AI Article Synopsis
- - The main challenges in artificial photosynthesis are the inefficient separation of photogenerated carriers and weak CO adsorption, which hinder overall performance.
- - By embedding sodium ions in graphitic carbon nitride (g-CN), the directional movement of electrons to sodium sites is enhanced, leading to better CO adsorption and activation.
- - The modified sodium g-CN (NaCN) demonstrates a significant improvement in photocatalytic activity for CO reduction, achieving a yield of 371.2 μmol g h under simulated sunlight, which is 58.9 times greater than regular g-CN.
Article Abstract
The depressed directional separation of photogenerated carriers and weak CO adsorption/activation activity are the main factors hampering the development of artificial photosynthesis. Herein, Na ions are embedded in graphitic carbon nitride (g-CN) to achieve directional migration of the photogenerated electrons to Na sites, while the electron-rich Na sites enhance CO adsorption and activation. Na/g-CN (NaCN) shows improved photocatalytic reduction activity of CO to CO and CH, and under simulated sunlight irradiation, the CO yield of NaCN synthesized by embedding Na at 550°C (NaCN-550) is 371.2 μmol g h, which is 58.9 times more than that of the monomer g-CN. By means of theoretical calculations and experiments including in situ fourier transform infrared spectroscopy, the mechanism is investigated. This strategy which improves carrier separation and reduces the energy barrier at the same time is important to the development of artificial photosynthesis.
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| http://dx.doi.org/10.1016/j.jcis.2024.05.003 | DOI Listing |
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