| Summary: | This review outlines the latest research into the design of graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) with non-metal elements. The emphasis is put on modulation of composition and morphology of g-C<sub>3</sub>N<sub>4</sub> doped with oxygen, sulfur, phosphor, nitrogen, carbon as well as nitrogen and carbon vacancies. Typically, the various methods of non-metal elements introducing in g-C<sub>3</sub>N<sub>4</sub> have been explored to simultaneously tune the textural and electronic properties of g-C<sub>3</sub>N<sub>4</sub> for improving its response to the entire visible light range, facilitating a charge separation, and prolonging a charge carrier lifetime. The application fields of such doped graphitic carbon nitride are summarized into three categories: CO<sub>2</sub> reduction, H<sub>2</sub>-evolution, and organic contaminants degradation. This review shows some main directions and affords to design the g-C<sub>3</sub>N<sub>4</sub> doping with non-metal elements for real photocatalytic applications.
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