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Photocatalytic reduction of CO2 with H2O over modified TiO2 nanofibers: Understanding the reduction pathway
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
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2016 (engelsk)Inngår i: Nano Reseach, ISSN 1998-0124, E-ISSN 1998-0000, s. 1-13Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
Springer Science+Business Media B.V., 2016. s. 1-13
Emneord [en]
TiO2 photocatalysis CdSe quantum dots CO2 photoreduction
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URN: urn:nbn:se:umu:diva-120494DOI: 10.1007/s12274-016-1087-9ISI: 000378523300009Scopus ID: 2-s2.0-84965079827OAI: oai:DiVA.org:umu-120494DiVA, id: diva2:929009
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Bio4Energy
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Bio4EnergyTilgjengelig fra: 2016-05-17 Laget: 2016-05-17 Sist oppdatert: 2023-03-24bibliografisk kontrollert

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Sarkar, AnjanaGracia-Espino, EduardoWågberg, ThomasShchukarev, AndreySharifi, TivaMikkola, Jyri-Pekka

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