This new method describes the application of sonoelectrochemistry to quickly synthesize well-ordered and robust titanium dioxide (TiO2) nanotubular arrays. Self-ordered arrays of TiO2 nanotubes of 30-100 m in diameter and 300-1000 nm in length can be rapidly synthesized under an applied potential of 5-20 V. The rate of formation of the TiO2 nanotubes by the sonoelectrochemical method is found to be almost twice as fast as the magnetic stirring method. It also demonstrates that high-quality nanotubes can be prepared using high viscous solvents like ethylene glycol under ultrasonic treatment. The TiO2 nanotubes prepared in the organic electrolytes (ethylene glycol) are then annealed under H-2 atmosphere to give TiO2-xCx types material having a band gap of around 2.0 eV. This process is found to be highly efficient for incorporating carbon into TiO2 nanotubes. Various characterization techniques (viz., FESEM, GXRD, XPS, and DRUV-vis) are used to study the morphology, phase, band gap, and doping of the nanotubes. The photoelectrocatalytic activity of these materials to generate H-2 by water splitting is found to be promising at 0.2 V vs Ag/AgCl. (c) 2007 Elsevier Inc. All rights reserved.