TY - JOUR
T1 - Photocatalytic reduction of CO2 with H2O over modified TiO2 nanofibers: Understanding the reduction pathway
AU - Sarkar, Anjana
AU - Gracia-Espino, Eduardo
AU - Wågberg, Thomas
AU - Shchukarev, Andrey
AU - Mohl, Melinda
AU - Rautio, Anne-Riikka
AU - Pitkänen, Olli
AU - Sharifi, Tiva
AU - Kordas, Krisztian
AU - Mikkola, Jyri-Pekka
N1 - tk.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
KW - engineering education
KW - engineering education
KW - engineering education
U2 - 10.1007/s12274-016-1087-9
DO - 10.1007/s12274-016-1087-9
M3 - Artikel
SN - 1998-0124
VL - 9
SP - 1956
EP - 1968
JO - Nano Research
JF - Nano Research
IS - 7
ER -