Polymeric carbon nitride (p-C3N4) is a promising platform as a metal-free photo-catalyst for various reactions. The p-C3N4 can be produced by thermal poly-condensation of organic precursors. Their morphological and chemical structures depend on reaction conditions during the poly-condensation. In this study, two p-C3N4 materials are produced by heat treatment of urea under different gaseous conditions with air (urea-derived carbon nitride under air, UCN-A) and N2 (UCN-N), respectively. UCN-A and UCN-N samples are mesoporous materials and show excellent photocatalytic activities for degrading rhodamine B, an organic pollutant, under the irradiation of visible light. The UCN-A shows the better photocatalytic activity than UCN-N. Various characterizations reveal that more porous structures and larger surface areas of UCN-A are reasons for the better photocatalytic performance.

Polymeric carbon nitrides produced from different gaseous conditions and their photocatalytic performance for degrading organic pollutants
    Abstract
    1 Introduction
    2 Experimental section
        2.1 Preparation of UCN-N and UCN-A
        2.2 Photocatalytic degradation of RhB
        2.3 Characterization
    3 Results and discussion
    4 Conclusion
    Acknowledgements 
    References

• Sungjin Park(Department of Chemistry and Chemical Engineering, Inha University, 100 Inha‑Ro, Michuhol‑Gu, Incheon 22212, Republic of Korea)
• Eun Young Shin(Department of Chemistry and Chemical Engineering, Inha University, 100 Inha‑Ro, Michuhol‑Gu, Incheon 22212, Republic of Korea)
• Seokhyeon Jeon(Department of Chemistry and Chemical Engineering, Inha University, 100 Inha‑Ro, Michuhol‑Gu, Incheon 22212, Republic of Korea)
• Dawoon Jang(Department of Chemistry and Chemical Engineering, Inha University, 100 Inha‑Ro, Michuhol‑Gu, Incheon 22212, Republic of Korea)