Magnetic Circular Dichroism Studies on g-C3N4 Nanoparticles
F. W. Guo1*, W. S. Jhang Jian1, H. W. Su1, Dmitry Zherebtsov2, Hua Shu Hsu1
1Department of Applied Physics, National Pingtung University, Pingtung, Taiwan
2South Ural State University, Russian Federation
* Presenter:F. W. Guo
The graphitic C3N4 (g-C3N4) which has the unique structure reveals the good ability in photocatalysis so it has attracted a lot of research interests in recent years. In addition, scientists also found some interesting properties with g-C3N4, for example, the appearance of unexpected ferromagnetism.
In this work, the g-C3N4 samples were prepared from the mixture of melamine and oil pitch by slow heating to 500C at ambient pressure. Room temperature ferromagnetism was also observed in these samples. Magnetic circular dichroism (MCD) has been used to clarify to magnetic origin from the spin polarized band structure of g-C3N4. The MCD spectra shows a broad MCD signal in 2.7~3 eV which can be related the band transitions of g-C3N4 evidenced by photoluminescence measurements. Further correlation between MCD and magnetic properties will be further discussed in this presentation.

Keywords: MCD, Magnetism, Graphite