Earth‐Abundant CaCO ₃ ‐Based Photocatalyst for Enhanced ROS Production, Toxic By‐Product Suppression, and Efficient NO Removal

Photoinduced reactive oxygen species (ROS)‐based pollutant removal is one of the ideal solutions to achieve conversion solar energy into chemical and thus address environmental pollution. Here, earth‐abundant CaCO 3 ‐decorated g‐C N 4 (g‐C labeled as CN, sample CN‐CCO) has been constructed by a facile thermal polymerization method for safe efficient photocatalytic NO removal. The decorated “transit hub” extends π bonds CN deviate from planes steers random charge carriers, which provides extra active sites expedites spatial separation facilitate adsorption/activation reactants promote formation ROS participating in pollutant. Furthermore, boosted generation regulates oxidation pathway increases selectivity products. prefers be directly oxidized final product (nitrate) rather than toxic intermediates (NO 2 ), well demonstrated theoretically simulated ROS‐based reaction pathways experimental characterization. present work promotes degradation simultaneously suppresses by‐product, paves way