Recent advances in visible-light graphitic carbon nitride (g-C 3 N 4 ) photocatalysts for chemical transformations.

Graphitic carbon nitride (g-C 3 N 4 ) has emerged as a new research hotspot, attracting broad interdisciplinary attention in the form of metal-free and visible-light-responsive photocatalysts in the field of solar energy conversion and environmental remediation. These photocatalysts have evolved as attractive candidates due to their non-toxicity, chemical stability, efficient light absorption capacity in the visible and near-infrared regions, and adaptability as a platform for the fabrication of hybrid materials. This review mainly describes the latest advances in g-C 3 N 4 photocatalysts for chemical transformations. In addition, the typical applications of g-C 3 N 4 -based photocatalysts involving organic transformation reactions are discussed (synthesis of heterocycles, hydrosulfonylation, hydration, oxygenation, arylation, coupling reactions, etc. ).