination control with atmospheric pressure O 2 plasma jet

In this study, we demonstrate the fabrication of TiO 2 photocatalytic electrode by sol‐gel and electrospinning technique. The anatase TiO 2 nanofiber is successfully formed after thermal annealing at 260°C. As‐prepared TiO 2 photocatalytic electrode contains surface contamination, which includes a polymer binder such as ethyl cellulose, carbon by carbonization of polyvinylpyrrolidone, and residue polyvinylpyrrolidone. To efficiently remove the surface contaminants from the TiO 2 photocatalytic electrode, we employ an atmospheric‐pressure O 2 plasma jet and the exposure time is controlled by the scanning rate. As the results, photodegradation efficiency of methylene blue is significantly enhanced with a scanning rate in the range of 100‐500 μm/s and was saturated with a scanning rate in the range of 10‐100 μm/s.