| Autor: |
Capobianco, Matt D., Jayworth, Josephine A., Shang, Bo, Harmon, Nia J., Wang, Hailiang, Brudvig, Gary W. |
| Zdroj: |
Chemistry of Materials; November 2023, Vol. 35 Issue: 22 p9747-9755, 9p |
| Abstrakt: |
Graphitic carbon nitride (g-C3N4) is a material that has been at the forefront of heterogeneous photocatalysis. Many factors, such as the synthesis temperature, have a drastic effect on the photocatalytic ability of g-C3N4. In this study, we utilize terahertz (THz) spectroscopy, an ultrafast probe of transient photoconductivity, to understand the effect the synthesis temperature has on the photoconductivity of g-C3N4. Samples were synthesized at seven different temperatures traditionally used to prepare g-C3N4. X-ray diffraction shows that the number of layers increases with an increasing synthesis temperature. IR spectroscopy shows that as the synthesis temperature increases, the structure begins to resemble the idealized g-C3N4structure. Optical characterization shows that synthesis temperatures of >600 °C begin to disrupt the structure. THz photoconductivity is the largest for the sample synthesized at 600 °C which is corroborated with the greatest photocatalytic CO2reduction. This study shows the power that THz spectroscopy has in understanding the fundamental properties in these emerging materials for photocatalysis. |
| Databáze: |
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