Enhanced Photoelectrocatalytic degradation of azo-dye pollutants using transparent titania nanotube arrays glass electrode

Transparent and highly ordered titania nanotube arrays (TNAs) film electrode was synthesized by anodization from the sputtered titanium (Ti) film on a conductive glass and then applied in the degradation of Acid-orange 7 (AO7) model wastewater. The resulting nanotubes have a length of similar to 900nm and a pore diameter of similar to 80nm, resting upon a thin barrier layer. Using 20mg L-I AO7 solutions as a model system, the removal rate of AO7 by the TNAs glass electrode reaches 95.9% within 180min for the fixed bias potential, higher than 86.2% removal by the TNAs metal electrode under the same treatment conditions.