Green synthesis of ultrathin edge-activated foam-like carbon nitride nanosheets for enhanced photocatalytic performance under visible light irradiation
Fabrication of few-layered polymeric carbon nitride (PCN) photocatalyst has attracted increasing attention due to its substantial enhancement of the photocatalytic performance. A green strategy for synthesis of ultrathin PCN nanosheets with integration of high-efficiency and enriched active edges with minimizing chemicals and energy input is overwhelmingly required and still challenging. Herein, we report a green, cost-effective and template-free synthesis approach for ultrathin foam-like PCN nanosheets with enriched active sites in wet atmosphere via “three-in-one” strategy. This strategy relies on coupling of melem segments polymerization with condensed layers delamination by water molecules and introducing of new termial groups solely in one-pot without any other additives. The obtained melem-derived PCN (MFCN-wet) shows high loosen and extremely light characteristic with formation of ultrathin few-layers. Furthermore, it exhibits high specific surface area and pore volume. Most importantly, enrich active sites with fast charge carrier transfer drastically enhance the hydrogen evolution rate and rhodamine B (RhB) degradation with high stability under visible light irradiation compared with that as-synthesized materials in nitrogen and air atmosphere. Such a sustanaible strategy would pave new opportunities for further environmental and energy applications.