One-Step Synthesis of Dicyanobenzene-Derived Nitrogen-Doped Porous Carbon Monolayers: Porosity and Near-infrared Photoactivity

摘要

We present a facile and one-step synthesis of a N-doped porous carbon (NPC) material by direct heating of dicyanobenzene in the presence of ZnCl2, free from any pre-or post-treatment. The resultant NPC material features graphite-like monolayers with a thickness of approximately 1.4 nm, as proven by microscopy technology. NPC shows a BET surface area of 3038.5 m(2) g(-1) and a narrow pore-size distribution centered at 0.51 nm. As a consequence, NPC displays a high H-2 uptake of up to 2.96 wt% at 77 K and a CO2 adsorption capability of 23.4 wt% at 278 K and 0.1 MPa. N-doping leads to extension of the optical absorption of NPC into the near-infrared (NIR) region. This N-decorated carbon material, as the first example of a NIR-triggered carbon photocatalyst, exhibits pronounced H-2 production capabilities. Carbonization of aromatic multinitriles would be a general and facile approach to prepare multifunctional N-doped carbon materials for gas storage and full solar spectrum driven photocatalysts.