| Autor: |
Dos Santos Silva, Dyego, Villegas, Alexander Eduardo Caytuero, Bonfim, Rodrigo de Paiva Floro, Salim, Vera Maria Martins, De Resende, Neuman Solange |
| Zdroj: |
Journal of CO2 Utilization; September 2022, Vol. 63 Issue: 1 |
| Abstrakt: |
Aiming at developing photoactive materials on the photocatalytic reduction of CO2with H2under UV light, iron-doped hydroxyapatites were evaluated through online diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) coupled with quadrupole mass spectrometer (QMS). The photocatalysts with iron content ranging from 0 to 26 wt% had a specific surface in the range of 32.6–128.0 m2.g−1and bandgap energy values between 2.08 and 4.92 eV, respectively. Mossbauer spectroscopy combined with X-ray diffraction results confirmed the iron dispersion in the hydroxyapatite structure even in the sample with the highest metal content. The production of H2O, CO, and O2confirmed all photocatalysts were actives for CO2reduction. However, only the ≥ 10 wt% iron content samples presented selectivity for CH4and C2H4on this photoreaction. These results revealed iron-modified hydroxyapatite as a selective photocatalyst to obtain hydrocarbons. |
| Databáze: |
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