二维sp2碳共价有机框架及高效光催化制氢

In this paper, two types of conjugated, triazine-based covalent organic frameworks (COFs) with different connected linkages (imine bond and sp2-carbon-CN bond) are presented. The insignificant difference in the creates a remarkable their performance visible-light-driven hydrogen generation. fully π-conjugated two-dimensional (2D) COF showed an external quantum efficiency 13.48% at 450 nm, which is unprecedented result for photocatalysts. contrast, imine-linked 2D displayed almost no photoactivity. Further photoelectrochemical chemical studies provide in-depth understanding catalytic mechanism. This finding provides new insight into preparing high-performance photocatalysts solar energy conversion.