Multifunctional Roles of Ionic Microenvironments in the Preparation, Modification, and Application of g‐C 3 N 4

Abstract As a visible light‐responsive metal‐free polymer semiconductor, graphitic carbon nitride (g‐C 3 N 4 ) has garnered increasing attention in photocatalysis but needs structural modification and functional enhancement. Recently, the rational design of ionic microenvironments (IMEs) by leveraging the tunability of various ions to endow catalysts with tailored functionalities has been elevated to a hot direction. To elucidate their respective effects on g‐C 3 N 4 , IMEs are categorized into three types, namely plasma IMEs, organic IMEs, and inorganic IMEs, according to the criteria of external field dependence, cation type, and application scenarios. These promotions include facilitated preparation,…