Photocatalytic degradation of textile dyestuffs using TiO₂ nanotubes prepared by sonoelectrochemical method

Highlights: • TiO₂ nanotubes prepared by electrochemical and sonoelectrochemical method. • More regular TiO₂ nanotubes diameters prepared by sonoelectrochemical method. • Obtained nanotubes were used in the photocatalytic degradation of Orange G dye. • TiO₂ nanotubes prepared by sonoelectrochemical method showed 10% faster degradation of Orange G dye compared with the one by electrochemical method. - Abstract: TiO₂ nanotubes were prepared by anodization of Ti plates by conventional electrochemical technique as well as by an emerging sonoelectrochemical technique. Scanning electron miscroscope (SEM) analysis showed that ultrasound assisted anodization yielded more ordered and controllable TiO₂ tube banks with higher tube diameter. The photocatalytical activities of TiO₂ nanotubes were tested in the photocatalytical degradation of Orange G dye. The results showed that sonoelectrochemically prepared TiO₂ tubes exhibited 10% higher photocatalytic performance than the electrochemical prepared ones, and more than 18% higher activity than the other TiO₂ samples