Engineering a Rapid Charge Transfer Pathway for Enhanced Photocatalytic Removal Efficiency of Hexavalent Chromium over C3N4/NH2–UIO‐66 Compounds

Designing high‐efficiency photocatalysts with high charge separation and rapid charge transfer still a challenge. Herein, highly effective g‐C3N4/NH2–UIO‐66 (CNU) hybrids are developed using an engineered ZrN bond between the two components. The formation of the ZrN bond provides an electron transfer pathway between the conduction band (CB) of g‐C3N4 (CN) and Zr centers, which shortens the carrier migration distance, greatly enhancing the separation efficiency of photogeneration carriers. The as‐prepared CNU shows an outstanding performance for photocatalytic reduction of Cr(VI) under visible light irradiation due to the rapid charge carrier interfacial transfer. This work provides a promising strategy for the design of efficient photocatalysts and helps to establish an effective and sustainable method for removing Cr(VI) under ambient conditions. Herein, a highly efficient g‐C3N4/NH2–UIO‐66 heterostructure with a ZrN bond and excellent stability is explored. The ZrN bond enhances visible light harvesting and serves as a special charge transfer pathway. Such a pathway shortens the travel distance of photoexcited electrons and improves the reduction efficiency of hexavalent chromium.