Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5359601 | Applied Surface Science | 2015 | 25 Pages |
Abstract
The graphitic carbon nitride (g-C3N4), as one photocatalyst which possess the suitable band gap, is better for modified TiO2 and enhanced photocatalytic degradation of organic pollutants. In this work, the g-C3N4/TiO2 were successfully prepared via directly calcined the mixture of melamine and P25. The as-prepared g-C3N4/TiO2 photocatalysts were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and high resolution electron microscopy (HRTEM), Raman and Fourier transform-infrared spectroscopy (FT-IR). The photocatalytic performances of g-C3N4/TiO2 composites were investigated by degradation of ciprofloxacin. The results showed that the g-C3N4 and P25 were successfully composited, and the bond of C-N was well formed, the calcined temperature for as-prepared photocatalysts and the ratio of melamine and P25 were important to the degradation rate of ciprofloxacin. When the mixture of melamine and P25 with 1:2, and calcined temperature at 600 °C, the degradation rate of ciprofloxacin could reach 95% in 60 min. The enhanced photocatalytic performances could be mainly attributed to the suitable band gap structure with heterojunction of CN-P25. Finally, the possible transferred processes of photoelectrons and photoholes were proposed.
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Authors
Huiqin Wang, Jinze Li, Changchang Ma, Qingfeng Guan, Ziyang Lu, Pengwei Huo, Yongsheng Yan,