Photocatalytic reduction of CO2 with H2O over modified TiO2 nanofibers: Understanding the reduction pathway
2016 (English)In: Nano Reseach, ISSN 1998-0124, E-ISSN 1998-0000, 1-13 p.Article in journal (Refereed) PublishedText
Nanosized metal (Pt or Pd)-decorated TiO2 nanofibers (NFs) were synthesized by a wet impregnation method. CdSe quantum dots (QDs) were then anchored onto the metal-decorated TiO2 NFs. The photocatalytic performance of these catalysts was tested for activation and reduction of CO2 under UV-B light. Gas chromatographic analysis indicated the formation of methanol, formic acid, and methyl formate as the primary products. In the absence of CdSe QDs, Pd-decorated TiO2 NFs were found to exhibit enhanced performance compared to Pt-decorated TiO2 NFs for methanol production. However, in the presence of CdSe, Pt-decorated TiO2 NFs exhibited higher selectivity for methanol, typically producing ∼90 ppmg−1·h−1 methanol. The CO2 photoreduction mechanism is proposed to take place via a hydrogenation pathway from first principles calculations, which complement the experimental observations.
Place, publisher, year, edition, pages
Springer Science+Business Media B.V., 2016. 1-13 p.
TiO2 photocatalysis CdSe quantum dots CO2 photoreduction
IdentifiersURN: urn:nbn:se:umu:diva-120494DOI: 10.1007/s12274-016-1087-9ISI: 000378523300009OAI: oai:DiVA.org:umu-120494DiVA: diva2:929009