(Digital Presentation) Production and Characterization of TiO₂-Based Photocatalyst

Abstract

TiO2-based nanostructures have received great attention in the past few years owing to their promising applications in water purification systems, sterilization, self-cleaning surfaces, photoelectrochemical conversion, and hydrogen evolution. However, the low-cost and environment-friendly synthesis procedure is an important step for transferring it to commercialization and industry application. Anodizing, one of the newest and most promising procedures in nanomaterial synthesis, is an electrodeposition process for creating nanotubes by altering the surface of the titanium. A variety of parameters influence the thickness of the oxide layer and the size of the nanotube formed during this process, including time, current density, applied voltage, electrolyte solution PH, and temperature. In this work, different anodizing times of 5, 10, 15, 20, 25, and 30 min as well as various voltages are examined to achieve the best conditions for making a titanium oxide nanotube substrate. We showed that the best-synthesized titanium oxide nanotube substrate with appropriate crystal size and optoelectrical properties was produced in 30 minutes at 20 volts.