Partially cross-linked carbon nitride with unimpeded charge transfer between different chains for boosting photocatalytic hydrogen production

A heptazine-based, partially cross-linked carbon nitride (PC-CN) was successfully prepared via a solid-chloride-salt-assisted polycondensation method. The cross-linking favors the charge transport between different chains, thus dramatically boosting the photocatalytic hydrogen evolution activity of PC-CN, up to 29.3 times that of traditional 1D-CN. The cross-linking degrees of the prepared carbon nitrides can be controlled by the chloridion concentrations. The obtained heptazine-based, partially cross-linked carbon nitride (PC-CN) shows dramatically enhanced photocatalytic activity.