Graphitic carbon nitride ( C3N4) has been intensively studied in the last 25 years. Although the number of papers about C3N4 published per year has been growing exponentially, there are still some unclear issues with this material. One of them is s-triazine C3N4 (s-C3N4), which is an allotrope of C3N4. The theoretical computational as well as experimental synthetic results are not unambiguous. The properties of s-C3N4 have been described only in two papers, and no similar and reproducible results have been obtained so far. This paper provides a brief overview of s-C3N4 to bring attention to this material, for example, as a potential photocatalyst.

    Abstract
    1 Introduction
    2 Theoretical research of s-C3N4
    3 Synthesis of s-C3N4
    4 Synthesis of s-C3N4 and h-C3N4 heterostructures for photocatalysis
    5 Conclusions
    References

• Petr Praus(Department of Chemistry, VSB-Technical University of Ostrava, Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava)