Synergistic Effect of MWCNTs on the Visible-Light-Driven Photocatalytic Performance of TiO۲/SiO۲/g-C۳N۴ Composite

In this study, a TiO۲/SiO۲/g-C۳N۴/MWCNT composite was synthesized via a facile hydrothermal method for the photocatalytic degradation of pharmaceutical contaminants in water. The morphology, optical properties, and photocatalytic performance of the resulting composite were characterized using FESEM, transient photocurrent measurements, and UV-Vis spectroscopy. The results demonstrated that the incorporation of multi-walled carbon nanotubes (MWCNTs) significantly enhanced visible-light absorption and facilitated the separation of photogenerated electron-hole pairs. Consequently, the TiO۲/SiO۲/g-C۳N۴/MWCNT composite exhibited superior photocatalytic activity, achieving a ۹۲% degradation efficiency for ۲۰ mg/L of tetracycline (TC), markedly outperforming its MWCNT-free counterpart.

کلیدواژه ها:

TiO۲/SiO۲/g-C۳N۴/MWCNT composite ، photocatalyst ، visible light ، tetracycline