Development of a titania nanotube (TNT) loaded site-selectively with Pt nanoparticles and their photocatalytic activities

Site-selective deposition of Pt nanoparticles on a titania nanotube (TNT) was investigated in order to improve the photocatalytic activity of a TNT. TEM images showed that Pt nanoparticles were deposited site-selectively on the inside surface of the TNT by two methods. TNT powder loaded with Pt nanoparticles by UV irradiation under ethanol atmosphere exhibited the highest photocatalytic activity for oxidation of acetaldehyde. When Pt nanoparticles were deposited on only the inside surface of the TNT by UV irradiation, active sites on the TNT were not covered by Pt nanoparticles, resulting in an increase in its photocatalytic activity for oxidation of acetaldehyde.

We investigated site-selective deposition of Pt nanoparticles on the inside surface of titania nanotube (TNT) in order to improve the photocatalytic activity of the TNT. TNT loaded site-selectively with Pt nanoparticles by UV irradiation under ethanol vapor showed the highest photocatalytic activity because the transfer rates of electrons were fastest and the active sites on TNT surface were not covered by Pt nanoparticles.Figure optionsDownload as PowerPoint slide