Application of N, S-Codoped TiO₂ Photocatalyst for Degradation of Methylene Blue

In this study, N, S- codoped titania photocatalyst was synthesized through an efficient and straight forward method using a single source, ammonium sulfate, as modification agent of titanium isopropoxide (TTIP) precursor. The catalyst was characterized by X-ray powder diffractometer (XRD), element Analysis of carbon, hydrogen, nitrogen (CHN), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), energy dispersive X-ray spectroscopy (EDX) and IR spectroscopy. Visible light photocatalytic studies were carried out using methylene blue pollutant. The photodegradation efficiency of methylene blue using N, S-codoped TiO₂ were 98%. Also the degradation of methylene blue was tested using P25 photocatalyst for comparison. The result of photocatalytic degradation of methylene blue indicated that photocatalytic activity of N, S-codoped TiO₂ (98%) was better than P25 (82%) photocatalyst, because the band gap of N, S-codoped TiO₂ is lower than of P25 photocatalyst.