In this paper, An easy, scalable and environmentally benign chemical method was developed to synthesize micro strings of graphitic-C3N4 (msg-C3N4) through pre-treatment of melamine with HNO3 in alkaline solvent at low temperature. This methodology results in unique strings morphology of msg-C3N4 with higher surface area (290m2g-1). Therefore, msg-C3N4 was used as a photocatalyst under visible light for photodegradation of Rhodamine B, Methyl Blue and Methyl Orange. The msg-C3N4 showed enhanced photodegradation efficiency due to high surface area and favourable bandgap. The first order rate constant for msg-C3N4 was measured that confirms the higher performance of msg-C3N4 in comparison to other reported materials such as g-C3N4, Fe2O3/g-C3N4 and TiO2 nanotubes.
Specialized Research Fund for the Doctoral Program of Higher Educations （20101101110026）
School of Materials Science and Engineering, Beijing Institute of Technology,School of Materials Science and Engineering, Beijing Institute of Technology