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Photocatalytic reduction of CO2 with H2O over modified TiO2 nanofibers: Understanding the reduction pathway
Umeå University, Faculty of Science and Technology, Department of Chemistry.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Chemistry.
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2016 (English)In: Nano Reseach, ISSN 1998-0124, E-ISSN 1998-0000, 1-13 p.Article in journal (Refereed) Published
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Abstract [en]

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.
Keyword [en]
TiO2 photocatalysis CdSe quantum dots CO2 photoreduction
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-120494DOI: 10.1007/s12274-016-1087-9ISI: 000378523300009OAI: oai:DiVA.org:umu-120494DiVA: diva2:929009
Available from: 2016-05-17 Created: 2016-05-17 Last updated: 2016-08-01Bibliographically approved

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Sarkar, AnjanaGracia-Espino, EduardoWågberg, ThomasShchukarev, AndreySharifi, TivaMikkola, Jyri-Pekka
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CiteExportLink to record
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