Multilayer Films of Cerium Doped TiO₂ for Photocatalytic Reduction of CO₂

Authors

  • M. Reli Institute of Environment Technology, VŠB-TU Ostrava, Ostrava
  • P. Huo Institute of Environment Technology, VŠB-TU Ostrava, Ostrava
  • I. Troppová Institute of Environment Technology, VŠB-TU Ostrava, Ostrava
  • L. Matějová Institute of Environment Technology, VŠB-TU Ostrava, Ostrava
  • Z. Matěj Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Prague
  • S. Daniš Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Prague
  • L. Obalová Institute of Environment Technology, VŠB-TU Ostrava, Ostrava
  • K. Kočí Institute of Environment Technology, VŠB-TU Ostrava, Ostrava

Keywords:

photocatalysis, carbon dioxide, titanium dioxide, cerium, thin films

Abstract

Carbon dioxide, generated largely from combustion of fossil fuels, is one the most discussed gases of present time. It is one of the major greenhouse gases and also the most abundant and not utilized carbon source. This work is focused on photocatalytic reduction of carbon dioxide to not only reduce its emissions, but also to convert it into more useful products like methane, methanol, formic acid and others. The photocatalytic reduction of CO2 was carried out in the gas phase in the presence of cerium doped TiO2 photocatalysts in the form of multilayer films. All the prepared photocatalysts were characterized by available methods; the products of the reaction were methane, carbon monoxide and hydrogen, which originated from the photocatalytic water splitting. The photocatalysts with higher amount of cerium (15 and 25 wt.%) were the most active. Both these samples were amorphous and showed more than twice as high photoactivity compared to multilayer film of TiO2. Such a high photocatalytic activity of amorphous samples is probably connected to lower recombination rate of electrons and holes due to amorphous TiO2 acting as hole scavenger and the cerium in ion form (Ce4+) acting as electron scavenger.

Published

2017-10-15

How to Cite

Reli, M., Huo, P., Troppová, I., Matějová, L., Matěj, Z., Daniš, S., Obalová, L., & Kočí, K. (2017). Multilayer Films of Cerium Doped TiO₂ for Photocatalytic Reduction of CO₂. Chemické Listy, 111(10), 667–672. Retrieved from http://chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/1505

Issue

Section

Articles