Electronic Modulation of K⁺-Intercalated Polymeric Carbon Nitride via ─C≡N/─OH Functionalization for Efficient Photocatalytic H₂O₂ Production.

ABSTRACT: Polymeric carbon nitride (PCN) holds great promise for photocatalytic H₂O₂ production owing to its excellent stability and structural tunability. However, the inferior overall photocatalytic performance of PCN owing to its limited charge separation efficiency is a longstanding challenge. Herein, a K⁺-doped bridge-type PCN featuring ─C≡N and ─OH surface groups is synthesized via thermal polymerization. K-PCN exhibits superior efficiency for photocatalytic H₂O₂ production (8647.78 µM·h^-1) with a quantum efficiency of 17.92% at 420 nm, remarkably surpassing that of PCN (86.96 µM·h^-1 and 0.129%). K⁺ ions tend to reside within the interlayers of PCN, where they create K⁺-bridges that reduce interlayer spacing, strength

SUBMITTER: Xue Q 

PROVIDER: S-EPMC12931227 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature