| 초록 |
Recently, graphitic carbon nitride (g-C3N4) has been issued because it is a promising visible-light-driven photocatalyst. However, bulk g-C3N4 has low photocatalytic activity due to its low surface area and fast recombination of photo-generated charge carriers. Herein, we fabricated the 3D porous g-C3N4 with uniformly deposited cocatalyst using dendritic fibrous nanosilica (KCC-1) as a sacrificial template. Due to the unique opened porous structure of KCC-1, it gives the highly accessible mesoporous structure of g-C3N4 which has 12 times higher surface area than bulk g-C3N4. Furthermore, uniform nanoparticles of Pt and Co3O4 could be synthesized with unique mesoporous structure of KCC-1. Such cocatalysts enhance the visible-light absorption and charge separation. Thus, this photocatalyst system has the enhanced visible light absorption, fast charge separation and high photocurrent. As a result, it has 4 times higher rate constant in methylene blue degradation than bulk g-C3N4. |
