Release time:2024-03-18  Hits:

• Journal:International Conference on Development and Application of Carbon Nanomaterials in Energetic Materials
• Abstract:Graphite carbon nitride (g-C3N4), as one of the promising candidates for photocatalytic hydrogen evolution, owns the advantages of visible light response, good stability, and no harm to the environment. However, the photocatalytic water splitting of g-C3N4 has been limited due to its slow photocarrier transfer rate and insufficient light absorption. Herein, carbon dots (CDs) were prepared by a hydrothermal method using ginkgo biloba leaves as the raw material. Afterwards, the g-C3N4 nanosheets decorated with CDs were obtained by a thermal polymerization method. CDs have unique way of light-induced charge transfer and special heterogeneous interface. The reservoir characteristics of the composite enable to greatly reduce the recombination of photo-generated carriers and significantly improve the hydrogen evolution efficiency. In this work, we found that g-C3N4 decorated with 1.0 wt% CDs achieved the highest hydrogen evolution rate (2878.2 μmol/h/g) under visible light (λ > 420 nm), which was about 5 times higher than that of pristine g-C3N4 (582.2 μmol/h/g). Schematic illustration of the separation and transfer of photo-generated charge carriers of CDs-g-C3N4 nanoparticles under visible light irradiation.
• Key Words:CDs G-C3N4 Photocatalytic Water splitting
• Translation or Not:no