Nanomaterials | Platinum-doped TiO2 Nanofibers and Nanowires

Herein is summarized an easy large scale synthesis of TiO2 nanotubes which were doped with platinum and characterized towards their photocatalytic activity.

Summary

The microwave synthesis batch reactor Masterwave BTR allowed easy and convenient preparation of TiO2 nanotubes in the liter scale. At 230 °C the tubes could be synthesized within only 40 minutes.

In order to modify the resulting TiO2 nanofibers with platinum, they were stirred in an aqueous H2PtCl6 solution under UV irradiation. The photocatalytic activity was determined by degradation of a methylene blue solution under UV and visible light irradiation.

Compared to pure TiO2 nanofibers, the Pt-doped samples showed higher photocatalytic activity and can be used for degradation of harmful organic compounds as well as for hydrogen production by water splitting.

Key Findings

Microwave-assisted heating

  • Elevated temperatures were easily achieved with Masterwave BTR.
  • Reaction volume of 700 mL could be conveniently processed.
  • Optimum stirring rate was 700 rpm.

Properties of Pt-doped TiO2 nanofibers and nanowires

  • Specific surface area = between 70 and 150 m2/g
  • Diameter of anatase nanowires = 10 nm
  • Length of anatase nanowires = 15 m

Photocatalytic activity of Pt-doped TiO2 nanofibers and nanowires

  • Highest activity with 1.22% Pt
  • Modification with platinum allows to increase the activity by up to 3 % under UV irradiation and up to 11.5 % under visible light irradiation.

Learn more about the Masterwave BTR